摘要
为提高梁式桥的抗震性能,减少落梁震害的出现,利用高效吸能合金钢这种延伸率高达68%、断裂强度高达564 MPa的新型航天材料,研发一种新型耗能限位装置。首先,对组成该装置的高效吸能合金钢拉杆及波纹钢管的力学性能进行有限元分析及试验研究,分析各设计参数对其力学性能的影响。然后设计并制作高效吸能合金钢耗能限位装置试验件,进行拟静力试验。最后将该装置应用于一座三跨简支梁桥,分析其对桥梁地震响应的影响。根据有限元计算与试验研究结果,高效吸能合金钢耗能限位装置滞回曲线为滑动的纺锤形,整体形状较为饱满,具有较好的耗能能力。该装置在地震作用下能滞回耗能,将台梁及墩梁相对位移降低至少50%,避免了梁台及梁梁碰撞的发生,起到了防碰撞防落梁的效果。
Here,to improve the seismic performance of beam bridges and reduce occurrence of earthquake damage caused by falling beams,a new energy-absorbing restrainer was developed by using high-efficiency energy-absorbing alloy steel,a new aerospace material with an elongation rate of 68% and a fracture strength of 564 MPa.Firstly,mechanical properties of high-efficiency energy-absorbing alloy steel bar and corrugated steel pipe as restrainer’s components were studied with finite element analysis and test study,and effects of various design parameters on their mechanical properties were analyzed.Then,a test piece of high-efficiency energy-absorbing alloy steel energy dissipation restrainer were designed and manufactured,and its pseudo-static test were conducted.Finally,the restrainer was applied in a 3-span simply supported beam bridge to analyze its effects on seismic response of the bridge.The results of finite element calculation and test study showed that the hysteretic curve of this restrainer is a sliding spindle shape,and its overall shape is relatively full with good energy consumption capacity;the restrainer can consume energy in hysteretic way under action of earthquake,reduce the relative displacement of platform beam and pier beam by at least 50%,avoid occurrence of beam-platform and beam-beam collision,and have the effect of anti-unseating and anti-collision.
作者
魏思斯
耿波
杨德举
何沛建
郑植
WEI Sisi;GENG Bo;YANG Deju;HE Peijian;ZHENG Zhi(State Key Laboratory of Bridge Engineering Structural Dynamics,China Merchants Chongqing Communications Research&Design Institute Co.,Ltd.,Chongqing 400067,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第21期190-200,共11页
Journal of Vibration and Shock
基金
国家自然科学基金重点项目(12032008)。
关键词
耗能限位装置
防落梁防碰撞
高效吸能合金钢
试验研究
有限元分析
energy-dissipating restrainer
anti-unseating and anti-collision
high efficiency energy-absorbing alloy steel
test study
finite element analysis