基于静载试验预应力的空心板桥承载能力分析

The Analysis of Prestressed Hollow Slab Bridge Bearing Capacity Based on Static Load Test

以北京至深圳国道主干线上某预应力空心板简支梁桥为例,通过汽车荷载试验-堆载破坏试验-汽车荷载对比试验3个阶段分别对桥梁进行破坏性试验,通过荷载试验直观地反应桥梁在加载至桥梁发生破坏的全过程中应变变化、裂缝发展和结构挠度的变化,并结合试验结果对桥梁的使用状况做出评定,为桥梁的安全运行提供科学的依据。

In this paper,a prestressed hollow slab beam on the highway trunk from Beijing to Shenzhen was taken as an example,and a destructive test of the bridge was made through three stages-- the load test,stack destructive test and car load test respectively. The load test directly shows the loading damage to bridges occurring during the whole process of strain changes of deflection,crack development and structure change. Then combined with the results of the bridge,the assessment of the usage of the bridge was done to provide a scientific basis for its safe operation.