既有简支空心板桥受弯荷载试验研究

Study on bending load test of existing simply supported hollow slab bridge

结合两座跨径分别为13 m与16 m的简支空心板桥,开展了全桥受弯荷载试验研究。根据相关规范制定了试验加载方案,并基于新规范与老规范计算了试验荷载效率系数,通过对比分析试验测试数据与有限元分析数据,得出两座空心板梁桥在试验荷载作用下均处于弹性工作状态;最后,明确了有限元模型中是否考虑后浇混凝土层对空心板梁受弯计算结果的影响。

Load test and analysis were carried out on two simply supported bridges of prestressed concrete hollow slab with spans of 13 m and 16 m.According to the relevant codes,the test loading scheme was formulated.The test load efficiency coefficient was calculated according to the new code and the old code respectively.By comparing the test data and finite element analysis data,it is concluded that the two hollow slab bridges are in elastic state under the test load.Finally,it is clear whether the influence of post pouring concrete layer on the bending calculation results of hollow slab beam is considered in the finite element model.