钢管混凝土组合桁梁-格构墩轻型桥梁振动台阵试验研究

发布时间：2018-04-01 23:13

本文选题：桥梁工程　切入点：钢管混凝土组合桁式梁　出处：《工程力学》2014年09期

【摘要】：为了研究钢管混凝土组合桁梁-格构墩轻型桥梁的抗震性能,以干海子大桥为原型,设计制作了几何缩尺比例1∶8的两跨钢管混凝土组合桁梁-格构墩试验模型,利用福州大学地震模拟振动台台阵系统,采用实桥的设计地震波,进行了该轻型桥梁的基本动力特性试验、抗震性能试验及破坏特性研究。结果表明,模型实测频率和位移与实桥满足相似比关系;在横向或纵向地震作用下,桥墩格构式区域加速度放大效应明显,减小了主梁混凝土顶板的加速度响应;相同强度下,横桥向地震作用桥墩应变大于纵桥向地震作用,同时可以不考虑纵、横向地震力共同作用。在设计地震动作用下,墩顶位移满足位移限值的规定;模型未出现开裂和破坏现象,表明钢管混凝土组合桁梁-格构墩轻型桥梁具有良好的抗震性能。
[Abstract]:In order to study the seismic behavior of concrete-filled steel tubular composite truss beam-lattice pier light bridge, a two-span concrete filled steel tube composite truss beam-lattice pier test model with 1:8 geometric scaling ratio was designed and manufactured based on Qianhaizi Bridge. Using the seismic simulation platform array system of Fuzhou University and the design seismic wave of the real bridge, the basic dynamic characteristic test, seismic performance test and failure characteristic study of the light bridge are carried out. The results show that, The measured frequency and displacement of the model satisfy the similarity ratio with the real bridge. Under the action of transverse or longitudinal earthquake, the acceleration amplification effect of the lattice region of the bridge pier is obvious, which reduces the acceleration response of the concrete roof of the main beam, and the acceleration response of the concrete roof is reduced under the same strength. Transverse bridge seismic action pier strain is greater than longitudinal bridge seismic action, at the same time, longitudinal and lateral seismic forces can not be taken into account. Under the action of design ground motion, the displacement of pier top meets the limit of displacement, and the model does not appear cracking and failure phenomenon. The results show that the concrete filled steel tube composite truss beam-lattice pier light bridge has good seismic performance.
【作者单位】：福州大学土木工程学院;威尼斯建筑大学;
【基金】：福建省杰出青年科学基金项目(2012J06013) 教育部“新世纪优秀人才支持计划资助”项目(NCET-13-0737)
【分类号】：U446.1

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