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首页> 外文期刊>Bulletin of earthquake engineering >A model for pushover analysis of confined masonry structures: implementation and validation
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A model for pushover analysis of confined masonry structures: implementation and validation

机译：承压砌体结构推覆分析模型：实施与验证

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Confined masonry (CM) is a typical building technique in Latin American countries. This technique, due to its simplicity of construction and similarity with traditional practices of reinforced concrete building, presents a potential of use in European regions with moderate-to-high seismicity. However, most of the procedures for seismic design in codes for Latin America are force-based, which appears to be inadequate due to the high dissipative response observed for CM. This paper presents a simplified numerical-analytical approach to model CM structures using pushover analysis, aiming to apply performancebased design procedures. First, a data mining process is performed on a database of experimental results collected from lateral tests on CM walls to adjust prediction models for the wall shear strength and to determine the input relevance through a sensitivity analysis. Then, an analytical model of CM structures for pushover analysis is proposed with basis on a wide-column approach that employs an adaptive shear load-displacement constitutive relation. The proposed method is compared with a discrete element model that represents explicitly the confinements-masonry interaction, against the experimental results obtained in a quasi-static test of a full-scale tridimensional CM structure. The accuracy of the predictions from both methods is very satisfactory, allowing to capture the base sheardisplacement envelope and also the damage patterns of the structure, thus, demonstrating the ability of themethods to be used in performance-based seismic assessment and design ofCM buildings.
机译：密闭砖石（CM）是拉丁美洲国家/地区的典型建筑技术。由于该技术结构简单且与钢筋混凝土建筑的传统做法相似，因此该技术在具有中等至高地震烈度的欧洲地区具有使用潜力。但是，拉丁美洲法规中的大多数地震设计程序都是基于力的，由于对CM的高耗散响应，这似乎是不充分的。本文提出了一种简化的数值分析方法，用于使用推覆分析对CM结构进行建模，旨在应用基于性能的设计程序。首先，对从CM壁的横向测试收集的实验结果的数据库执行数据挖掘过程，以调整壁抗剪强度的预测模型并通过敏感性分析确定输入相关性。然后，基于采用自适应剪力-位移-本构关系的宽柱法，提出了一种用于推覆分析的CM结构分析模型。将所提出的方法与离散元素模型进行比较，该模型明确表示了约束与砌体之间的相互作用，并与在全尺寸三维CM结构的准静态测试中获得的实验结果进行了比较。两种方法的预测准确性都非常令人满意，可以捕获基本的剪切位移包络线以及结构的损伤模式，从而证明了该方法在基于性能的地震评估和CM建筑物设计中使用的能力。

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