悬臂施工阶段预应力箱梁的剪力滞效应分析

摘要

结合一大跨高墩连续刚构桥的施工控制，对其剪力滞效应进行实桥测试分析，并采用Ansys有限元分析方法，对该桥在施工过程中箱梁截面的正应力进行研究，计算结果与实测值相比较，得出大跨高墩连续刚构桥施工过程中正负剪力滞的分布规律，该结论对于同类桥型的设计施工具有参考价值。%Combining with the construction control in the large-span high pier continuous rigid frame bridge, the study undertakes the bridge test analysis on its shear lag effect, researches the normal stress of the box girder section in the bridge construction process by adopting Ansys finite el- ement analyzing method, undertakes the comparison between the calculation results and the test one, and concludes the distribution law of the positive and negative shear lag in the construction process of the large-span high pier continuous rigid frame bridge, so the conclusion has the ref- erence value for the design and construction of similar bridges.