某大桥桩柱-盖梁结构体系开裂研究  

Study on Structural Crack of Pile and Cap for a Bridge

作　　者：杜青[1] 蔡美峰[1] 张献民[2] 

机构地区：[1]北京科技大学土木工程学院,北京100083 [2]河北工业大学土木工程学院,天津300132

出　　处：《公路交通科技》2005年第9期98-101,共4页Journal of Highway and Transportation Research and Development

摘　　要：针对衡水市某大桥盖梁与桩柱上出现的严重裂缝问题进行了试验与数值模拟研究,通过在桥面汽车加载条件下的基桩沉降、裂缝扩展等的测试,研究了构件开裂的力学机理,通过对桩周土瞬态面波测试,研究了桩周土面波速度随深度的变化,并应用有限元进行了模拟验算。通过综合分析,最终给出了构件开裂的原因。Some experiments and numerical simulation on the serious crack occurred on the cap and pile of a bridge in Hongshui city were made. On the basis of the test of the settlement and crack propagation of the pile foundation under the truck loading on the bridge, the mechanical mechanism of the crack propagation was studied. By measuring the transient surface wave of the soil surround the piles, the velocity change in the surface wave with the depth of soil was analyzed and the results were checked by using finite element analysis. Finally, the reasons of the cracking were presented by means of comprehensive analysis.

关 键 词：开裂机理 基桩沉降 桩周土 瞬态面波 有限元 

分 类 号：U446[建筑科学—桥梁与隧道工程]