平列式公铁两用大桥静载试验研究

介绍某平列式公铁两用大桥静载试验情况,并结合ANSYS空间有限元模型,将试验数据与理论计算值和规范值进行分析比较,对其承载能力和安全运营条件作出评价。结果表明:在单独列车荷载的作用下,桥梁整体工作状态较好;在有汽车荷载的偏载作用下,整体工作性能降低;为确保安全,公路应严格限制汽—13级荷载通行。

Study of Static Load Tests of Parallel-Type Combined Highway and Railway Bridge

The static load tests of a parallel-type combined highway and railway bridge are in- troduced.By means of spatial finite element model ANSYS,the data of the tests are analyzed and compared to the theoretic calculations and values in the codes and specifications,and the carrying capacity and safety operation conditions of the bridge are evaluated.The results show that the global operation conditions of the bridge are fairly good under action of train load alone,howev- er,together with the eccentric load of vehicles on the bridge,the global operation performance will decrease.To ensure the safety of the bridge,the passing of vehicle load-13 on highway deck should be strictly limited.