基于荷载试验的空心板桥加固效率分析

基于3座预应力混凝土空心板桥在试验荷载下加固前后荷载试验及理论计算得出的板底平均应力和挠度结果,对比粘贴碳纤维筋加固、简支转连续加固和粘贴钢板加固3种方法对简支预应力空心板桥结构的力学性能的提升效果。结果表明,粘贴碳纤维筋加固及粘贴钢板加固方法对结构刚度有轻微提高,对结构的延性及承载力有一定的提高;简支转连续加固方法在荷载作用下挠度减小最为明显,对结构刚度和承载力提升明显,对支点处的抗剪承载力也有所提升。

Reinforcement Efficiency Analysis of Hollow Slab Bridge Based on Load Test

Based on the results of load tests before and after the reinforcement of three prestressed concrete hollow slab bridges,this paper compared the improvement of mechanical properties of the hollow slab bridges by three methods:carbon fiber reinforcement,simply supported continuous and glued steel plate reinforcement.The results showed that the stiffness and ductility and bearing capacity of the structure can be improved slightly by using carbon fiber reinforcement and steel plate reinforcement.Under the action of load,the deflection of the simply supported continuous reinforcement method decreased most obviously,and the stiffness and bearing capacity of the structure increased obviously,and the shear bearing capacity of the fulcrum was also improved.