异步悬浇施工中波形钢腹板局部变形研究

Study on local deformation of corrugated steel web in asynchronous suspension construction

为准确计算波形钢腹板连续刚构桥在异步悬浇施工过程中的局部变形。通过有限元软件Midas/FEA建立了板壳单元模型,研究了波形钢腹板在荷载作用下的局部变形,对比现场实测数据,分析了计算值与实测值的误差变化规律。研究结果表明:异步施工过程中的波形钢腹板局部变形主要来源于荷载的影响,根据误差变化规律拟合出挠度关系式,对施工中的波形钢腹板局部变形值进行修正,以保证成桥线形达到设计要求。

To accurately calculate the local deformation of corrugated steel web in asynchronous suspension construction,the plate and shell element model was established by finite element software Midas/FEA to study the local deformation of corrugated steel web under load.The error variation between the calculated value and the measured value was analyzed.The results show that the local deformation of corrugated steel web in asynchronous construction mainly comes from the influence of load.According to the law of error change,the deflection relation is fitted out,and the local deformation value of corrugated steel web in construction is corrected to ensure that the bridge alignment meets the design requirements.