摘要
橡胶隔震支座已被证明能有效减少桥梁的地震破坏。由于隔震支座特性的不同,不同橡胶支座组合的桥梁在地震作用下的力学性能比较复杂。因此主要研究橡胶隔震支座组合对连续刚构桥抗震性能的影响。采用动力时程分析方法,研究不同橡胶隔震支座组合对桥梁抗震性能的影响。研究发现,天然橡胶支座的地震反应比其他类型的支座要大。含隔震支座的连续刚构桥,如铅芯橡胶支座和高阻尼橡胶支座,由于支座滞回能的影响,在地震作用下的地震反应降低20%~30%,表明隔震支座提高了桥梁的抗震性能。同时具有NRBs和LRBs或NRBs和HDRBs的连续刚构桥比单一隔震支座的桥墩的地震反应大,但桥墩的地震反应比单墩小。
Rubber isolation bearings have been proved to be effective in reducing seismic damage of bridges.The mechanical properties of bridges with different rubber bearing combinations under earthquake are complicated due to the different characteristics of isolation bearing.Therefore,the influence of rubber isolation bearing combination on the seismic performance of continuous rigid frame bridge is studied.The dynamic time history analysis method is used to study the influence of different rubber bearing combinations on the seismic performance of bridges.It was found that the seismic response of natural rubber bearings was greater than that of other types of bearings.For continuous rigid frame bridges with isolated bearings,such as lead-core rubber bearings and high-damping rubber bearings,the seismic response of the bridges under earthquake is reduced by 20%~30%due to the influence of hysteretic energy,which indicates that the isolated bearings improve the seismic performance of the Bridges.The seismic response of continuous rigid frame bridges with both NRBs and LRBs or NRBs and HDRBs is greater than that of piers with single isolation bearings,but the seismic response of piers is smaller than that of single piers.
作者
赵健春
欧阳禄龙
王巨腾
Zhao Jianchun;Ouyang Lulong;Wang Juteng(China Architecture Civil Construction Co.,Ltd.,Beijing 100000,China)
出处
《山西建筑》
2023年第3期158-161,共4页
Shanxi Architecture
关键词
连续刚构桥
橡胶支座
抗震性能
continuous rigid frame bridge
rubber bearing
seismic performance
作者简介
赵健春(1986-),男,工程师,从事道路桥梁工程技术工作。
