摘要
Abstract
In order to ensure the construction quality of a simple supported then continuous concrete box girder bridge,this paper takes a high-way bridge project in Beijing as an example,and analyzes the influence of support removal scheme on the mechanical properties of a simple supported then continuous concrete box girder bridge through MIDAS/Civil finite element simulation.The results show that the maximum ten-sile stress of the roof and bottom plate of the symmetrical removal is reduced by 25.8%and 3.4%,respectively,compared with the sequential removal condition.The maximum tensile stress of the roof and bottom plate of the temporary support were increased by 100%and 27.6%re-spectively.In conclusion,under the condition of symmetric removal of temporary supports,the deflection value of the bridge is the smallest,the change law is more uniform,and the tensile stress value is the lowest.It is suggested to adopt a symmetrical demolition scheme to effective-ly ensure the balanced distribution of mechanical response inside the simple supported concrete box girder bridge.关键词
桥梁工程/先简支后连续箱梁/有限元模拟/力学性能Key words
Bridge engineering/First simply supported and then continuous box girder/Finite element simulation/Mechanical property分类
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