基于减隔震装置的刚构桥地震效应控制方法  

Control Method of Seismic Effect for Rigid Frame Bridge Based on Seismic Isolation Device

作　　者：龚纬[1] 燕斌[2] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津市300142 [2]北京工业大学城市与工程安全减灾教育部重点实验室,北京市100124

出　　处：《城市道桥与防洪》2014年第3期61-63,70,共4页Urban Roads Bridges & Flood Control

摘　　要：在地震作用下,刚构桥可采用的抗震策略极为有限,而减隔震设计不失为一种有效的选择。在对2种减隔震装置(拉索减震支座、液体粘滞阻尼器)的工作机理进行介绍的基础上,以某刚构桥为工程背景,从提高纵桥向抗震性能的角度出发,研究了减隔震装置对刚构桥纵向抗震性能的影响。减隔震装置对于提高刚构桥纵向抗震性能是有利的,可用于刚构桥的减隔震装置主要有拉索减震支座和液体粘滞阻尼器;拉索减震支座具有限位功能,对于减小梁端位移和主墩地震内力具有明显的效果,但会急剧增大过渡墩的地震内力;液体粘滞阻尼器可增大刚构桥的整体阻尼,具有耗散地震能量的功能,对于减小梁端位移和主墩地震内力具有显著的效果,但会明显增大过渡墩的地震内力。The seismic strategy able to be used for rigid frame bridge is extremely limited under the seismic action. But the design of seismic isolation can yet be regarded as an effective selection. The article introduces the working mechanizations of two seismic isolation devices(cable damping bearing, fluid viscous damper),and studies the influence of seismic isolation device on the longitudinal seismic performance of rigid frame bridge from the angle of improving the seismic performance of longitudinal bridge according to the engineering background of a rigid frame bridge. The cable damping bearing has the limiting function, and has the obvious effect to decrease the displacement of beam end and the earthquake inner force of main pier, but will distinctly increase the earthquake inner force of transit pier.

关 键 词：刚构桥 抗震性能 减隔震装置 拉索减震支座 液体粘滞阻尼器 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]