Non-linear analysis of RC masonry-infilled frames using the SLaMA method: part 1—mechanical interpretation of the infill/frame interaction and formulation of the procedure
Non-linear analysis of RC masonry-infilled frames using the SLaMA method: part 1—mechanical interpretation of the infill/frame interaction and formulation of the procedure
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DOI：
10.1007/s10518-019-00580-w
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发表时间：
2019-02
影响因子：
4.6
通讯作者：
R. Gentile;S. Pampanin;D. Raffaele;G. Uva
中科院分区：
文献类型：
--
作者：
R. Gentile;S. Pampanin;D. Raffaele;G. Uva
简单侧向机理分析（SLaMA）是一种分析钢筋混凝土（RC）框架、悬臂墙或框架-墙结构体系的力-位移承载力曲线的方法。该方法的当前版本在2017年新西兰地震评估指南中提出（新西兰地震工程学会的NZSEE，现有建筑物的地震评估-工程评估技术指南，惠灵顿，2017年）。关于框架结构，填充墙的可能影响目前被认为是局部的钢筋混凝土构件的检查。然而，众所周知，填充物对框架的整体能力曲线有重大影响。本文提出了一种考虑填充物对框架整体力-位移曲线影响的SLaMA方法，该方法不需要任何数值算法。扩展的SLaMA方法在这里正式化，它是通过广泛的参数分析在配套文件（第2部分）中进行验证。扩展的SLaMA基于单独计算框架和填充物的基底剪力贡献的可能性，进而基于整体平衡考虑。这样的考虑也允许定义一个新的程序后处理的推覆或时程分析的结果，填充物被建模为对角支柱，或解释实验测试。这允许在一个单一的数值分析中，解耦框架和填充物对基底剪切承载力的贡献。本文以一个理想的两层单跨砌体填充框架为例，分析了不同填充结构的解耦过程。
The simple lateral mechanism analysis (SLaMA) is an analytical method to assess the force–displacement capacity curve of Reinforced Concrete (RC) structures composed of frames, cantilever walls or dual wall/frame systems. The current version of the method was proposed in the 2017 New Zealand guidelines for the seismic assessment (NZSEE in New Zealand Society for Earthquake Engineering, the seismic assessment of existing buildings—technical guidelines for engineering assessments, Wellington, 2017). Regarding frame structures, the possible influence of infill walls is currently considered locally with checks on the RC members. However, it is universally known that infills have a major effect on the global capacity curve of the frame. In this paper, a comprehensive SLaMA method for infilled frames is proposed, which allows considering the influence of the infills on the global force–displacement curve without any numerical algorithm. The extended SLaMA method is herein formalised and it is validated in a companion paper (part 2) through an extensive parametric analysis. The extended SLaMA is based on the possibility to separately calculate the base shear contributions of the frame and the infills, in turn based on global equilibrium considerations. Such considerations also allow defining a novel procedure to post-process the results of pushover or time-history analyses where infills are modelled as diagonal struts, or to interpret experimental tests. This allows, within a single numerical analysis, to decouple the frame and infills contributions to the base-shear capacity. The decoupling procedure is herein demonstrated for an ideal two-storey, one-bay masonry-infilled frame with different infills configurations.