当前位置: X-MOL 学术Mech. Based Des. Struct. Mach. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Investigation of the interaction between concrete-gypsum interface and internal notch using experimental test and numerical simulation
Mechanics Based Design of Structures and Machines ( IF 3.9 ) Pub Date : 2021-01-07 , DOI: 10.1080/15397734.2020.1864639
Alireza Bagher Shemirani 1 , Hadi Haeri 2 , Vahab Sarfarazi 3 , Pouyan Ebneabbasi 4 , Mohammad Fatehi Marji 5
Affiliation  

Abstract

The experimental and discrete element method was used to investigate the interaction between concrete-gypsum interface and internal notch. Gypsum and concrete semi-circular samples with diameter of 10 cm and height of 10 cm were prepared separately. Then one gypsum sample and one concrete sample was attached to each other with glue. The middle space between gypsum–concrete interface has not any glue so one joint was built in this space. The length of joints were 2 cm, 4 cm, and 6 cm. In experimental tests, the joint direction related to loading axis change from 0° to 90° with increment of 30°. Totally, 12 experimental tests were performed. In numerical tests, the joint direction related to loading axis change from 0° to 90° with increment of 15°. Totally, 21 numerical tests were simulated. This testing show that the failure process is mostly governed by the joint direction related to loading axis. The tensile strengths of specimens are related to the fracture pattern and failure mechanism of the discontinuities and gypsum–concrete interface direction. The tensile behavior of discontinuity is related to the number of induced tensile cracks which are increased by decreasing the joint length. The tensile strength of samples decreases by increasing joint length. Their value was minimum when joint angularities were 30° and 45°. Failure pattern and failure strength are similar in both of the experimental test and numerical simulation.



中文翻译:

利用试验和数值模拟研究混凝土-石膏界面与内部缺口的相互作用

摘要

实验和离散元方法被用来研究混凝土-石膏界面与内部缺口之间的相互作用。分别制备了直径为10 cm,高度为10 cm的石膏和混凝土半圆形样品。然后,用胶水将1个石膏样品和1个混凝土样品粘合在一起。石膏-混凝土界面之间的中间空间没有胶水,因此在该空间中建立了一个关节。关节的长度分别为2 cm,4 cm和6 cm。在实验测试中,与载荷轴有关的关节方向从0°变为90°,增量为30°。总共进行了12个实验测试。在数值测试中,与加载轴相关的关节方向从0°变为90°,增量为15°。总共模拟了21个数值测试。该测试表明,失效过程主要受与载荷轴有关的关节方向支配。试样的拉伸强度与不连续的断裂模式和破坏机理以及石膏-混凝土界面方向有关。不连续的拉伸行为与所引起的拉伸裂纹的数量有关,拉伸裂纹的数量通过减小接头长度而增加。样品的拉伸强度会随着接头长度的增加而降低。当关节角度分别为30°和45°时,它们的值最小。在实验测试和数值模拟中,破坏模式和破坏强度都相似。不连续的拉伸行为与所引起的拉伸裂纹的数量有关,拉伸裂纹的数量通过减小接头长度而增加。样品的拉伸强度会随着接头长度的增加而降低。当关节角度分别为30°和45°时,它们的值最小。在实验测试和数值模拟中,破坏模式和破坏强度都相似。不连续的拉伸行为与所引起的拉伸裂纹的数量有关,拉伸裂纹的数量通过减小接头长度而增加。样品的拉伸强度会随着接头长度的增加而降低。当关节角度分别为30°和45°时,它们的值最小。在实验测试和数值模拟中,破坏模式和破坏强度都相似。

更新日期:2021-01-07
down
wechat
bug