Behavior of cross-laminated timber diaphragm connections with self-tapping screws
Behavior of cross-laminated timber diaphragm connections with self-tapping screws
复制标题
使用自攻螺钉的交叉层压木材隔膜连接的性能
DOI：
10.1016/j.engstruct.2018.04.094
复制
发表时间：
2018
影响因子：
5.5
通讯作者：
Rakesh Gupta
中科院分区：
文献类型：
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作者：
K. Sullivan;T. Miller;Rakesh Gupta
对2.44 m(8 ft)长、直径8 mm和10 mm自攻螺钉的剪力节点进行了单调和循环试验，以确定节点的强度和刚度特性。本研究的目的是将抗震体系中交叉层合木(CLT)隔板连接的试验值与根据美国国家木结构设计规范和欧洲规范中的公式计算的设计值进行比较。了解和量化这些剪力连接的行为将使结构工程师在设计这些构件时更有信心，特别是在抗震系统方面。试验屈服强度(从荷载-挠度曲线上的屈服点)与因数设计强度的比率在2.1-6.1之间。在ASCE41-13验收标准分析中，循环试验中曲面花键连接的生命安全性能水平的m系数介于1.6至1.8之间，循环半搭接连接的m系数介于0.9至1.7之间。采用独特的角度和垂直螺钉组合的半搭接连接表现得非常好，既具有高的线弹性初始刚度，又具有延性的峰后行为。
Monotonic and cyclic tests were carried out to determine strength and stiffness characteristics of 2.44 m (8 ft) long shear connections with 8 mm and 10 mm diameter self-tapping screws. The goal of this research is to compare test values of cross-laminated timber (CLT) diaphragm connections in seismic force-resisting systems to the design values calculated from formulas in the National Design Specification for Wood Construction (USA) and the Eurocode. Understanding and quantifying the behavior of these shear connections will provide structural engineers with increased confidence in designing these components, especially with regard to the seismic force-resisting systems. Ratios of the experimental yield strength (from the yield point on the load-deflection curve) to factored design strength were in the range of 2.1–6.1. In the ASCE 41-13 acceptance criteria analysis, the m-factors for the Life Safety performance level in cyclic tests ranged from 1.6 to 1.8 for surface spline connections and from 0.9 to 1.7 for cyclic half-lap connections. The half-lap connections with a unique combination of angled and vertical screws performed exceptionally well with both high, linear elastic initial stiffness and ductile, post-peak behavior.