IDENTIFICATION OF SHEAR MECHANICAL PARAMETERS OF MASONRY PIERS FROM DIAGONAL COMPRESSION TEST
IDENTIFICATION OF SHEAR MECHANICAL PARAMETERS OF MASONRY PIERS FROM DIAGONAL COMPRESSION TEST
复制标题
基于斜压试验识别砌体桥墩剪力力学参数
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
S. Lagomarsino
中科院分区：
文献类型：
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作者：
C. Calderini;S. Cattari;S. Lagomarsino
在普通砌体建筑的抗震设计和评估中，面内横向力作用下砌体桥墩强度的预测起着至关重要的作用。文献和规范中存在不同的简化模型来描述桥墩的失效模式（摇摆/破碎、床缝滑动、对角开裂）并预测其承载能力。一般来说，它们基于通过很少的机械参数对砌体极限强度域的简单理想化。特别是对角裂纹失效模式，通常采用两种模型：Turnšek 和 Čačovič (1970) 的模型以及 Mann 和 Müller (1980) 的模型。这些模型取决于两个主要力学参数：砂浆接缝的内聚力（通常通过三重试验获得）和砌体的抗拉强度（通常通过对角压缩试验获得）。本文的目的是综合分析这些参数的物理意义、实验评价和正确使用。此外，还提出了一种将对角线压缩测试的结果与内聚力的“平均值”相关联的方法。后一种测试具有两个主要优点：适用于不同类型的砌体（也包括不规则的砌体）；提供代表整个砌体的“平均”机械参数的能力。
In the seismic design and assessment of ordinary masonry buildings the prediction of the strength of masonry piers subject to in-plane lateral forces plays a crucial role. Different simplified models are present in literature and codes to describe the failure modes of piers (Rocking/Crushing, Bed Joint Sliding, Diagonal Cracking) and to predict their load bearing capacity. In general, they are based on simple idealizations of the limit strength domain of masonry through few mechanical parameters. Referring in particular to the Diagonal Cracking failure mode, two models are usually adopted: that of Turnšek and Čačovič (1970) and that of Mann and Müller (1980). These models are dependent on two main mechanical parameters: the cohesion of mortar joints, usually obtained through the triplet test, and the tensile strength of masonry, usually derived by the diagonal compression test. Aim of this paper is to synthetically analyse the physical meaning, the experimental evaluation and the proper use of these parameters. Moreover, a method to relate the result of the diagonal compression test to a “mean” value of the cohesion is proposed. This latter test offers two main advantages: a versatile application to different types of masonry (also irregular ones); the capability of providing “mean” mechanical parameters, representative of the whole masonry.