超高格构钢管混凝土索塔地震响应及损伤分析  

Dynamic Response and Damage Analysis of Ultra-high Lattice Steel Tube Concrete Bridge Tower under Earthquake Action

作　　者：孟宪聪 张谢东[1] 刁锡钢 金小强 汪威 MENG Xiancong;ZHANG Xiedong;DIAO Xigang;JIN Xiaoqiang;WANG Wei(Wuhan University of Technology,School of Transportation and Logistics Engineering,Wuhan 430063,China;Sichuan Transportation Construction Group Co.Ltd.,Chengdu 610041,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063 [2]四川省交通建设集团股份有限公司,成都610041

出　　处：《武汉理工大学学报(交通科学与工程版)》2025年第1期181-187,共7页Journal of Wuhan University of Technology(Transportation Science & Engineering)

摘　　要：文中基于时程分析法研究了格构式钢管混凝土索塔关键施工阶段在E2地震作用下的动力响应,并采用增量动力分析法探究了强震作用下格构式钢管混凝土索塔的抗震性能,分析了索塔关键截面在强震中的损伤情况和耗能方式.结果表明:在E2地震作用下格构式钢管混凝土索塔施工过程中出现严重损坏的风险较小,但外包混凝土易受拉开裂;索塔的曲率延性系数高于普通钢筋混凝土受压构件,在地震中有着良好的延性和变形能力;在三向耦合高强度地震作用下,索塔最先完全破坏的位置在主肢下横梁上部内肢.Based on the time-history analysis method,the dynamic response of lattice concrete-filled steel tube pylon under E2 earthquake in key construction stage was studied.The seismic performance of lattice concrete-filled steel tube pylon under strong earthquake was explored by incremental dynamic analysis method,and the damage and energy consumption mode of key sections of pylon under strong earthquake were analyzed.The results show that there is little risk of serious damage during the construction of lattice concrete-filled steel tube pylon under the E2 earthquake,but the wrapped concrete is prone to tensile cracking.The curvature ductility coefficient of cable tower is higher than that of ordinary reinforced concrete compression members,and it has good ductility and deformation ability in earthquake.Under the action of three-dimensional coupled high-intensity earthquake,the first complete failure position of the cable tower is in the upper inner limb of the lower beam of the main limb.

关 键 词：高地震烈度区 钢管混凝土 抗震分析 索塔 格构式结构 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]