摘要
基于性能试验,研究了一种新型多功能复摩擦支座(multifunctional double friction pendulum bearing,MDFPB)的滞回特性。首先,研制了用于MDFPB的NiTi记忆合金(NiTi shape memory alloy)拉索。在此基础上,设计并制作了MDFPB试件,对其进行了拟静力试验研究,分别考察了竖向压力、位移幅值和加载频率对MDFPB的恢复力-位移滞回曲线以及等效刚度、单位循环耗能、等效阻尼比和等效动摩擦系数的影响。研究结果表明:MDFPB的耗能能力优良,且具有明显的自适应能力;此新型球面滑动隔震支座在各种试验条件下展现出颇为类似的非线性恢复力曲线和稳定的力学性能。
Based on performance experiment investigation,hysteretic properties of an innovative isolator called multifunctional double friction pendulum bearing(MDFPB)was researched.First,superelastic NiTi shale memory alloy(SMA)cables for MDFPB were developed.Then,the MDFPB specimen was designed and fabricated.Finally,quasi-static tests on the MDFPB specimen under different loading conditions were conducted to study the influence of displacement amplitude vertical load,and loading frequency on the hysteretic curves and the mechanical parameters,such as equivalent stiffness,energy dissipation per cycle,equivalent damping ratio and equivalent kinetic friction coefficient.The experimental results show that the MDFPB provides full hysteretic curves,excellent energy dissipation capacity,and evident adaptability.In addition,the new spherical sliding isolator exhibits quite similar nonlinear restoring force curves under various loading conditions and have stable mechanical behavior.
作者
庄鹏
徐蒙
韩淼
ZHUANG Peng;XU Meng;HAN Miao(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《施工技术》
CAS
2020年第S01期1606-1611,共6页
Construction Technology
基金
北京市自然科学基金资助项目(8182016)
北京建筑大学北京未来城市设计高精尖创新中心资助项目(UDC2016030200)
关键词
球面滑动摩擦隔震支座
复摩擦摆支座
形状记忆合金拉索
滞回性能
拟静力试验
spherical sliding friction isolation bearing
double friction pendulum bearing
shape memory alloy cable
hysteretic performance
quasi-static test
