波形钢腹板连续组合箱梁桥的荷载横向分布

Lateral Load Distribution of Continuous Composite Box Girder Bridge with Corrugated Steel Webs

采用修正偏心压力法研究波形钢腹板连续组合箱梁桥的荷载横向分布规律。结合工程实例,利用修正偏心压力法计算某单箱三室波形钢腹板连续组合箱梁桥的荷载横向分布系数,利用空间有限元分析程序进行了数值模拟,并对其偏心荷载工况下的挠度进行了实测。将修正偏心压力法、有限元模拟方法得到的挠度值与实测挠度值进行对比。结果表明,修正偏心压力法将空间问题转化为平面问题,且充分考虑了波形钢腹板组合箱梁的抗扭作用。得到的荷载横向分布系数与有限元计算结果吻合较好。采用该方法计算波形钢腹板连续组合箱梁桥荷载横向分布是可行且偏于安全的。

The is investigated lateral load distribution on continuous composite box girder bridge with corrugated steel webs using modified eccentric lateral load distribution prediction method. Combining with analysis and the field measurement are compared. It shows that （1） an improved plane model which considering the box girder torsional stiffness of the box girder can be introduced to solve the spatial problem by using modified eccentric lateral pressure method ; （2） the lateral load distribution factors obtained from the presented method agree well with those obtained from spatial FEM analysis. The presented method is feasible and conservative to solve the lateral load distribution on continuous composite box girder bridge with corrugated steel webs.