Cyclic experiments on isolated steel sheet connections for CFS framed steel sheet sheathed shear walls with new configurations
Cyclic experiments on isolated steel sheet connections for CFS framed steel sheet sheathed shear walls with new configurations
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新构型CFS框架钢板剪力墙孤立钢板连接循环试验
DOI：
10.1016/j.engstruct.2021.112805
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发表时间：
2021
影响因子：
5.5
通讯作者：
Schafer, Benjamin W.
中科院分区：
文献类型：
--
作者：
Zhang, Zhidong;Singh, Amanpreet;Derveni, Fani;Torabian, Shahabeddin;Peterman, Kara D.;Hutchinson, Tara C.;Schafer, Benjamin W.
本研究的主要目的是实验表征性能的孤立的单护套框架紧固件连接循环荷载下使用的新兴类的冷弯型钢（CFS）框架钢板护套剪力墙用于抗震侧阻力。新的剪力墙变体包括使用夹在框架构件之间的钢板护套（即，中间层）和使用重型空心结构截面（HSS）弦杆构件，其中薄钢板护套通过动力致动紧固件（PAF）附接到HSS。钢板剪力墙框架与钢板扣件连接的循环非线性响应是模拟钢板剪力墙抗震性能的基础。对于这些新的配置，存在剪切下的最小循环疲劳水平测试数据。根据AISI S905设计了独特的搭接剪切试验，以研究和表征循环紧固件连接行为。试样加载与非对称循环加载协议，有意地在压缩方向上的薄板，并逐步增加在拉伸方向上。完成了63项测试，涵盖了各种框架厚度、板材厚度、紧固件类型和尺寸。每个连接配置的特点是一个多线性骨干曲线准备用于数值剪力墙模型。所测试的紧固件配置表现出优异的性能，因为在这些配置中紧固件倾斜在很大程度上或完全消除，并且使钢板屈曲引起的连接劣化最小化。它还表明，AISI S100连接强度规定适用于测试连接。
The main objective of this research is to experimentally characterize the performance of isolated single sheathing-to-framing fastener connections under cyclic load as utilized in emerging classes of cold-formed steel (CFS) framed steel sheet sheathed shear walls used for seismic lateral resistance. New shear wall variations include the use of steel sheet sheathing sandwiched between framing members (i.e., mid-ply) and the use of heavy hollow structural sections (HSS) chord members with the thin steel sheet sheathing attached by power actuated fasteners (PAF) to the HSS. The cyclic nonlinear response of the framing to steel sheet fastener connection is fundamental for simulating the seismic performance of steel sheet sheathed shear walls. Minimal cyclic fastener-level test data under shear exists for these new configurations. A unique lap shear test following AISI S905 was designed to study and characterize the cyclic fastener connection behavior. The specimens were loaded with an asymmetric cyclic loading protocol which intentionally buckles the thin sheet in the compression direction, and progressively increases in the tension direction. Sixty-three tests covering a wide range of framing thickness, sheet thickness, fastener type and size were completed. Each connection configuration is characterized with a multi-linear backbone curve ready for use in numerical shear wall models. The tested fastener configurations exhibit excellent performance as fastener tilting is largely or completely eliminated in these configurations, and connection degradation from buckling of the steel sheet is minimized. It is also shown that AISI S100 connection strength provisions are applicable to the tested connections.
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