Resilience-based seismic design of buildings using seismic isolation has become a critical issue. Currently, there are two design codes for isolated structures in China, exhibiting significant differences. It is critical to investigate the resilience-based design of isolated buildings using these codes. Hence, using reinforced concrete (RC) frame buildings as an example, two groups of buildings with

An innovative high-strength steel framed-tube structure system with web-bolted double-channel shear links (SFTS-WSL) is introduced herein as an alternative solution to strengthening the seismic performance and earthquake resilience of structures while maintaining the recognized advantages of conventional steel framed-tube structures (SFTS). In the SFTS-WSL, the shear links consist of a double-channel

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The seismic performance of steel-plate concrete (SC) shear walls is numerically investigated for various SC wall geometrical shapes. Steel faceplates and infill concrete are two main components of SC walls; a full connection between steel and concrete is required for composite action. A comprehensive set of SC wall specimens with different cross-sectional shapes and geometrical properties were tested

The current trend of increasing the height limits of timber buildings makes wind-induced vibrations a non-negligible issue. The dynamics of high-rise timber structures are discussed, focusing on accelerations and comfort assessment of the currently tallest timber building in the world, namely, the 18-storey timber building in Norway. Verifications according to available standards were firstly carried

The field of semiactive control dampers for structural control has seen a significant advancement in recent years. However, the controllers proposed in recent years have been computationally inefficient, time consuming, and did not allow the designer the flexibility in overall structural control. Consequently, this study presents a sequence of numerical and experimental studies conducted to determine

This paper investigates the behavior of high-rise composite buildings with composite shear walls and concrete-filled steel tubular (CFST) columns using a numerical model in OpenSees. In the model, the geometric and material nonlinearity of structural elements are captured by utilizing a fiber force-based beam-column elements with rigorously modified material stress–strain relationships. Besides, the

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Tall buildings have generally been developed as solo towers. As tall buildings become ever taller, how to produce reasonably increased structural depths against lateral wind loads and maintain desirable lease depths simultaneously are critical design considerations. Conjoined towers have great potential to resolve these structural and architectural design issues holistically. While many different structural

The study proposes a practical strengthening method for improving the seismic behavior of reinforced concrete square columns using spiral as lateral reinforcement in moderate seismic zone regions. Two specimens one without ductile detailing and the other with ductile detailing designed as per Indian standard specifications and six specimens with spiral ties (in one direction and cross directions) at

This paper comprehensively presents the results of a wind tunnel experiment of the wind pressure fluctuating characteristics of a long-span roof structure, namely the fluctuating wind pressure coefficient (FWPC), wind pressure power spectrum, and wind pressure coherence. The variation trend of FWPCs in the wind directions of 0°, 45°, and 90° were analyzed in sealed and open conditions, as well as the

In this paper, the behavior of bolted and welded beam-to-column connections exposed to high temperatures is investigated. In this regard, 16 effective parameters are considered as the inputs, along with the connection rotation as the output. Finite element models of bolted and welded connections have been verified and used to generate sufficient data for equation training by the gene expression programming

According to the concept of performance‐based design, the fire safety design of the timber structures should be focused on the actual design fire, which represents the realistic fire situation in a given building. However, the current prescriptive only provides a method for evaluating the fire resistance of timber components under standard fire. This paper proposed an energy‐based time equivalent approach

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In this study, in order to determine the outer shell geometry of high‐rise diagrid structures by means of minimum structural material utilization, simplified strength‐ and stiffness‐based design methods are encoded in MATLAB with the help of SAP2000 OAPI (Open Application Programming Interface) codes and genetic algorithm (GA). The computer code is designed to get most of the inputs from the building

An innovative self‐centering‐energy‐dissipation device (SCED) based on a superelastic shape memory alloy (SMA) is developed. This device exhibits asymmetric, flag‐shaped hysteretic behavior and tension–compression symmetry property. The symmetry is attributed to the tension‐only state of the SMA wires in the device during the loading process. The working principle of the device is described, and a

In this paper, the effect of outrigger on key seismic design parameters of tall buildings with braced or shear wall core is studied. Based on the results of modal response spectrum (MRS) and nonlinear time history (NLTH) analyses of 44 models with braced or wall core, discussed in the companion paper and pushover analysis and presented in this part, the effect of outrigger and its placement level on

This paper puts forward a new type of the precast hollow shear wall. Focusing on seismic performance, the low‐frequency cyclic loading tests of five precast specimens and two cast‐in‐situ specimens in full size are conducted for comparison. The yielding and failure mechanism of specimens are analyzed and compared. The reliability of the vertical connection of precast hollow shear wall structure under

In modular steel buildings, the corner bracket type inter‐module connection is a commonly used way of connecting adjacent modules together. However, the detailed working mechanisms of this connection are still not well known. In this study, the mechanical properties of two corner bracket type inter‐module connections were identified based on reported tests and refined finite element simulations. A

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Designers usually use modal response spectrum analysis (MRSA) in design of tall buildings. This paper studies the reliability of this technique in predicting real seismic behavior of tall buildings with outrigger and belt truss. Four tall buildings utilizing either braced or reinforced concrete shear wall core with 28 and 56 stories were designed as the base models according to current design codes

Lead rubber bearings (LRBs) are widely used in the seismic isolated structures. However, the lateral and vertical stiffness of rubber bearing would degrade under high pressure and larger shear strain, which has influence on the structural safety under great earthquakes. This paper proposes a novel hybrid isolation bearing (HIB) with uncoupled compression and shear mechanism. The HIB consists of sliding

The low‐damage self‐centering precast concrete (LDSCPC) frame connection was a kind of earthquake‐resilient joint. It was composed of precast beams and columns with embedded steel connectors, post‐tensioned tendons, and replaceable metallic yield dampers. The LDSCPC connections showed excellent self‐centering ability and low‐damage characteristics in cyclic load tests. However, the energy dissipation

A precast posttensioned (PT) concrete frame, which consists of PT composite beams, precast columns, and cast‐in‐place (CIP) core regions, was developed as an emulative structure in this paper. Cyclic loading tests were conducted on two 1/3‐scale frames, including a precast frame and a CIP control specimen, to investigate the seismic performance. The axial compression ratios of the specimens were 0

A frame pin‐supported wall structure (FPWS) is a typical rocking structure that releases constraints at the bottom of the wall. The existing studies have demonstrated that FPWSs can control the structural deformation effectively. A distributed parameter model (DPM), which consists of a flexural beam and a shear beam connected by infinitely rigid links, is used to describe the performance of FPWSs.

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Composite slabs without outer longitudinal reinforcement are a new option for assembled shear walls, which are easier to be transported. However, their performance, especially their seismic behavior, which is crucial to assembled structures, is still unclear. Furthermore, the effect of whether an additional reinforcement is incorporated, and its length on seismic behavior is also unclear. Therefore

A tubed mega frame structure is composed of tubes located at the perimeter of the structure as mega columns and mega beams. This paper explores the applicability of this structural system to supertall buildings in high seismic intensity areas. First, a refined finite element (FE) model of a 585‐m tall tubed mega frame structure was built in ABAQUS, as well as a mega‐braced frame‐core structure on which

A new unbonded post‐tensioned precast concrete (PTPC) frame with controllable post‐decompression stiffness (CPDS), achieved by employing novel variable friction energy dissipaters (VFEDs), is proposed in this paper. A steel corbel (SC) is used in the CPDS‐PTPC connection to enhance the shear capacity. The VFED incorporates grooved steel plates and a combination of Bellville washers to provide variable

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This paper presents a metaheuristic‐based optimization methodology for optimum design of axially symmetric cylindrical reinforced concrete walls that are a type of thin shells. In the methodology, recently proposed metaheuristic algorithm called Jaya algorithm is conducted with well‐known method called flexibility theory. The thickness of the wall is defined as a design variable of the optimization

Skyscrapers are among the most distinctive building types of the modern age. Since many resources are attributed to these buildings, their design should consider a proper performance‐based construction economy and environmental sustainable development. This research introduces a new concept for a bundled tall building founded on the use of a multi‐core‐outrigger system, which is additionally enriched

As buildings become taller and slender, they become more sensitive to wind‐induced vibrations. Commonly used solutions to mitigate wind‐induced vibrations are structural system modifications and integration of supplemental damping devices. This paper presents a procedure to optimize the structural system and the damping device configuration with the goal of reducing wind‐induced vibrations. The performance

Accurate calculation of the additional damping ratio provided by the damper to the structure is a necessary parameter for evaluating and selecting the optimal damping design scheme. At present, bilinear model is usually adopted to calculate the additional damping ratio of buckling‐restrained brace (BRB) and metal damper, but this method is not accurate. The hysteretic characteristics of the dampers

This study outlines the cyclic loading response of a concrete‐encased steel profile composite column‐reinforced concrete beam connection. The experimental study performed for an interior joint. The column in joint was designed as a concrete‐encased I‐steel profile composite column according to Eurocode 4, and the beam was designed as a regular reinforced concrete beam according to local building codes

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By proposing a multiple rocking infill wall–frame (MRWF) system, this paper investigates the effects of wall–frame interaction on the seismic response of self‐centering walls. In the MRWF system, infill walls are connected to the adjacent beams through posttensioned tendons, which provide the self‐centering ability, and the energy dissipation capacity of the system is enhanced using O‐shaped steel

Outriggers, which should be systematically analyzed and designed based on seismic performance methods in the different seismic level actions, can improve the lateral stiffness of irregular high‐rise structures. In this paper, a concrete‐filled steel frame‐core tube‐outrigger structural system is adopted for a practical overrun high‐rise building with an obviously asymmetrical vertical setback in a

A corner gusset plate possesses interfaces to both beam and column. To calculate the force demands of corner gusset plate interfaces, several methods have been proposed by researchers. No method has been proposed to determine dimensions and force demands for the gusset plates of chevron‐Special Concentrically Braced Frames (chevron‐SCBFs), so far. Generally, researchers utilize Uniform Force Method

Although the mechanics of free‐standing rocking cores have been amply investigated and that numerous replaceable energy dissipating devices with recentring capabilities have been proposed, the literature on complete sustainable earthquake resistant structures has not been fully developed. Seismic sustainability (SS) can be achieved if and only if the structure is capable of collapse prevention (CP)

This paper presents the simplified approach based on the artificial neural network (ANN) for predictions of the dynamic along‐wind response in the context of the Indian Wind Standard IS 875 (Part 3): 2015. This standard provides direct guidelines for the specific aspect ratio of buildings (h/b ratio as 3, 5, 10, and 20) for assessing along‐wind loads. Evaluation of dynamic wind load and its responses

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This paper presents a simple and efficient analytical model for nonlinear response analysis of steel plate shear wall (SPSW) structural systems. The proposed model combines individual contributions of the boundary frame and the infill plate. It includes a nonlinear spring element that simulates the global response of the infill plate. The load‐deformation characteristic of this element is defined by

Because of geometric nonlinearities, vibrations in two horizontal directions can generate a torsional moment that induces a torsional response, even in a structure with no eccentricity; we term this phenomenon Q–Δ effect. In this study, the torsional response caused by the Q–Δ resonance was investigated by performing a shaking table test that involves a single‐layer symmetric specimen. The specimen

For tall buildings, values of wind force coefficients can be obtained from wind tunnel tests or Computational Fluid Dynamics (CFD). This paper is concentrated to analyze a set of CFD data and propose parametric equations for determining force coefficients in the alongwind and crosswind direction (Cfx and Cfy) of tall buildings with horizontal limbs. Initially, a parametric study is performed with CFD

The purpose of this study is to evaluate the structural behavior of concrete‐filled steel tube (CFT) column to H‐beam connections with vertical through‐plate through full‐scale experiments and examine retrofit methods using the finite element method to improve the connection performance. For this purpose, monotonic loading tests were performed on three full‐scale specimens with varying thickness of

In this study, the long‐term differential foundation settlement and vertical shortening of super‐tall buildings are investigated considering the coupling effect. At first, a time‐dependent settlement model is proposed to predict the foundation settlement based on the construction sequence method, in which both soil compression and pile shortening are considered. The pile shortening including the elasticity

Twelve half‐scale flanged reinforced concrete (RC) shear wall specimens with high‐strength stirrup were tested to failure under cyclic loading. The effects of axial load ratio, aspect ratio, and web confinement on seismic performances were critically examined. All specimens showed an expected flexural‐dominant behavior, with the crushing of the compressed concrete and the buckling of reinforcement

The outrigger system is an effective tall building system used at one or multiple locations of high‐rise buildings. It is designed to control and minimize lateral displacement and to increase bending stiffness of the buildings by changing the load transfer mechanism of the structural systems. This paper presents a framework for estimation of the optimum location of the outriggers with structural engineering

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Diagrid system is known for its efficient structural behavior besides its outstanding aesthetic characteristics and architectural flexibility. However, a brief existing study on the nonlinear performance of the diagrid system has reported an inefficient nonlinear behavior. Diagrid with fused‐shear link is a newly introduced system that can solve this flaw in the conventional diagrids and keep the advantages

A novel brace system with a displacement amplification mechanism for damper energy dissipation is proposed in this paper. Theoretical mechanism of the multi‐limb brace damper system (MLBDS) is established. Finite element models are established to confirm the effectiveness of the proposed system. The seismic performance of the MLBDS is compared with those of traditional brace damper systems. Comparison

This paper reported the effects of the pre‐reinforcement to the mortise‐tenon joints with glued‐in rods that were mounted near the surface of the tenon. Fifteen full‐scale specimens that were manufactured with engineered wood products using computer numerically controlled technology were tested under monotonic loading. The initial stiffnesses and moment carrying capacities of joints with different

A nonlinear flexural plastic hinge developing at the base of the cantilever wall changes its dynamic properties. In such systems, contribution of higher modes to the total shear force response after yielding may be underestimated when they are assumed to prone same or some nonlinearity as the first mode. In order to calculate the modal properties of a cantilever walls developing a plastic hinge at

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A simplified design procedure, for nonconventional multiple tuned mass damper (TMD) (NC‐MTMD) system, was proposed. This system entails targeted tuning of each TMD by considering several mechanical factors (e.g., seismic excitation, TMD mass, and location). Subsequently, all TMDs are tuned to their corresponding modes by a group of semi‐empirical design formulae based on previous theoretical studies

A precast concrete wall with vertical energy‐dissipating connection (PCWVEC) was proposed in which X‐shaped metal dampers (XMD) with better energy‐dissipating capacity were installed along the vertical connections between precast wall panels, and the pore‐forming grouted lap‐sliced connector was adopted for the longitudinal steel bars between wall panels and floors. Lateral cyclic loading tests were

This paper presents the results of evaluating the effects of the location and size of rectangular opening on the cyclic performance of steel plate shear wall (SPSW) systems through an experimental study. A total of seven 1:6 scale SPSW specimens were tested under quasi‐static cyclic loads. Apart from a solid (without opening) specimen, six specimens with different opening locations and sizes were considered

Nonlinear time history analysis (NTHA) is widely considered to be the most accurate and robust method of seismic analysis and, when performed with force analogy method (FAM), can result in significant reduction in computational time, as compared to the conventional displacement‐based finite element (FE) solution technique. Taking this advantage of efficient FAM, this paper investigates the effects

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