Research On The Bearing Capacity Of Long-span Zhongchengshi Arch

In recent decades, with the progress of science, and technology, the development of bridge structure have also made remarkable achievements, and Bridges to the promotion of research and development testing bridge structure design calculation theory, solve problems in production practice plays an important role. To ensure the normal use of both large bridge, need to bridge for the load test, the test of its carrying, capacity state and structure character is in accordance with the design standard and service requirements. And the bearing capacity of the Bridges.In this paper, the hangzhou canal bridge bridge LiangJing, dynamic load test methods were studied. Presents a practical bridge the most often USES dynamic load tests of loading method, the dynamic responses of bridge, the dynamic characteristics of the evaluation index are introduced and summarized. And use of MIDAS software, a simulation of static and dynamic load with test data correction model and the actual expects to get fit with the state. By using fern software testing bridge for the MIDAS modeling analysis, and the actual experiment data contrast analysis of the practical bearing capacity of a bridge state evaluation. In the dynamic load test, the acquisition of bridge structure respectively in pulse, jumped and different situation under dynamic response speed signal, the structure calculating the natural vibration frequency of damping ratio and the speed, the impact coefficient, The bridge static dynamic load experiment showed that hangzhou canal bridge the structure of the basic intact, safety performance meets the requirement. The results show that the apparent check with no obvious quality defects. To bridge the practical work based model, the checking the bridge in constant load and live load conditions key components of the section safety assessment coefficient, and verifies the safety performance of the bridge. And through the overloaded vehicles, the paper studies the bridge in injury status and future to the structure when overloaded vehicles, responding to its carrying capacity was predicted. The result of this paper for this bridge maintenance reinforcement provides guidance opinion, the same bridge after the test and check the answers of bearing capacity are great value of reference.