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Flexural behavior of curved steel-plate composite (SC) walls under combined axial compression and cyclic lateral force
Engineering Structures ( IF 5.5 ) Pub Date : 2021-08-05 , DOI: 10.1016/j.engstruct.2021.112919
Neng Wang , Feng Zhou , Yunguang Qu , Zhengyu Xu , Zhongcheng Li , Fan Wang

The curved steel-plate composite (SC) walls, commonly used in nuclear power plants have not been adequately investigated. This paper aims at the curvature effects on the in-plane and out-of-plane flexural behavior of SC walls with consideration of axial compression. Eight specimens were tested under combined constant axial compression force and cyclic lateral force. The failure modes, moment-drift responses, ductility, stiffness degradation, ductility and energy dissipation are reported. Finite element (FE) models using ABAQUS were established and benchmarked with test results. Results show that the curvature effect on the structural behavior of curved SC wall is insignificant. For the flexural capacities of curved SC walls with T/R ratios no more than 0.5, negligible influential factors λ due to the curvature effect are seen. For the SC walls subjected to in-plane loading, −6.9% ≤ λIP ≤ 0.0% and when under out-of-plane loading, −6.9% ≤ λOP ≤ 6.0%. The plastic in-plane and out-of-plane flexural capacities of flat SC walls considering the axial compression were derived. To modify the proposed equations and determine their limitations, a parametric study was carried out in terms of the parameters including material grades of steel and concrete, reinforcement ratios, axial compression ratios.



中文翻译:

弯曲钢板复合(SC)墙在轴向压缩和循环侧向力联合作用下的弯曲行为

核电站中常用的弯曲钢板复合材料 (SC) 墙尚未得到充分研究。本文旨在考虑轴向压缩对 SC 墙的平面内和平面外弯曲行为的曲率影响。在组合恒定轴向压缩力和循环侧向力下测试了八个试样。报告了失效模式、力矩漂移响应、延展性、刚度退化、延展性和能量耗散。使用 ABAQUS 建立有限元 (FE) 模型并以测试结果为基准。结果表明,曲率对弯曲SC壁的结构行为的影响不显着。对于T/R比不超过 0.5的弯曲 SC 墙的抗弯能力,影响因素λ可忽略不计由于曲率效应可见。对于承受面内载荷的 SC 墙,-6.9% ≤ λ IP  ≤ 0.0%,在面外载荷下,-6.9% ≤ λ OP  ≤ 6.0%。推导出考虑轴向压缩的平面 SC 壁的塑性平面内和平面外弯曲能力。为了修改所提出的方程并确定它们的局限性,就包括钢和混凝土的材料等级、配筋率、轴压比在内的参数进行了参数研究。

更新日期:2021-08-05
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