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以某大桥波形钢腹板异步浇筑施工为背景,针对波形钢腹板施工期局部应力集中问题,采用有限元分析软件Ansys建立波形钢腹板有限元模型并模拟异步浇筑施工过程。基于有限元模型和现场实测数据,得到了各施工工况下桥梁关键截面波形钢腹板的局部应力状态。研究表明:有限元模型与实测应力数据相对吻合,随着施工的进行,各项应力值均不断增大,0#块根部波形钢腹板剪应力实测值在施工到8#悬臂节段时达到最大值(23.3 MPa),低于有限元计算值(26.5 MPa)和钢腹板材料的强度设计值(310 MPa)。
Aiming at the problem of local stress concentration in the corrugated steel webs during the construction period, the finite element analysis software Ansys was used to establish the finite element model of the corrugated steel webs and to simulate the process of as-pouring construction. Based on the finite element model and on-site measured data, the local stress state of the corrugated steel webs with key cross-section of bridge under various construction conditions was obtained. The results show that the finite element model is in good agreement with the measured stress data. As the construction progresses, the stress values increase continuously. The measured values of the shear stress of corrugated steel webs at the root of 0 # The maximum value (23.3 MPa) is lower than the calculated value of the finite element (26.5 MPa) and the strength design value of the steel web material (310 MPa).