超载对公路钢筋混凝土梁式桥的危害分析

摘要

This paper introduced the reasons and development processes of cracks and deformation of bridge structure under the loads of overload vehicle, and taking a typical five beam freely-supported T type beam bridge for example, analysed the relationship of the loads of overload vehicle and the crack width, deflection of bridge structure, got the change law of crack width and deflection of bridge under overload action.%介绍了桥梁结构在超载车辆荷载作用下产生较大的裂缝和变形的原因及其发展过程，并以一个典型的五梁式简支T型梁桥为算例，分析了超载车辆荷载与桥梁结构的裂缝宽度、挠度之间的关系，得到了桥梁的裂缝宽度和挠度在超载作用下的变化规律。