Modeling Hysteretic Behavior of Wood Shear Walls with a Protocol-Independent Nail Connection Algorithm
Modeling Hysteretic Behavior of Wood Shear Walls with a Protocol-Independent Nail Connection Algorithm
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DOI：
10.1061/(asce)st.1943-541x.0000438
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Minghao Li;R. Foschi;F. Lam
中科院分区：
文献类型：
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作者：
Minghao Li;R. Foschi;F. Lam
本文提出了一种称为HYST的算法的扩展，以开发钉连接的滞后特性。本文还讨论了该算法在一个称为WALL2D的木剪力墙有限元模型中的实现，以研究墙的滞后响应。HYST算法是一种独立于协议和基于力学的程序，它将钉柄视为钢梁单元，将木材嵌入介质视为沿钉柄涂抹的仅压缩弹簧单元。通过考虑循环荷载作用下木材嵌入介质的刚度退化，HYST可以充分解决典型钉连接迟滞中的强度/刚度退化和夹紧效应。HYST通过两种不同加载方案下钉连接的荷载-滑移滞回进行了验证。WALL2D应用模型由用于框架构件的线弹性梁单元、用于护套板的正交各向异性板单元、用于框架连接的线性弹簧组成。
This paper presents an extension to an algorithm called HYST to develop the hysteresis characteristics of a nail connection. The paper also discusses the implementation of the algorithm in a finite-element model of a wood shear wall, called WALL2D, to study the hysteretic wall response. The HYST algorithm is a protocol-independent and mechanics-based procedure that considers the nail shank as steel beam elements and the wood embedment medium as compression-only spring elements smeared along the nail shank. By accounting for the stiffness degradation of the wood embedment medium under cyclic loading, HYST can fully address strength/stiffness degradation and the pinching effect in the hysteresis of typical nail connections. HYST was verified by the load-slip hystereses from nail connections tested with two different loading protocols. The WALL2D application model consists of linear elastic beam elements for framing members, orthotropic plate elements for sheathing panels, linear springs for framing connecti...