A SIMPLIFIED ANALYTICAL PROCEDURE FOR SEISMIC ANALYSIS OF TIMBER LIGHT-FRAME SHEAR WALLS

G. Di Gangi, G. Monti, G. Quaranta, M. Vailati, C. Demartino
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Abstract

The seismic performance of timber light-frame shear walls is investigated in this paper with a focus on energy dissipation and ductility ensured by sheathing-to-framing connections. An original parametric finite element model has been developed in order to perform sensitivity analyses. The model considers the design variables affecting the racking load-carrying capacity of the wall. These variables include aspect ratio (height-to-width ratio), fastener spacing, number of vertical studs and framing elements cross-section size. A failure criterion has been defined based on the observation of both the global behaviour of the wall and local behaviour of fasteners in order to identify the ultimate displacement of the wall. The equivalent viscous damping has been numerically assessed by estimating the damping factor which is in use in the capacity spectrum method. Finally, an in-depth analysis of the results obtained from the sensitivity analyses led to the development of a simplified analytical procedure which is able to predict the capacity curve of a timber light-frame shear wall.
木结构轻框架剪力墙抗震分析的简化分析程序
本文研究了木质轻框架剪力墙的抗震性能,重点研究了护套与框架连接所保证的耗能和延性。为了进行灵敏度分析,建立了一个原始的参数有限元模型。该模型考虑了影响墙体货架承载能力的设计变量。这些变量包括长宽比(高宽比)、紧固件间距、垂直螺柱数量和框架元件截面尺寸。为了确定墙体的极限位移,在观察墙体整体行为和紧固件局部行为的基础上定义了一个失效准则。通过估计容量谱法中的阻尼系数,对等效粘性阻尼进行了数值计算。最后,通过对敏感性分析结果的深入分析,开发了一种简化的分析程序,该程序能够预测轻型木结构剪力墙的承载力曲线。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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