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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >A novel macroelement model for the nonlinear analysis of masonry buildings. Part 1: Axial and flexural behavior
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A novel macroelement model for the nonlinear analysis of masonry buildings. Part 1: Axial and flexural behavior

机译：砌体建筑非线性分析的一种新型宏观形态模型。 第1部分：轴向和弯曲行为

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In the numerical modelling of the nonlinear response of masonry buildings by equivalent-frame models based on macroelements representative of the in-plane response of structural members, it is important to correctly capture compressive behavior, lateral stiffness, and strength of the structure. The macroelement model currently implemented in the TREMURI computer program, thanks to the presence of nonlinear interfaces lumped at the element extremities, allows studying the coupled axial and in-plane bending response, with the inherent limitation of approximating the stiffness associated with at least one of these behaviors. The simplified compressive law does not capture the displacement accumulation during cyclic loads; moreover, second-order effects are not modelled. The article presents an improved macroelement model, able to simulate the in-plane cyclic response of masonry walls. The model overcomes some of the limitations of the currently available macroelement. As regards the compressive and flexural behavior, a new compressive law is introduced, together with a methodology to capture the correct flexural stiffness of the panel and to model the second-order effects. The improved model was then implemented in the TREMURI program and validations of the new features are shown, together with a simulation of an experimental test on a single wall characterized by flexural behavior. A companion article presents the shear formulation and shows the ability of the new macroelement of accurately predicting the nonlinear response of masonry structures at the building scale through the simulation of a larger number of experimental tests.
机译：在基于结构构件的面内响应的基于宏观的宏观重组的等效框架模型的数值建模，基于结构构件的面内响应，重要的是正确地捕获结构的压缩行为，横向刚度和强度。目前在Tremuri计算机程序中实现的宏观选择模型，由于在元件偏端处的存在非线性接口，允许研究耦合的轴向和面内弯曲响应，其具有近似与至少一个相关联的刚度的固有限制这些行为。简化的压缩法在环状负载期间不会捕获位移积累;此外，没有建模二阶效应。本文介绍了一种改进的宏观形型模型，能够模拟砌体墙壁的平面内循环响应。该模型克服了当前可用宏观的一些局限性。关于压缩和弯曲行为，引入了一种新的压缩法，以及一种方法，以捕获面板的正确弯曲刚度并模拟二阶效应。然后在TREMURI程序中实现改进的模型，并显示了新特征的验证，以及模拟在由弯曲行为为特征的单壁上进行实验测试。伴侣制品呈现剪切配方，并表明了新的宏观设计精确预测建筑规模在建筑规模的非线性响应的能力，通过模拟了更多的实验测试。

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