高烈度地震区长联大跨连续梁桥减隔震方案分析  

SEISMIC ISOLATION SCHEME ANALYSIS OF LONG-CONNECTED AND LONG-SPAN CONTINUOUS BEAM BRIDGE IN HIGH INTENSITY SEISMIC REGION

作　　者：蔡军哲 司龙 CAI Junzhe;SI Long(Shaanxi Intercity Railway Co.,Ltd.,Xi'an 712035,China;Chang'an Erea Transportation Bureau,Xi'an 710100,China)

机构地区：[1]陕西城际铁路有限公司,西安712035 [2]陕西省西安市长安区交通运输局,西安710100

出　　处：《低温建筑技术》2023年第12期84-87,97,共5页Low Temperature Architecture Technology

摘　　要：为研究高烈度地震区长联大跨连续梁在地震作用下减隔震技术,采用有限元建立跨径(50+8×100+50)m连续梁模型,在罕遇地震作用下,基于传统抗震设计对比双曲面球型减隔震支座、双曲面球型减隔震支座和黏滞流体阻尼共同作用减隔震措施及结构响应分析。结果表明采用双曲球面支座和黏滞流体阻尼器共同作用的减隔震技术为最优方案,各墩地震响应分配均匀、合理。结构纵横位移均在±30cm之内,桥墩及基础处于弹性状态。In order to study the seismic isolation technology of long-connected long-span continuous beams in high-intensity earthquake region,a model of long-span continuous beams with a span of(50+8×100+50)m is estab⁃lished by using finite element method.Based on the traditional seismic design,the hyperbolic spherical bearing,hy⁃perbolic spherical bearing,and viscous fluid damping are compared.The results show that the seismic response dis⁃tribution of each pier is uniform and reasonable,and the seismic isolation technology with hyperbolic spherical bear⁃ing and viscous fluid damper is the best one.The longitudinal and transverse displacement of the structure are all within±30cm,and the pier and foundation are inthe elastic state.

关 键 词：高烈度地震区 长联大跨连续梁 减隔震方案 双曲面球型减隔震支座 黏滞流体阻尼器 

分 类 号：TU352.1[建筑科学—结构工程]