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Nonlinear Modeling of the Post Peak Degradation of Nonstructural Components in Light Frame Structural Systems

机译：轻框架结构系统中非结构部件峰后降解的非线性建模

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The research presented herein describes the findings and conclusions thus far in an experimental and analytical study of the behavior of woodframe shear walls sheathed with OSB combined with drywall and/or stucco subjected to cyclic loading. Eight, 8 ft square shear wall specimens were constructed and tested using the CUREE-Caltech pseudo-static loading protocol (Krawinkler, et al., 2001). A total of four different configurations were investigated to quantify the performance characteristics of conventional woodframe shear walls sheathed with OSB finished with either drywall and/or stucco.Currently, ASCE 41 (2006) provisions suggest no increase in capacity, nor difference in acceptance criteria for plywood sheathed walls clad with non-structural finishes (drywall and/or stucco) citing that stucco/drywall are brittle and fail at low levels of seismicity. However, data collected from research conducted as part of an ongoing study show that there are large differences in the backbone curves. Furthermore, using the Type 1 curve (as put forth by FEMA 356/ASCE 41) for establishing the acceptance criteria of ductile subassemblies may not be a good match for the recorded data from wood sheathed walls (both with/without cladding of drywall/stucco). Lastly, when a Type 1 component behavior is fit to test data consistent with the ASCE 41 Alternative Modeling Parameters and Acceptance Criterion, the suggested Life Safety and Collapse Prevention acceptance criteria vary greatly for each of the four configurations tested.
机译：本文介绍的研究描述了迄今为止的实验结果和分析结果，这些实验和分析研究是用OSB覆以干墙和/或灰泥的木结构剪力墙，承受周期性荷载。使用CUREE-Caltech拟静力加载协议（Krawinkler等，2001）构建并测试了8个8平方英尺的剪力墙标本。总共研究了四种不同的配置，以量化用干墙和/或灰泥饰面的OSB护套的常规木构剪力墙的性能特征。 目前，ASCE 41（2006）的规定表明，无结构饰面（干墙和/或灰泥）的胶合板护套墙的容量没有增加，也没有接受标准的差异，理由是灰泥/干墙易碎并且在低地震等级下会失效。但是，作为正在进行的研究的一部分，从研究中收集的数据表明，主干曲线存在很大差异。此外，使用类型1曲线（由FEMA 356 / ASCE 41提出）来确定延性子组件的接受标准可能与木套墙（带/不带干墙/灰泥覆层）的记录数据不太匹配。 ）。最后，当符合ASCE 41替代建模参数和验收标准的类型1组件行为适合于测试数据时，建议的生命安全和防塌倒验收标准对于所测试的四种配置中的每一种都有很大差异。

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