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| Seismic performance analysis of Y-shaped eccentrically braced frames with SSL-SSBC |
| HU Shujun1,2,3,WANG Xuefei4,XIONG Jingang1,2,ZENG Sizhi1,4 |
1.School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China;
2.Jiangxi Provincial Engineering Laboratory of Nearly Zero Energy Building, Nanchang 330031, China;
3.Zhongheng Construction Group Co., Ltd., Nanchang 330031, China;
4.Zhongmei Engineering Group Co., Ltd., Nanchang 330001, China |
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Abstract During major earthquake, ideal shear links in Y-shaped eccentrically braced frames (Y-EBFs) are necessary to dissipate higher seismic energy with higher ductility and less damage, so the Y-EBFs can better meet the four-level seismic fortification objective “no damage under minor and moderate earthquake, replaceable or repairable under major earthquake, and no collapse under mega earthquake”.In this paper, a new type of very short shear link with short slotted bolted connections (SSL-SSBC) in the Y-EBF was developed by combining with the mechanical property of very short shear link and the friction slip of shear slotted bolted connection (SSBC).Then the SSBC, very short shear link and corresponding SSL-SSBC were analyzed by using a verified numerical method under cyclic loading, and the mechanical performance and failure mode of SSL-SSBC can be obtained.In addition, this study also clearly identifies that no yielding or damage of vertical shear links in EBFs with SSL-SSBC is occurred during minor and moderate earthquakes, and the deformation and damage of vertical shear links in SSL-SSBC can be minimized due to its bolt friction slip during major earthquake.This work can provide a new way to give important seismic design reference for Y-EBFs.
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Received: 28 March 2019
Published: 15 August 2020
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