二环线水东段立交桥荷载试验研究

Overpass Load Test Scheme for Shuidong Section of Second Ring Road

武汉市二环线水东段立交桥作为重要的交通枢纽,自建成之日起就承担了重要的交通运输作用,需要长期监测其试用情况并作出对应的应对方法。采用最直观的静载试验,根据不同的车载情况,改变纵向布置在截面中跨或者边跨弯矩以及挠度最不利位置,结合不同横向布置来监测桥梁的变形。并使用迈达斯建立计算模型,计算出静荷载使用效率,作为评估桥梁的使用情况指标之一。试验表明,荷载使用效率在理论范围内。本方案试验结果可作为该桥梁荷载试验指标。

As an important transportation hub,the Shuidong section of the Second Ring Road has assumed an important transport role since its completion,which has a certain effect on the health use of the bridge itself.Therefore,it is necessary to monitor its trial situation for a long time and make corresponding countermeasures.As the most direct load test,static load test was used in this experiment.The test used different vehicle mounted conditions,changed the longitudinal position of the mid-span or side-span bending moment and the most unfavorable deflection of the section,and monitored the deformation of the bridge in conjunction with different lateral layouts.Finally,the calculation model was established using Midas,and the efficiency of static load was calculated,which is one of the indicators to evaluate the use of Bridges.The experiment shows that the efficiency of load is within the theoretical range,indicating that this scheme is feasible and the experimental results can be used as the test index of the bridge.