薄壁空心高墩的延性分析  

Analysis of Ductility for Thin Wall Hollow High Pier

作　　者：王兆南[1] 张明朗[1] 赵海英[1] 李志刚[1] 

机构地区：[1]兰州工业学院土木工程学院,兰州市730050

出　　处：《公路》2016年第1期68-72,共5页Highway

基　　金：国家自然科学基金项目;项目编号41202230

摘　　要：通过有限元程序模拟了试验桥墩,分别就静力单调加载、滞回加载的两种情况做了空心高桥墩的力学性能研究与分析,并且与3个试验模型的试验结果做了对比,分别进行了各自的延性性能研究,计算了各个模型的弯矩、曲率,还有在不同轴压比下各个模型的曲率延性系数、位移延性系数,讨论了不同轴压比下各个模型延性指标的不同与原因;分析了不同轴压比下各个模型的延性性能,并与试验结果分析对比;论证了不同轴压比下,延性随着高轴压比而减小,混凝土的强度发展也会对桥墩的延性有着很大的影响。The test pier is simulated by the finite element program, study and analysis of mechanics performance for high hollow pier are made against two cases as static monotonic and hysteretic loading, and the results are compared with the three test model results, the ductility performance study is conducted respectively, bending moment and curvature of each model are calculated under different axial compression ratio, and the curvature ductility factor and displacement ductility coefficient of each model are computed, the difference and reasons for ductility index of each model uner different axial compression ratio are discussed- ductility performance under various models of different axial compression is analyzed and compared with test results; it is verified that under different axial compression ratio, ductility ratio decreases with high axial compressive strength of concrete, the development will have a great influence on the ductility of the pier.

关 键 词：高墩 圆端型 空心截面 延性 弹塑性 分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]