摘要
Abstract
Bridge jacking project refers to the project of using hydraulic or mechanical equipment to raise the bridge to a certain height for maintenance,reinforcement or replacement of bridge parts.Taking an existing bridge in the East Third Ring Road of Harbin as an example,this paper applies the finite element simulation software Midas-Civil to intervene the dangerous stress in advance through the simulation analysis of the whole process of bridge jacking before construction.The project has six working conditions,and the analysis shows that in the first three working conditions,the stress does not exceed the limit,but under condition 4,the tensile stress of the bottom plate of the box girder reaches σmax=10.6 MPa>[σ]= 3.0 MPa,which exceeds the provisions of the relevant specifications.For this reason,on the premise of ensuring the design intention,the jacking height of some points given by the design is fine-tuned,and the adjusted tensile stress is reduced to σmax=2.9 MPa＜[σ]= 3.0 MPa,which meets the requirements of the code,and the stress value that exceeds the requirements of the relevant code does not appear in the construction under the following two working conditions.关键词
桥梁顶升工程/模拟/有限元分析/应力/顶升高度Key words
bridge jacking engineering/simulation/finite element analysis/stress/jacking height分类
交通工程
