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首页> 外文期刊>Bulletin of earthquake engineering >Limit states of modern unreinforced clay brick masonry walls subjected to in-plane loading
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Limit states of modern unreinforced clay brick masonry walls subjected to in-plane loading

机译：平面内受力的现代无筋粘土砖砌体墙的极限状态

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摘要

Recent research showed that the in-plane horizontal displacement capacity of unreinforced masonry (URM) walls depends on numerous factors that are not yet captured by current empirical drift capacity models; e.g., axial stress, shear span, geometry of the walls and the material used. In order to improve the performance-based assessment of URM wall buildings, future research should aim at developing numerical and mechanical models that link the global force-displacement response of URM walls to local deformation measures such as strains. This paper addresses the behaviour of modern clay brick masonry and makes first contributions to such an endeavour by the evaluation of experimental results: first, two sets of limit states are proposed that link local damage limit states to characteristic points of the global force-displacement response of the URM wall. The two sets define limit states for walls developing a shear or a flexural mechanism respectively. Second, local deformation measures deemed suitable for the characterisation of these limit states are evaluated from optical measurement data of quasi-static cyclic wall tests. These include strains, compression zone depth and the ratio of shear to flexural deformations.
机译：最近的研究表明，无筋砌体（URM）墙的平面内水平位移能力取决于当前经验位移能力模型尚未捕捉到的许多因素。例如，轴向应力，剪切跨度，壁的几何形状和所用材料。为了改进基于性能的URM墙体建筑评估，未来的研究应致力于开发将URM墙体的整体力-位移响应与局部变形量度（例如应变）联系起来的数值模型和力学模型。本文探讨了现代粘土砖砌体的行为，并通过评估实验结果对此做出了第一贡献：首先，提出了两组极限状态，这些极限状态将局部破坏极限状态与整体力-位移响应的特征点联系起来URM墙。两组分别定义了产生剪力或挠曲机制的墙的极限状态。其次，从准静态循环壁测试的光学测量数据中评估适合于表征这些极限状态的局部变形测量。其中包括应变，压缩区深度以及剪切变形与弯曲变形的比率。

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