带扩孔螺栓连接型消能梁段的Y形偏心支撑结构抗震性能研究

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摘要地震作用下，Y形偏心支撑结构需有效增大消能梁段的延性和耗能能力、减小消能梁段的变形，以使其满足“多遇地震、设防地震下无损伤，罕遇地震下损伤较小且震后功能可快速修复”的抗震设防目标。基于短剪切型消能梁段和剪切扩孔型螺栓连接的力学性能，提出一种用于Y形偏心支撑结构中的新型扩孔螺栓连接型消能梁段；采用校正的数值仿真分析法对短剪切型消能梁段、剪切扩孔型螺栓连接、扩孔螺栓连接型消能梁段进行研究，以明确扩孔螺栓连接型消能梁段的力学性能和耗能模式。经对某合理设计的带扩孔螺栓连接型消能梁段的Y形偏心支撑结构分析表明，多遇地震和设防地震下消能梁段无明显变形和损伤，罕遇地震下通过剪切扩孔型螺栓连接和短剪切型消能梁段双重耗能机制，有效提高偏心支撑结构的抗震性能和减小消能梁段的损伤，为偏心支撑结构的抗震设计提供新的思路和方法。

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	胡淑军1
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	王雪飞4
	熊进刚1
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	曾思智1
	4

关键词 ： Y形偏心支撑结构(Y-EBFs), 扩孔螺栓连接型消能梁段(SSL-SSBC), 抗震性能, 力学性能, 震后功能可恢复

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.

Key words： Y-shaped eccentrically braced frames (Y-EBFs) short shear link with shear slotted bolted connection (SSL-SSBC) seismic performance mechanical property seismic resilience capacity

收稿日期: 2019-03-28 出版日期: 2020-08-15

引用本文:

胡淑军1,2,3，王雪飞4，熊进刚1,2，曾思智1,4. 带扩孔螺栓连接型消能梁段的Y形偏心支撑结构抗震性能研究[J]. 振动与冲击, 2020, 39(16): 205-213.
HU Shujun1,2,3,WANG Xuefei4,XIONG Jingang1,2,ZENG Sizhi1,4. Seismic performance analysis of Y-shaped eccentrically braced frames with SSL-SSBC. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(16): 205-213.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I16/205

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