摘要
减震榫与榫形防落梁为针对铁路简支梁所研发的新型减隔震装置。为了解2种装置的减隔震效果,采用抗震简化算法,依次将梁重、桥墩刚度、场地特征周期及设防标准对减震率的影响进行对比分析。研究发现,2种装置的减震率在55%~80%之间,减隔震效果优异,减震榫的减震效果略优于榫形防落梁;对装置减震率影响最大的因素为桥墩刚度,其次为场地特征周期,影响较小的为设防标准,梁重对减震率基本无影响。研究成果可促进减震榫与榫形防落梁的工程应用,为防落梁装置型号的选择提供参考。
Steel bar damper and steel bar restrainer are new-type shock-absorbing and isolating devices developed for railway simply supported beams.In order to understand the seismic isolation effects of the two devices,a simplified seismic algorithm is used to compare and analyze the effects of beam weight,bridge pier stiffness,site characteristic period,and fortification standards on the seismic reduction rate.The study finds that the shock absorption rate of the two devices is between 55%and 80%,the shock absorption effect is excellent,and the shock absorption effect of the steel bar damper is slightly better than that of the steel bar restrainer.Through comparative analysis,it is found that the factor that has the greatest influence on the damping rate of the device is the stiffness of the bridge pier,followed by the site characteristic period,and the less influential factor is the fortification standard,and the beam weight basically has little effect on the damping rate.The research results can promote the engineering application of steel bar damper and steel bar restrainer,and provide reference for the selection of device type.
作者
周友权
文强
康炜
吴延伟
李承根
ZHOU Youquan;WEN Qiang;KANG Wei;WU Yanwei;LI Chenggen(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)
出处
《铁道标准设计》
北大核心
2020年第S01期79-84,共6页
Railway Standard Design
基金
中国铁路总公司企业标准《铁路桥梁减震榫》编制项目(17CR052)。
关键词
铁路桥
减震榫
榫形防落梁装置
简支梁桥
减隔震效果
减震率
罕遇地震
railway bridge
steel bar damper
steel bar restrainer
simply supported beam bridge
damping and isolation effect
shock absorption rate
rare earthquake
