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钢管混凝土格构式高墩连续梁桥抗震设计
欧智菁, 林建茂, 林上顺, 林文
福建工程学院 土木工程学院, 福州 350118
摘要:
以干海子特大桥为工程背景,选取不同的结构设计参数,包括墩高、柱肢坡度、轴压比、支主管管径比、平缀管竖向间距、柱肢含钢率、横撑道数、墩顶柱肢间距及柱肢截面形式,采用midas civil有限元软件构造34座三跨对称连续梁桥作为计算模型,进行E1弹性地震响应分析,研究结构设计参数对钢管混凝土格构式高墩连续梁桥抗震性能的影响规律和适用性,在此基础上进行全桥优化设计。计算结果表明,优化后的实桥模型可大大降低地震响应,改善结构内力分布。
关键词:  钢管混凝土  格构式高墩  连续梁桥  抗震设计
DOI:10.11835/j.issn.1000-582X.2018.09.011
分类号:TU398.9
基金项目:国家自然科学基金项目(51408128);福建省自然科学基金项目(2017J01471);福州市科技计划项目(2018-G-64)。
Research on seismic design of continuous girder bridge with high piers of concrete filled steel tubular laced column
OU Zhijing, LIN Jianmao, LIN Shangshun, LIN Wen
School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, P. R. China
Abstract:
The continuous girder bridge with new high piers of Concrete Filled Steel Tubular (CFST) laced column has a broad prospect in the construction of bridges in earthquake area. Based on the engineering background of Gan haizi super-large bridge, 34 finite element models of three span continuous bridge were built by universal program of Midas Civil, with different structure design parameters including the pier height, longitudinal slope, axial compression ratio, diameter ratio of lacing tubes and longitudinal tubes, vertical spacing of flat lacing tubes, steel ratio of longitudinal element, number of bracing element, pier top spacing and section form of longitudinal element etc, and the influence of structural parameters on seismic performance of continuous girder bridge with high piers of CFST laced column and the application scope of these parameters were researched through elastic seismic response analysis on E1 earthquake. Then, optimum design of bridge was carried out on the base of numerical results, and calculation results indicated that seismic response of optimized model reduced greatly.
Key words:  concrete-filled steel tube  high pier with laced column  continuous girder bridge  seismic design
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