多跨连续梁拱组合体系桥梁抗震性能分析  

Seismic Analysis of Hybrid System Bridge of Multi-span Continuous Girder and Arches

作　　者：王坤林 付旺旺 席利飞 袁少洋 周俊福 WANG Kunlin;FU Wangwang;XI Lifei;YUAN Shaoyang;ZHOU Junfu(Shandong Hi-speed Yunnan Development Co.,Ltd.,Kunming 650200;School of Highway,Chang′an University,Xi′an 710064;Tianshui Normal University,Tianshui Gansu 741000;Yunnan Provincial Transportation Planning and Design Institute Co.,Ltd.,Kunming 650000;Gansu Autumn Rice Engineering Consulting Co.,Ltd.,Lanzhou Gansu 730000)

机构地区：[1]山东高速云南发展有限公司,昆明650200 [2]长安大学公路学院,西安710064 [3]天水师范学院,甘肃天水741000 [4]云南省交通规划设计研究院股份有限公司,昆明650000 [5]甘肃秋季米工程咨询有限公司,兰州730000

出　　处：《公路交通技术》2024年第5期47-54,共8页Technology of Highway and Transport

摘　　要：为了解相邻结构、行波效应和减隔震体系对多跨连续梁拱组合体系桥梁内力的影响,以某连续梁拱组合体系桥梁为实例,通过有限元软件建立抗震计算模型,并采用反应谱法和动力时程分析法对其进行地震反应分析。结果表明:1)连续梁拱组合体系桥梁在顺桥向地震作用下2种分析方法的计算结果大致相同,前者计算结果略大于后者,反应谱法的计算结果偏于安全;2)相邻结构对过渡墩的内力影响较大,对其他墩柱的内力影响较小,建议考虑相邻结构的影响;3)考虑行波效应后,各孔控制截面的位移、弯矩有少量增大,固定墩的内力显著增大,且随着波速的增大,结构的地震响应逐渐趋于一致激励下的地震响应;4)采用摩擦摆隔震支座后,结构的内力和位移响应均大幅降低,且各墩的受力更加均匀,建议大跨径桥梁采用减隔震体系,以降低结构的地震响应。In order to understand the influence of adjacent structure,traveling wave effect and isolation system on the internal force of multi span continuous beam arch composite system bridge,the calculation model was established by using finite element software based on a continuous beam arch composite system bridge.The seismic response was analyzed by response spectrum method and dynamic time history analysis method.The results show that:1) The calculation results of the two methods are basically consistent under the earthquake action along the bridge direction,and the calculation results of former are slightly larger than that of later,and the calculation result of response spectrum method is relatively safe;2) The internal force of transition pier is greatly affected by adjacent structure,and the influence of adjacent structure is suggested to be considered;3) Considering traveling wave effect,the displacement and bending moment of the control section of each hole increase slightly,and the fixed-pier′s internal force increases significantly.With the increase of wave velocity,the seismic response of the structure gradually tends to the seismic response under the uniform excitation;4) After the FPB(friction pendulum isolation bearing) is used,the internal force and displacement response of the structure are greatly reduced,and the force of each pier is more uniform.After adopting the friction pendulum isolation bearing,the internal force and displacement response of the structure are greatly reduced,and the force on each pier is more uniform.It is recommended that large-span bridges adopt a seismic isolation system to reduce the seismic response of the structure.

关 键 词：梁拱组合体系桥 抗震分析 反应谱法 动力时程分析法 相邻结构 行波效应 摩擦摆隔震支座 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]