不同规范反应谱对桥梁减隔震设计的影响  

Influence of Different Response Spectrum in Codes on Isolated Bridge Design

作　　者：李闯[1] 倪晓博[1] 叶爱君[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2013年第5期91-95,共5页Structural Engineers

摘　　要：结合一座常规桥梁,同时基于现行的两本桥梁抗震设计规范,对其常规体系和减隔震体系分别进行动力时程分析,来确定不同规范反应谱对桥梁减隔震设计的影响。研究表明,桥梁采用减隔震设计大幅降低了关键截面的地震反应;同时,由于两本规范反应谱的差异,基于这两本规范计算所得的结构地震反应也有较大悬殊,其中位移反应的差异更大。With current codes,seismic design of bridges were conducted using the time-history analyses for a bridge with seismic isolation and a bridge using regular bearings,respectively.The influences of seismic isolation on bridge design were studied.The study indicates that seismic responses in key locations are substantially decreasing by using seismic isolation.Meanwhile,structural responses are much different due to the different response spectra in two codes.The difference of displacement responses is much greater than that of the force responses.

关 键 词：桥梁 减隔震设计 常规体系 规范反应谱 时程分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]