Reinforced concrete squat shear walls (RCSSWs) are structural elements commonly used in low-rise buildings and as bridge pier-walls and building basement walls. RCSSWs lateral in-plane failure modes are diagonal tension, diagonal compression, and sliding shear, where all are shear dominant. Determination of these failure modes is especially required for seismic design and evaluation of RCSSWs. A new procedure for such determination is introduced based on modeling the wall as a two-dimensional cracked reinforced concrete element modeled using the disturbed stress field model. This procedure considers the stress states of concrete and main rebars according to the shear dominant lateral nature of each failure mode of RCSSWs. The main stress-related behavioral indicators and their selected thresholds are presented. The accuracy and robustness of the proposed failure mode determination procedure is tested against 12 experimental cyclic test results. High accuracy and robustness are observed for determining different lateral in-plane failure modes of RCSSWs.

中文翻译：

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一种确定钢筋混凝土矮剪力墙横向面内破坏模式的新程序

钢筋混凝土矮剪力墙 (RCSSW) 是低层建筑中常用的结构元件，也用作桥梁墩墙和建筑地下室墙。RCSSW 的横向面内破坏模式是对角拉伸、对角压缩和滑动剪切，其中所有模式都以剪切为主。对于 RCSSW 的抗震设计和评估，尤其需要确定这些失效模式。基于将墙建模为使用扰动应力场模型建模的二维开裂钢筋混凝土元素，引入了用于此类确定的新程序。该程序根据 RCSSW 的每种破坏模式的剪切主导横向性质考虑混凝土和主钢筋的应力状态。介绍了主要的压力相关行为指标及其选定的阈值。建议的故障模式确定程序的准确性和稳健性根据 12 个实验循环测试结果进行了测试。在确定 RCSSW 的不同横向平面内故障模式时，观察到了高精度和鲁棒性。