考虑“桩-土结构相互作用”的拱桥时程分析  

Time History Analysis of Arch Bridge Considering the Pile-soil Structure Interaction

作　　者：贺效强 He Xiaoqiang(Shanxi Traffic Planning Survey and Design Institute Co.,Ltd.,Taiyuan 030032,China)

机构地区：[1]山西省交通规划勘察设计院有限公司,太原市030032

出　　处：《北方交通》2022年第12期10-13,共4页Northern Communications

摘　　要：以某下承式混凝土拱桥为依托,建立迈达斯Civil有限元模型,分析了“桩-土结构相互作用”对桥梁地震响应的影响,结果表明:考虑“桩-土结构相互作用”使得轴力、弯矩、剪力均有所降低;考虑“桩-土结构相互作用”的模拟方式更加符合桥梁的实际状态,桥梁结构在静力荷载工况作用下的结构内力及变形均有一定程度的减小;考虑“桩-土结构相互作用”后,尤其以8~25s段的桥梁时程分析幅值下降最为明显;根据8~25s的时程分析结果,考虑“桩-土结构相互作用”后,跨中截面速度峰值可下降18.5%,跨中截面加速度峰值可下降21.8%,跨中截面挠度峰值可下降20.1%。Based on a through concrete arch bridge, the influence of "pile-soil structure interaction" on the seismic response of the bridge is analyzed by establishing the Midas Civil finite element model. The results show that: the axial force, bending moment and shear force are reduced when considering the "pile-soil structure interaction";the simulation method considering the "pile-soil structure interaction" is more consistent with the actual state of the bridge, and the internal force and deformation of the bridge structure under the static load condition are reduced to a certain extent;after considering the "pile-soil structure interaction", the amplitude of time history analysis of the bridge in the 8~25 s section decreases most obviously;according to the time history analysis results of 8~25 s, after considering the "pile-soil structure interaction", the peak velocity of midspan section can be reduced by 18.5%, the peak acceleration of midspan section can be reduced by 21.8%, and the peak deflection of midspan section can be reduced by 20.1%.

关 键 词：下承式拱桥 迈达斯Civil 桩-土结构相互作用 时程分析 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]