大跨度槽型钢混组合连续梁抗震性能  

Seismic Performance of Large-span Channel Steel Composite Continuous Beam

作　　者：陈国华 CHEN Guohua(Fuzhou Highway Business Development Center Lichuan Branch Center,Fuzhou,Jiangxi 344600,China)

机构地区：[1]抚州市公路事业发展中心黎川分中心,江西抚州344600

出　　处：《黑龙江交通科技》2024年第7期106-111,共6页Communications Science and Technology Heilongjiang

摘　　要：大跨度槽型钢混组合连续梁桥由于其自重较轻,相对于普通连续梁桥而言,抗震性能较弱,因此为了保证钢混组合连续梁桥在地震作用下结构的受力状态稳定可靠,建立钢混组合梁连续梁全桥空间杆系三维模型,采用控制变量法对大跨度槽型钢混组合连续梁桥在地震作用下的力学性能进行分析,研究减隔震支座刚度、支座底部摩擦系数和阻尼比对钢混组合梁桥的桥墩底部弯矩和减隔震支座的最大变形的变化趋势。研究结果表明,提高减隔震支座的屈服刚度和支座底部摩擦系数可以减小减隔震支座的变形,提高了主梁中墩墩底的弯矩值,而结构阻尼比的增大也能够提高钢混组合连续梁桥的抗震性能。In order to ensure the stability and reliability of the structure under earthquake action,the long-span channel steel composite continuous beam bridge has weak seismic performance compared with the ordinary continuous beam bridge because of its light weight.A 3D model of the steel composite continuous beam bridge was established,and the mechanical properties of the long-span trough steel composite continuous beam bridge under earthquake were analyzed by using the control variable method.The stiffness,friction coefficient at the bottom of the support and damping ratio of the steel composite beam bridge were studied.The results show that increasing the yield stiffness and friction coefficient of the bearing can reduce the deformation of the bearing,but increase the bending moment value of the bottom pier of the main beam,and increase the structural damping ratio can also improve the seismic performance of the steel-concrete composite continuous beam bridge.

关 键 词：钢混组合连续梁桥 抗震性能 控制变量法 隔震设计 

分 类 号：TU398[建筑科学—结构工程]