摘要
研发了一种新型自复位滑移摩擦隔震支座,该支座竖向支承和水平复位元件相互独立分离,摩擦耗能和自复位功能分别由刚性滑块和弹性橡胶完成。阐述了该支座基本构造及工作原理,提出并检验了该型支座的理论恢复力模型。设计并制作了3层装配式钢框架足尺模型,选用2条天然波及1条人工波,对基础隔震及非隔震结构进行7度(0.15g)多遇、设防及罕遇地震的地震模拟振动台试验。结果表明:新型支座的各组成部分本构关系独立明确、传力路径清晰,便于组装更换;采用该支座的隔震结构在各水准地震作用下的地震反应明显小于非隔震结构,隔震效果随试验地震动峰值加速度的增大而趋于显著;隔震层滞回曲线饱满,可有效吸收耗散地震能量,各支座始终保持较好的竖向稳定性,未出现倾覆提离现象,震后结构隔震层复位良好。
Here,a new type self-resetting sliding friction isolation bearing was developed.The bearing’s vertical support and horizontal reset elements were independently separated from each other.Its friction energy dissipation and self-resetting functions were completed by rigid slider and elastic rubber,respectively.The basic structure and working principle of the bearing were described,and its theoretical restoring force model was proposed and tested.A full-scale model of 3-story prefabricated steel frame was designed and fabricated.Adopting 2 natural waves and 1 artificial wave,shaking table test of seismic simulations were conducted for both base-isolated and non-base-isolated structures under 7°(0.15 g),frequent,fortified,and rare earthquakes.The results showed that constitutive relations of various components of the bearing are independent,clear and definite,their force transmission paths are limpid,so these components are easy to assemble and replace;seismic responses of isolated structures using this bearing under earthquakes of various levels are significantly smaller than those of non-isolated structures,their isolation effect tends to be significant with increase in test ground motion peak acceleration;hysteretic curves of isolation layers are full to effectively absorb dissipated seismic energy;various bearings always keep better vertical stability without overturning and lifting off;after earthquake,structural isolation layer is well reset.
作者
李武杰
赖正聪
封云龙
白羽
周立超
张田庆
LI Wujie;LAI Zhengcong;FENG Yunlong;BAI Yu;ZHOU Lichao;ZHANG Tianqing(School of Architectural Engineering,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Earthquake Engineering Research Center,Kunming 650500,China;China Construction Second Engineering Bureau Co.,Ltd.,Kunming 650000,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第15期108-117,181,共11页
Journal of Vibration and Shock
基金
云南省重点研发专项(202003AC100001)。
关键词
基础隔震
滑移摩擦支座
自复位
足尺模型
地震模拟振动台试验
base-isolated
sliding friction bearing
self-reset
full-scale model
shaking table test of seismic simulation
