弃方对水电站库区桥桥梁受力影响分析

Analysis on the influence bridge piers from abandoned earthwork

以澜沧江上游库区公路上一桥梁为例,因弃方违规堆载,导致桥梁产生病害,桥面产生较大位移。通过分析水平外力作用下的压弯构件,通过考虑几何非线性(P-△)与不考虑几何非线形对桥墩结构的影响,并对实桥检测结果和理论计算的结果进行了对比,验证了选取计算方法的合理性,以供其他的同类工程参考。

Taking a bridge on the highway in the reservoir area as an example,the damage of the bridge and the large displacement of the bridge deck are caused by the illegal stacking of abandoned earthwork.In this paper,the bending members are analyzed under the action of horizontal external force,considering the influence of geometrical nonlinearity on the pier.By the comparison between the test results of the bridge and the the theoretical results,the applicable calculation method is found,which can be used for other similar projects.