连续钢构桥梁支座消能减振抗震加固技术研究  

Research on energy dissipation and vibration reduction seismic reinforcement technology of continuous steel bridge bearings

作　　者：刘旭川 LIU Xuchuan(Gansu Construction Investment Civil Engineering Construction Group Co.,Ltd.,Lanzhou 730050,China)

机构地区：[1]甘肃建投土木工程建设集团有限责任公司,兰州730050

出　　处：《建筑结构》2022年第14期98-102,共5页Building Structure

摘　　要：为提升连续钢构桥梁的抗震性能,提出一种新的连续钢构桥梁支座消能减振抗震加固技术,建立了连续钢构桥梁有限元结构模型,并对其进行动力特性分析与地震反应时程分析,以根据计算结果对支座进行消能减振抗震加固设计。通过MIDAS软件建立采用摩擦摆隔震支座的桥梁受力模型,并根据模型获取的支座设计参数进而确定支座双线性模型的相应参数。对桥梁进行结构设计时,将其设置为固定支座,且在桥梁横、纵方向均设置限位装置,同时在摩擦摆隔震支座处加设新型金属阻尼装置以控制桥梁位移过大。以某连续钢构桥梁实际工程为例,采用MIDAS Civil软件对桥梁结构的位移、内力进行有限元仿真分析。结果表明,采用提出的连续钢构桥梁支座消能减振抗震技术减小了地震作用下纵桥向与横桥向上的位移、剪力与弯矩,达到了良好的消能减振抗震效果。In order to improve the seismic performance of continuous steel bridge,a new energy dissipation and vibration reduction reinforcement technology of continuous steel bridge support was proposed.The finite element structural model of continuous steel bridge was established,and its dynamic characteristics and seismic response time history were analyzed,the support was designed for energy dissipation and vibration reduction seismic reinforcement according to the calculation results.The bridge force model with friction pendulum vibration isolation bearing was established by MIDAS software,and the corresponding parameters of the bilinear model of the bearing were determined according to the bearing design parameters obtained from the model.When designing the structure of the bridge,it is set as a fixed bearing,and a limit device was set in the horizontal and vertical directions of the bridge.At the same time,a new metal damping device is added at the friction pendulum isolation bearing to control the excessive displacement of the bridge.Taking a continuous steel bridge as an example,the displacement and internal force of the bridge structure were simulated and analyzed by MIDAS Civil software.The results show that the proposed energy dissipation and vibration reduction seismic reinforcement technology of continuous steel bridge support reduces the displacement,shear force and bending moment of the longitudinal and transverse bridges under the action of earthquakes,and achieves a good energy⁃dissipating,vibration⁃damping and anti⁃seismic effect.

关 键 词：连续钢构桥梁支座 消能减振 加固技术 摩擦摆隔震支座 

分 类 号：TU393􀆰[建筑科学—结构工程]