一种连续梁桥高效阻尼体系  

An efficient damping system for continuous girder bridg

作　　者：李子阳 许浩[1] 张强[1] 杨巧荣[1] 徐子东 LI Ziyang;XU Hao;ZHANG Qiang;YANG Qiaorong;XU Zidong(School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学力学与工程科学学院,上海200444

出　　处：《上海大学学报（自然科学版）》2023年第4期734-744,共11页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(51778356)。

摘　　要：提出了一种连续梁桥高效阻尼体系(efficient damping system of continuous girder bridge, EDB),通过放大阻尼器的相对位移来提高耗能效率.为了研究该阻尼体系在连续梁桥抗震中的适用性,设计制作了3倍位移放大型阻尼器和普通阻尼器的试验模型,并在正弦波作用下进行往复加载试验.分析了不同试验工况下阻尼器的滞回曲线,并将理论值与试验值进行了对比,验证了其放大效果.以一座6跨连续桥梁为工程背景,基于有限元软件建立其多质点模型,分析了不同减震方案在3条地震波作用下的墩底剪力、墩底弯矩、位移、滞回曲线、能量耗散曲线.研究结果表明,连续梁桥高效阻尼体系有效地耗散了地震能量,减小了桥梁结构的地震响应.In this study,an efficient damping system for continuous girder bridges(EDBs)is proposed to improve the energy dissipation efficiency by amplifying the relative displace-ment of the dampers.To investigate the applicability of this damping system in the seismic resistance of continuous girder bridges,an experimental model of both common and mag-nified viscous dampers with triple displacements is designed to conduct a reciprocating loading test under the action of a sine wave.The amplification effect is verified by compar-ing the test results with those under ordinary dampers.Finite element software is used to establish a multi-mass point model of a six-span continuous bridge to analyze the pier bot-tom shear force,pier bottom bending moment,displacement,hysteresis curve,and energy dissipation curve of different damping schemes under the action of three seismic waves.The results show that the efficient damping system of the continuous girder bridge effectively dissipates the seismic energy and reduces the seismic response of the bridge structure.

关 键 词：位移放大装置 连续梁桥高效阻尼体系 往复试验 地震响应 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]