摘要
震后功能可快速恢复成为地震工程领域的研究前沿。该文基于损伤控制的思想,提出一种震后功能可快速恢复的联肢剪力墙,由低损伤墙肢和可更换连梁组成。在强烈地震作用下,低损伤墙肢无损坏或轻微损坏,可更换连梁耗散地震能量,震后可通过更换连梁中的消能梁段(或阻尼器)而实现快速修复。试验研究表明,钢管-双层钢板-混凝土组合剪力墙的承载力高,压弯破坏时极限变形能力达1/33,远大于钢筋混凝土剪力墙的变形能力;在1/100位移角时,钢管-双层钢板-混凝土组合剪力墙轻微损坏,可作为低损伤墙肢。该文中可更换钢连梁由中部的消能梁段和两端的非消能梁段组成,大尺寸试件的拟静力试验表明,往复剪切作用下连梁的塑性变形和损伤集中在中部的消能梁段,可更换钢连梁的塑性转角可达0.06 rad,滞回曲线饱满、稳定,通过合理设计连接节点可实现强震后方便更换消能梁段。
Earthquake resilience has emerged as concept of damage control, this paper proposes one of the frontiers of earthquake engineering. Based on the a type of earthquake-resilient coupled shear wall, which is composed of low-damage wall piers and replaceable coupling beams. When subjected to strong motions, the low-damage wall piers experience limited damage or even are damage free. The replaceable coupling beams are able to dissipate seismic energy during earthquake event and recover quickly by replacing the damaged ＇fuse＇ shear links or dampers. Experimental testing results indicate that the steel tube-double steel plate-concrete composite wall has high strength capacity. The ultimate drift ratio of the slender composite wall reaches 1/33, significantly larger than the deformation capacity of reinforced concrete （RC） walls. At the drift ratio of 1/100, the composite wall has limited damage and, therefore, it can be used as a type of low-damage wall piers. The replaceable steel coupling beam presented in this paper consists of a central ＇fuse＇ shear link, connecting to normal steel segments at its two ends. The quasi-static test on a large-scale specimen indicates that inelastic deformation and damage are concentrated in the ＇fuse＇ shear link when the coupling beam is subjected to shear reversals. The replaceable coupling beam shows large deformation and energy dissipation capacity, with the ultimate inelastic rotation of 0.06 rad. With the reasonable design for the connection between the shear link and normal beam segments, the ＇fuse＇ shear link can be replaced readily after being damaged during severe earthquakes.
出处
《工程力学》
EI
CSCD
北大核心
2015年第10期1-8,共8页
Engineering Mechanics
基金
国家国际科技合作专项项目(2014DFA70950)
清华大学自主科研项目(2012THZ02-1)
国家自然科学基金项目(91315301)
关键词
震后功能可快速恢复
联肢剪力墙
低损伤墙肢
可更换连梁
抗震性能
earthquake resilience
coupled shear wall
low-damage wall pier
replaceable coupling beam
seismic behavior
