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Optimization of An Air-cooled Heat Sink for Cooling of a Solar Photovoltaic Panel: A Computational Study Energy Build. (IF 5.879) Pub Date : 2022-06-25 Khushbu Mankani, Hassam Nasarullah Chaudhry, John Kaiser Calautit
Rapidly increasing global energy demand and resulting climate change effects have enhanced the integration of renewable systems such as solar photovoltaics into the built environment. For countries with hot climates, despite vast applications and numerous technological advancements, lower efficiencies of the solar panels due to high temperature is still a major disadvantage affecting the feasibility
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Nature-based Solution of Greenery Configuration Design by Comprehensive Benefit Evaluation of Microclimate Environment and Carbon Sequestration Energy Build. (IF 5.879) Pub Date : 2022-06-25 Chang Xi, Junwei Ding, Junqi Wang Data analysis, Zhuangbo Feng, Shi-Jie Cao
Rapid urbanization has increased the vulnerability of urban to climate change, with consequent damage to urban ecosystems (e.g., massive carbon emissions, serious environmental problem of heat wave, etc.). Nature-based solution (NBS) can regulate urban ecosystems effectively, such as increasing green infrastructure. Considering limited urban land resources, it is urgent to configure green infrastructure
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Net Zero Energy Housing: An Empirical Analysis from Measured Data Energy Build. (IF 5.879) Pub Date : 2022-06-25 Leila Nikdel, Philip Agee, Georg Reichard, Andrew McCoy
This study reports an empirical analysis of an all-electric, Net zero energy housing (NZEH) development located in a mixed-humid climate zone (4A, Virginia, USA). Circuit-level energy monitors were used to measure energy consumption and energy production data (solar photovoltaic) at 1-hr intervals in six identical apartments over 24 months. The study employs a multi-step case study methodology to a)
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Performance evaluation of a solar powered solid desiccant evaporative cooling system with different recirculation air ratios Energy Build. (IF 5.879) Pub Date : 2022-06-24 Lanbo Lai, Xiaolin Wang, Gholamreza Kefayati, Eric Hu
The evaporative cooling technology (ECT) has been regarded as an effective alternative to conventional vapour compression systems due to its energy saving and eco-friendly features. Moreover, when integrating with a solid desiccant unit, ECT can further extend its application in hot and humid environments. This paper proposed and evaluated a solar-assisted solid desiccant Maisotsenko cycle (M-cycle)
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Dynamic Insulation Systems of Building Envelopes: A Review Energy Build. (IF 5.879) Pub Date : 2022-06-23 Mohammad Fawaier, Balázs Bokor
Dynamic insulation is a promising approach that allows the heat transmission rate through building envelopes to vary in a controlled manner over time. Dynamic insulation's primary function is to change the transmissivity of the building envelope according to the actual outdoor conditions. It is applicable in almost any climate condition. The fundamental contribution of this review paper is to collect
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Digital Twin-driven approach to improving energy efficiency of indoor lighting based on computer vision and dynamic BIM Energy Build. (IF 5.879) Pub Date : 2022-06-23 Yi Tan, Penglu Cheng, Wenchi Shou, Abdul-Manan Sadick
Intelligent lighting systems and surveillance systems have become an important part of intelligent buildings. However, the current intelligent lighting system generally adopts independent sensor control and does not perform multi-source heterogeneous data fusion with other digital systems. This paper fully considers the linkage between the lighting system and the surveillance system and proposes a
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Barriers and challenges of the assessment framework of the Commission Recommendation (EU) 2019/786 on building renovation by European RTD projects Energy Build. (IF 5.879) Pub Date : 2022-06-22 Markel Arbulu, Xabat Oregi, Lauren Etxepare, Rufino J. Hernández-Minguillón
The refurbishment of buildings is one of the main keys to pursue the targets of the European Green Deal, and to accomplish the European Union has applied two mechanisms among others: the European policy and the European Research and Technological Development (RTD) projects. On the one hand, the EU has published the Commission Recommendation (EU) 2019/786 with an assessment framework composed by Measurable
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Neurophysiological evaluation of workers' decision dynamics under time pressure and increased mental demand Autom. Constr. (IF 7.7) Pub Date : 2022-06-23 Shiva Pooladvand, Sogand Hasanzadeh
Productivity demands, time pressure, and cognitively demanding construction tasks increase workers' arousal and stress; however, it is not clear how these factors may worsen risk compensation effects and lead to unanticipated hazards. This paper examined the extent to which limited time and increased mental load amplify the risk compensatory behavior of workers. Using an immersive mixed-reality environment
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Deep learning for intelligent identification of concrete wind-erosion damage Autom. Constr. (IF 7.7) Pub Date : 2022-06-23 Xiaoning Cui, Qicai Wang, Sheng Li, Jinpeng Dai, Chao Xie, Yun Duan, Jianqiang Wang
In the desert region of northwest China, the frequency of wind-sand disasters is high. All types of concrete buildings built in this area face severe wind erosion due to high wind speed, resulting in varying degrees of wind-erosion damage to concrete. To accomplish intelligent identification of concrete wind-erosion damage, a concrete wind erosion experiment was conducted in the laboratory, and a concrete
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Artificial intelligence and smart vision for building and construction 4.0: Machine and deep learning methods and applications Autom. Constr. (IF 7.7) Pub Date : 2022-06-24 Shanaka Kristombu Baduge, Sadeep Thilakarathna, Jude Shalitha Perera, Mehrdad Arashpour, Pejman Sharafi, Bertrand Teodosio, Amkit Shringi, Priyan Mendis
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Change detection for indoor construction progress monitoring based on BIM, point clouds and uncertainties Autom. Constr. (IF 7.7) Pub Date : 2022-06-24 Theresa Meyer, Ansgar Brunn, Uwe Stilla
Automatic construction progress documentation and metric evaluation of execution work in confined building interiors requires particularly reliable geometric evaluation and interpretation of statistically uncertain as-built point clouds. This paper presents a method for high-resolution change detection based on dense 3D point clouds from terrestrial laser scanning (TLS) and the discretization of space
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Linking external knowledge to heritage BIM Autom. Constr. (IF 7.7) Pub Date : 2022-06-23 Stefano Cursi, Letizia Martinelli, Nicolò Paraciani, Filippo Calcerano, Elena Gigliarelli
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Application of deep learning in facility management and maintenance for heating, ventilation, and air conditioning Autom. Constr. (IF 7.7) Pub Date : 2022-06-23 Mirza Rayana Sanzana, Tomas Maul, Jing Ying Wong, Mostafa Osama Mostafa Abdulrazic, Chun-Chieh Yip
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Dynamic control for construction project scheduling on-the-run Autom. Constr. (IF 7.7) Pub Date : 2022-06-23 O. Kammouh, M. Nogal, R. Binnekamp, A.R.M. Wolfert
Construction project management requires dynamic mitigation control to ensure a project's timely completion. Current mitigation approaches are usually performed by an iterative Monte Carlo (MC) analysis which does not reflect (1) the project manager's goal-oriented behavior, (2) contractual project completion performance schemes, and (3) stochastic dependence between construction activities. Therefore
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Sensing, perception, decision, planning and action of autonomous excavators Autom. Constr. (IF 7.7) Pub Date : 2022-06-24 Oybek Maripjon Ugli Eraliev, Kwang-Hee Lee, Dae-Young Shin, Chul-Hee Lee
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Road marking degradation analysis using 3D point cloud data acquired with a low-cost Mobile Mapping System Autom. Constr. (IF 7.7) Pub Date : 2022-06-24 Mario Soilán, Diego González-Aguilera, Ana del-Campo-Sánchez, David Hernández-López, Susana Del Pozo
Road maintenance is an important task that ensures the availability and correct function of the road infrastructure. This work presents a methodology that, first, offers an empirical radiometric analysis of the Velodyne VLP-32C laser scanner. Second, it defines a road marking degradation model that estimates the coefficient of retroreflected luminance (night visibility, RL) using the intensity attribute
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HBIM for supporting the diagnosis of historical buildings: case study of the Master Gate of San Francisco in Portugal Autom. Constr. (IF 7.7) Pub Date : 2022-06-24 Jesús Garcia-Gago, Luis Javier Sánchez-Aparicio, Mario Soilán, Diego González-Aguilera
This paper aims at developing a Historical Building Information Modelling methodology for supporting the diagnosis phase in historical constructions. To this end, the work evaluates the capacity of HBIM for integrating all the data generated during the pre-diagnosis and previous tests, including the data coming from point cloud clustering methods. According to this, we propose different families with
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Modeling impacts of ventilation and filtration methods on energy use and airborne disease transmission in classrooms J. Build. Eng. (IF 5.318) Pub Date : 2022-06-24 Theresa Pistochini, Caton Mande, Subhrajit Chakraborty
Lowering the potential of airborne disease transmission in school buildings is especially important in the wake of the COVID-19 pandemic. The benefits of increased ventilation and filtration for reducing disease transmission compared to drawbacks of reduced thermal comfort and increased energy consumption and electricity demand are not well described. A comprehensive simulation of outdoor air ventilation
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A novel parallel wire steel-reinforced mortar (PW-SRM) method versus textile reinforced mortar (TRM) for out-of-plane strengthening of masonry walls J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Ali Raji, Davood Mostofinejad, Mohammad Reza Eftekhar
Lateral loads cause extensive damage to buildings due to the weakness of bearing out-of-plane un-reinforced masonry (URM) walls. Strengthening URM walls is consequently favored by researchers aiming at achieving building and respective occupant safety. The strengthening of masonry structures with textile reinforced mortar (TRM) or steel-reinforced mortar (SRM) has become prevalent in the last two decades
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Intelligent design method for beam and slab of shear wall structure based on deep learning J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Pengju Zhao, Wenjie Liao, Hongjing Xue, Xinzheng Lu
Beam and slab design is a critical component of shear wall structure design. Currently, conventional manual design is time-consuming, and defining objective functions and design variables of an optimization design is challenging. In contrast, deep learning methods can learn high-dimensional image features and generate new designs, providing new solutions for efficient and intelligent structural design
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Overheating in existing and renovated Danish single- and multi-family houses J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Laura Annabelle Bugenings, Aliakbar Kamari
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Investigation of early drying shrinkage of ultrahigh-performance concrete under windy conditions J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Yang Du, Lifeng Zhang, Shaoqin Ruan, Xiaoqian Qian, Kuangliang Qian
Environmental factors (e.g., wind) may deteriorate the volume stability of ultrahigh-performance concrete (UHPC), which undermines structural safety. Therefore, in this study, the effects of wind speeds (WSs) on the early shrinkage (e.g., autogenous/drying shrinkage) of UHPC were investigated, and the shrinkage behaviors were further explained from the evaporation and pore structure distributions of
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Effect of loading patterns on in-plane flexural hysteretic performance of CHS X-connections J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Zhao Bida, Li Fulong, Chengqing Liu, Huang Zhenzhe
This paper presents an experimental investigations to study the hysteretic behavior of circular hollow section (CHS) X-connections which widely applied in various tubular structures. Cyclic in-plane bending moment (IPBM) loading patterns and geometric parameter of brace-to-chord diameter ratio (β) were varied in testing four connection specimens, to evaluate the influence of load patterns on the hysteretic
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Experimental and analytical study on performance of seismic sway braces for suspended piping systems J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Qingxue Shang, Lin Qiu, Tao Wang, Jichao Li
The severe damages to nonstructural components (NSCs) are frequently reported following earthquakes. Suspended piping systems are among the most common NSCs, since they are widely installed in modern buildings. As demonstrated by the failures reported after earthquakes, piping systems are often subjected to piping connection damage, or damage resulted from inadequate braces. Therefore, there is an
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Mechanical and electrical properties investigation for electrically conductive cementitious composite containing nano-graphite activated magnetite J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Zhenhua Ren, Junbo Sun, Yufei Wang, Xiantao Zeng, Hao Zeng, Weichen Tang, Xiangyu Wang
Electrically conductive cementitious composite (ECCC) is a multifunctional material utilized in structural health monitoring (SHM), electromagnetic shielding, and pavement deicing. The addition of nano-graphite (NG) in ECCC can prominently enhance the electrical behavior and improve the mechanical strength due to its filling of molecular pores. Besides, magnetite can replace part of graphite owing
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Effect of various biochars on physical, mechanical, and microstructural characteristics of cement pastes and mortars J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Muhammad Haris Javed, Muhammad Ali Sikandar, Waqas Ahmad, Muhammad Tariq Bashir, Raid Alrowais, Muhammad Bilal Wadud
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Behavior of unconfined and polyethylene terephthalate (PET) FRP-confined coal reject concrete under compression J. Build. Eng. (IF 5.318) Pub Date : 2022-06-23 Hongchao Zhao, Jun-Jie Zeng, Wei-Te Liu, Yong-Long Li, JinJing Liao, Bing Yuan
Fiber-reinforced polymer (FRP) confinement has been proposed to mitigate the detrimental effects of coal rejects concrete (CRC) in the present study. Polyethylene terephthalate (PET) FRP jacket was adopted to confine CRC for a new type of novel column members, and the resulting columns are referred to as PET FRP-Confined Coal Reject columns (PFCCRs). PFCCRs are often sustainable and cost-effective
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Explicit double-phase-field formulation and implementation for bending behavior of UHPC-NC composite beams J. Build. Eng. (IF 5.318) Pub Date : 2022-06-22 Siqi Yuan, Teng Tong, Zhao Liu, Peng Yang
The Phase-field model emerges as a promising method since it can automatically capture the initiation, propagation, coalescence, and branching of cracks without any tracking algorithms. Despite its success in simulating brittle and quasi-brittle cracks, tensile (mode I) and shear (mode II) fractures cannot be distinguished effectively. Moreover, the phase-field model is rarely applied to specimens
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Effect of high-temperature on the behavior of single and hybrid glass and basalt fiber added geopolymer cement mortars J. Build. Eng. (IF 5.318) Pub Date : 2022-06-20 Soner Guler, Zehra Funda Akbulut
This study aims to investigate the workability, visual appearance and mass loss, compressive, and flexural strength properties of the single and hybrid glass (GL) and basalt (BA) fiber added fly ash (FA)-based geopolymer cement (GPC) mortars after the high-temperature effect. Micro- and macro - GL and BA fibers were added to the GPC mixtures in two different volumetric ratios, 0.5% and 1%. 300, 500
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Topology and shape optimization of steel plate shear walls for enhancing the seismic energy dissipation capacity J. Build. Eng. (IF 5.318) Pub Date : 2022-06-20 Arash Akbari Hamed, Ayda Samadi, Mohammad Charkhtab Basim
In recent years, steel plate shear walls (SPSW) have been considered as one of the reliable passive seismic-resisting systems, which are classified into two general categories of stiffened and unstiffened types. Unstiffened SPSWs experience early buckling at low shear loads and hence, the pinching occurs in obtained hysteretic curves and this event significantly reduces the amount of dissipated seismic
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Multi-scale study on interfacial bond failure between normal concrete (NC) and ultra-high performance concrete (UHPC) J. Build. Eng. (IF 5.318) Pub Date : 2022-06-21 Jiangjiang Yu, Boshan Zhang, Weizhen Chen, Hang Liu, Heng Li
It is a promising way to strengthen and repair the damaged normal concrete (NC) structure with ultra-high performance concrete (UHPC), and the interfacial performance between NC and UHPC is a critical issue. This paper aims to reveal the debonding failure performance between UHPC (repair material) and NC (substrate material) under tensile loading and shear loading. A multi-scale analysis method is
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Life cycle assessment of traditional Saharan houses: Towards a sustainable building? J. Build. Eng. (IF 5.318) Pub Date : 2022-06-21 Dalel Kaoula, Soumia Rahmani, Ikhlas Lemita, Mohamed Abdelmomen Ould Zemirli, Samir Semahi
While traditional buildings have demonstrated their ability to provide a comfortable indoor thermal environment and to reduce their energy consumption, their ecological and human health performances are not widely known. This paper proposes a new approach to demonstrate and optimize the environmental performances of four traditional Saharan houses through Life Cycle Assessment (LCA), mainly by intervening
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Study of the flat plate solar collector's efficiency for sustainable and renewable energy management in a building by a phase change material: Containing paraffin-wax/Graphene and Paraffin-wax/graphene oxide carbon-based fluids J. Build. Eng. (IF 5.318) Pub Date : 2022-06-19 Nidal H. Abu-Hamdeh, Ahmed Khoshaim, Mahmoud A. Alzahrani, Randa I. Hatamleh
Energy management in a building is to control and lessen the energy consumption, to decrease both costs and carbon emissions. Building-integrated thermal systems are adept to produce heat. Various scenarios have been planned to integrate heat into a building formation to enhance performance of entity system, supply indoor heating, and provide hot water. Concept backside Flat-plate Solar collector is
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Characterization of cement-based spacers for high performance concretes J. Build. Eng. (IF 5.318) Pub Date : 2022-06-20 Bekir Çomak, Batuhan Aykanat, Sait Aydin, Mehmet Emiroğlu
Due to the increasing trend towards high-performance concretes in recent years, cement-based spacers are becoming increasingly important instead of plastic-made ones in buildings. Cement-based concrete spacers with high resistance and durability have been produced, and their performance has been assessed in this study. Fly ash and blast furnace slag have been preferred as aggregate in this study due
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Semi-dry technology mediated lignocellulosic coconut and energy reed straw reinforced cementitious insulation panels J. Build. Eng. (IF 5.318) Pub Date : 2022-06-20 Zsuzsanna Mária Mucsi, K.M. Faridul Hasan, Péter György Horváth, Miklós Bak, Zsófia Kóczán, Tibor Alpár
Sustainable cementitious composite panels are gaining interest as efforts to reduce environmental burdens increase. This study investigated the possibilities and reinforcement effects of developing composite panels from coconut husk derived materials (CM) and reed straw (RS) particles in the presence of Ordinary Portland cement (OPC). Five composite panels with 1200 kg/m3 densities and 400 × 400 × 8 mm3
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Effect of magnesium silicate hydrate (M-S-H) formation on the local atomic arrangements and mechanical properties of calcium silicate hydrate (C-S-H): In situ X-ray scattering study Cem. Concr. Res. (IF 10.933) Pub Date : 2022-06-23 Gyeongryul Kim, Sumin Im, Hyeonseok Jee, Heongwon Suh, Seongmin Cho, Manabu Kanematsu, Satoshi Morooka, Taku Koyama, Yuhei Nishio, Akihiko Machida, Jihoon Kim, Sungchul Bae
This study explored the effect of M-S-H formation on the local atomic arrangements and mechanical properties of C-S-H. The elastic moduli of the samples were calculated using shifted atomic distances (r) and d-spacings (d) acquired by applying an external load on the pastes during X-ray scattering experiments. The experimental results indicated that the crystal structure of C-S-H remained intact with
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A lignin-based capsule system with tunable properties tailored for robust self-healing concrete Cement Concrete Comp. (IF 7.586) Pub Date : 2022-06-23 Arkabrata Sinha, Darren Lim Zhen Hui, Jianqiang Wei
Self-healing is an ideal mechanism for concrete to achieve self-repair of microcracks. While extensive efforts have been invested in capsule-based autonomous self-healing, the dilemma between capsules’ survivability during concrete mixing and their rapture upon concrete cracking to release healing agents remains unsolved. This study aims to address this challenge by investigating a lignin-based capsule
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Real-time monitoring the electrical properties of pastes to map the hydration induced microstructure change in cement-based materials Cement Concrete Comp. (IF 7.586) Pub Date : 2022-06-21 Liming Huang, Luping Tang, Ingemar Löfgren, Nilla Olsson, Zhenghong Yang
The effect of the supplementary materials (SCMs) on the moisture content and ion diffusivity at different hydration time is important for the service life modelling of modern concrete. This study designed a simple but valid method to monitor the microstructure change in pastes during hydration. A procedure easy to implement was proposed to detect the water content in pastes. The electrical conductivity
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Multi-Technology Building System Retrofits for Utility Incentive Programs: Savings, Costs and Baseline Considerations Energy Build. (IF 5.879) Pub Date : 2022-06-22 Cindy Regnier, Paul Mathew, Jordan Shackelford, Sang Hoon Lee, Alastair Robinson, Travis Walter
Utility incentive programs are an important channel to support the deployment of energy efficiency in buildings. To date, these programs have largely been limited to single-component strategies. Many utilities are motivated to identify and develop multi-component system retrofits to achieve deeper energy savings, which are essential to achieving broader energy and greenhouse gas reduction goals in
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A labelling strategy to define airtightness performance ranges of naturally ventilated dwellings: an application in southern Europe Energy Build. (IF 5.879) Pub Date : 2022-06-22 Vitor E.M. Cardoso, M. Lurdes Simões, Nuno M. M. Ramos, Ricardo M.S.F. Almeida, Manuela Almeida, João N. D. Fernandes
Energy efficiency and indoor air quality are frequently two conflicting objectives when establishing the air change rate (ACH) of a dwelling. In Europe, the northern countries have a clear focus on energy conservation, leading to an obvious awareness of the importance of airtightness, which translates into a high level of regulation and implementation. Meanwhile, the southern counterparts experience
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Study on the effect of different types and distribution ratio of heat users on operation performance of the distributed solar centralized heating system Energy Build. (IF 5.879) Pub Date : 2022-06-22 Mengmeng Guo, Yanfeng Liu, Yaowen Chen, Wenzhen Gao, Dengjia Wang, Huanlong Tang, Huaican Liu
The distributed solar centralized heating system (DSCHS) is formed by connecting the dispersed solar heating users through the heat pipe network. This system is designed based on research into the effect of various types of distribution ratios of heat users on the overall operating performance of the heating system. Based on the energy balance process analysis of the distributed solar heating system
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Role of pore structure on resistance to physical crystallization damage of calcium sulfoaluminate belite (CSAB) cement blends Cem. Concr. Res. (IF 10.933) Pub Date : 2022-06-21 Shuyan Yang, B. Cansu Acarturk, Lisa E. Burris
The resistance to physical sulfate damage was tested for a variety of cementitious mixtures including ordinary portland cement, calcium sulfoaluminate belite (CSAB) cement, a CSAB-fly ash blend and an air-entrained CSAB. Mortar bars were exposed to DI water or 5 % sodium sulfate solutions under cyclical wet-dry conditions. The expansions of the specimens were measured after each wetting cycle. A water
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Review on CO2 curing of non-hydraulic calcium silicates cements: Mechanism, carbonation and performance Cement Concrete Comp. (IF 7.586) Pub Date : 2022-06-22 Xiaoli Wang, Ming-Zhi Guo, Tung-Chai Ling
The manufacture of cement is associated with a large amount of CO2 emissions. Mineral carbonation technology (MCT) has been identified as one of the viable solutions to reduce the high environmental impacts of cement and concrete production via a long-term storage of atmospheric CO2 as stable forms of carbonates in cement-based products. This article reviews the status quo of hydration and carbonation
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The role of age on carbon sequestration and strength development in blended cement mixes Cement Concrete Comp. (IF 7.586) Pub Date : 2022-06-22 Anjaneya Dixit, Guoqing Geng, Hongjian Du, Sze Dai Pang
While early-age carbonation of concrete has gained interest as an avenue for carbon sequestration, the influence of curing age on carbon uptake for blended cements is an open subject. This has significant practical utility given the popularity of supplementary cementitious materials (SCM) as alternate binders. Pastes and mortar samples were prepared by replacing 20% by wt. cement with four SCMs of
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Experimental study of mechanical properties of double-helix BFRP fiber reinforced concrete at high strain rates Cement Concrete Comp. (IF 7.586) Pub Date : 2022-06-22 Chunlei Zhang, Hong Hao, Yifei Hao
Fibers made of basalt fiber reinforced polymer (BFRP) have been used to reinforce concrete material. BFRP fiber with double-helix geometry was recently proposed, with demonstrated superior bond-slip behavior between fiber and concrete matrix hence improved reinforcing effects on concrete materials. To further examine the contribution of double-helix BFRP fibers to the impact resistance of concrete
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Innovative standard degree-day indicator (SDI) concept and application for monthly energy consumption control Energy Build. (IF 5.879) Pub Date : 2022-06-20 Zekai Şen
In practice, monthly temperature records play a major role calculating the heating and cooling degree-days of the air conditioner management in buildings. Classically, heating and cooling degree calculations are based on the comparison of outdoor temperature measurements with a standard level called the base temperature. Truncating the temperature series at a constant base temperature causes heating
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Performance investigation of a grid-connected system integrated photovoltaic, battery storage and electric vehicles: A case study for gymnasium building Energy Build. (IF 5.879) Pub Date : 2022-06-20 Shaojie Li, Tao Zhang, Xiaochen Liu, Zhifeng Xue, Xiaohua Liu
It has been a pressing challenge for human beings to reduce the energy consumption of buildings and decrease carbon emission. The application of photovoltaic (PV) system in buildings is identified as a renewable energy and carbon reduction approach. As a kind of typical building, the gymnasium usually has a large non-occupation roof area, which shows great application potential to cover the building
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Extending IFC for multi-component subgrade modeling in a railway station Autom. Constr. (IF 7.7) Pub Date : 2022-06-21 Hao Pu, Xiaomeng Fan, Paul Schonfeld, Wei Li, Wei Zhang, Fanghua Wei, Peng Wang, Changhuai Li
The BIM modeling of Multi-Component Subgrade in a Railway Station (MCSRS) suffers from an inefficient manual approach due to its specific features and absence of a data standard. The Industry Foundation Classes (IFC) has been widely used for describing various components in the building industry while its current version fails to depict an MCSRS. In this study, the IFC is extended to describe the geometric
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Barbed-wire reinforcement for 3D concrete printing Autom. Constr. (IF 7.7) Pub Date : 2022-06-21 Maryam Hojati, Ali M. Memari, Mehrzad Zahabi, Zhengyu Wu, Zhanzhao Li, Keunhyoung Park, Shadi Nazarian, José P. Duarte
3D-printing has been growing in acceptance in the construction industry owing to its transformative potential in concrete materials. One of the main challenges for its further adoption is the integration of reinforcement given the difficulty of incorporating steel rebars and the formation of cold joints between filaments. This study proposes the use of barbed wires, fencing wires with sharp thorn-like
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Learning-driven construction productivity prediction for prefabricated external insulation wall system Autom. Constr. (IF 7.7) Pub Date : 2022-06-21 Jaemin Jeong, Jaewook Jeong, Jaehyun Lee, Daeho Kim, JeongWook Son
The recent shortage of young skilled laborers is one of the impending issues facing the global construction industry. To address these issues, the prefabricated external insulation system (PEIS) can be suggested as an alternative. However, before applying it to construction projects, a construction productivity analysis is difficult due to the complexity of simulation modeling and the absence of real
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Influence of strain rate on the mechanical properties of autoclaved aerated concrete J. Build. Eng. (IF 5.318) Pub Date : 2022-06-21 Ningombam Reena Devi, Prateek Kumar Dhir, Pradip Sarkar
The present work evaluates compressive strength and splitting tensile strength of Autoclaved Aerated Concrete (AAC) through systematic laboratory testing under varying strain rate conditions followed by a numerical calibration study. The result of this study shows that both the compressive and splitting tensile strength are significantly dependent on displacement rate. It was found that the compressive
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Experimental and numerical investigations on the influence of center-hung scoreboard on dynamic characteristics of suspend-dome structure J. Build. Eng. (IF 5.318) Pub Date : 2022-06-18 Suduo Xue, Zhen Lu, Xiongyan Li, Renjie Liu, Zetao Zhao, Hui Jing, Qinxin Fan, Tifeng Liu, Majid Dezhkam
The LED display, i.e., the center-hung scoreboard, nowadays has become an indispensable display device in large stadiums, and some of which with weight is more than 30t. To investigate the influence of center-hung scoreboard load on the dynamic characteristics of the suspend-dome structure, a 1:20 dynamically scaled model of the Lanzhou Olympic Sports Complex was designed, considering different lifting-lowering
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Multistep nucleation and growth mechanism of aluminosilicate gel observed by cryo-electron microscopy Cem. Concr. Res. (IF 10.933) Pub Date : 2022-06-21 Zhao Qing Tang, Felipe Basquiroto de Souza, Roger J. Mulder, KwesiSagoe-Crentsil, Wenhui Duan
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Effect of bifurcation angle and fire location on smoke temperature profile in longitudinal ventilated bifurcated tunnel fires Tunn. Undergr. Space Technol. (IF 5.915) Pub Date : 2022-06-21 Xinling Lu, Miaocheng Weng, Fang Liu, Fei Wang, Jiaqiang Han, Sherman Chipok Cheung
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Determination of thrusts for different cylinder groups during shield tunneling Tunn. Undergr. Space Technol. (IF 5.915) Pub Date : 2022-06-21 Xuyang Wang, Dajun Yuan, Dalong Jin, Hui Jin, Yi Yang, Jin Wu
The hydraulic thrust system that emphasizes grouped controlling of the shield machine is used for driving forward and pose adjustment. To control and regulate the pose of the shield machine precisely, it is of great significance to solve the total thrust and grouped thrusts (thrusts for different cylinder groups) reasonably. This study aims to develop a novel thrust model to calculate the total thrust
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Evaluating performance of different generative adversarial networks for large-scale building power demand prediction Energy Build. (IF 5.879) Pub Date : 2022-06-16 Yunyang Ye, Matthew Strong, Yingli Lou, Cary A. Faulkner, Wangda Zuo, Satish Upadhyaya
As an unsupervised-learning data-driven model, Generative Adversarial Networks (GANs) have recently attracted a lot of attention for various applications. There is potential to apply GANs for large-scale building power demand prediction, which is needed for power grid operation. However, there are many GAN variations and it is unclear which GAN is suitable for this application. To answer this question
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Generating LOD3 building models from structure-from-motion and semantic segmentation Autom. Constr. (IF 7.7) Pub Date : 2022-06-20 B.G. Pantoja-Rosero, R. Achanta, M. Kozinski, P. Fua, F. Perez-Cruz, K. Beyer
This paper describes a pipeline for automatically generating level of detail (LOD) models (digital twins), specifically LOD2 and LOD3, from free-standing buildings. Our approach combines structure from motion (SfM) with deep-learning-based segmentation techniques. Given multiple-view images of a building, we compute a three-dimensional (3D) planar abstraction (LOD2 model) of its point cloud using SfM
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Detection and classification of pipe defects based on pipe-extended feature pyramid network Autom. Constr. (IF 7.7) Pub Date : 2022-06-20 Wenhao Guo, Xing Zhang, Dejin Zhang, Zhipeng Chen, Baoding Zhou, Dingfa Huang, Qingquan Li
In image-based pipe defect detection research, the effective utilization of the information in the two-dimension (2D) image is directly related to the sampling of the image. The existing inspection methods do not analyze the pipeline imaging but rather directly use the object detection method for defect detection, resulting in a bottleneck problem for the accuracy. In this study, the pipeline imaging
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Brick wall moisture evaluation in historic buildings using neural networks Autom. Constr. (IF 7.7) Pub Date : 2022-06-20 Anna Hoła, Sławomir Czarnecki
The article presents the results of numerical analyses and experimental research concerning the neural evaluation of the mass moisture content Umc of brick walls in historic buildings. For the purpose of training, testing and validating artificial neural networks, a representative data set was built on the basis of tests of the moisture content and salinity of brick walls in ten historic buildings
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Excavator joint node-based pose estimation using lightweight fully convolutional network Autom. Constr. (IF 7.7) Pub Date : 2022-06-20 Yapeng Guo, Hongtao Cui, Shunlong Li
Current deep-learning-based excavator pose estimation methods usually face problems such as high memory consumption and low operation speed owing to large parameter redundancy. This paper presents a joint node-based excavator pose estimation approach using a lightweight fully convolutional network (FCN) that achieves higher accuracy with lower computation and storage requirements. The method directly