摘要
为得出近断层高架桥在地震作用下的梁端碰撞响应规律及其最优减撞控制措施,本文对常规近断层连续高架桥纵向的梁-台碰撞响应规律进行了分析,并对常用减隔震装置的减撞效果进行了对比。分析结果表明:碰撞会减小固定墩的塑性铰发展程度,但会造成固定支座失效,且近断层高架桥在地震发生时碰撞力会更大,甚至有可能会造成固定墩的剪切破坏;增大间隙虽不能有效降低碰撞力,但可以降低固定支座剪力;采用阻尼器能够对近断层高架桥起到有效的减撞控制,但近断层高架桥不宜使用隔震措施。
To obtain the law of dynamic pounding response and the optimal seismic control measures of near-fault viaducts subjected to earthquakes,the girder-abutment pounding effect of near-fault viaducts suffering from earthquake inputs are studied and the seismic mitigation effect of common seismic control measures are discussed.The analysis results show that pounding can limit the plastic hinge of fixed piers and lead to shear failure of fixed bearings,and the pounding force of near-fault viaducts will be greater and even results in shear failure of the fixed abutment.Enlarging the gap of expansion joints can decrease the shear force of fixed bearings;however,it cannot efficiently reduce the pounding force.Dampers can be effective for the seismic pounding control of near-fault viaducts,but the isolated bearings are not suitable for near-fault viaducts.
作者
李勇
刘晶波
解梦飞
LI Yong;LIU Jingbo;XIE Mengfei(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第12期1947-1955,共9页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51508350
51478247
51508351)
河北省自然科学基金项目(E2016210087)
河北省高等学校青年拔尖人才计划项目(BJ2018048)
石家庄铁道大学优秀青年科学基金
河北省大型基础设施防灾减灾协同创新项目
关键词
近断层高架桥
碰撞
伸缩缝间隙
阻尼器
隔震支座
减撞控制
固定支座
塑性铰
near-fault viaduct
pounding
gap of expansion joint
dampers
seismic isolation measure
pounding control
fixed bearing
plastic hinge
