地震作用下高墩刚构桥最大悬臂状态抗倒塌性能研究  

Study on Collapse-resistant Performance of the Longest Cantilever Stage of Rigid Frame Bridges with High Piers Under Earthquake

作　　者：张行[1] 张谢东[1] 赵晓华[2] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]空军第一建筑安装工程总队,北京100076

出　　处：《武汉理工大学学报（交通科学与工程版）》2013年第6期1273-1277,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：近年来越来越多的高墩桥梁应用于实际工程之中,评估其在地震作用下的抗倒塌能力具有重要意义.目前基于IDA的弹塑性时程分析是强震作用下结构倒塌研究最合理的方法之一.基于OpenSees平台的纤维单元建立了能考虑结构非线性特性的计算模型,并定量考虑了桥墩截面纵向钢筋受压屈曲对结构强度和刚度退化的影响,通过不同方向地震作用下IDA分析,探讨了高墩最大悬臂状态的抗倒塌能力.At present more and more rigid frame bridges with high piers are coming to our eyes. The subject of evaluate and ensure the collapse safety under earthquake action is of great importance. The IDA （incremental dynamic analysis） is one of the most reasonable methods to evaluate the collapse ability of structure under the action of serious earthquake. The nonlinear fiber model is establish by OpenSees and the effect of longitudinal reinforcements buckling on the structure is been taken into account quantitatively. The collapse ability of high piers is analyzed under actions of different earthquake directions.

关 键 词：地震 倒塌 高墩 应变 屈曲 

分 类 号：U448.1[建筑科学—桥梁与隧道工程]