Research On Analysis For Single Transverse Steel-Arch Pylon Cable-Stayed Bridge

In this thesis, the author briefly introduces the development of feature cable-stayed bridges and the design of single transverse steel arch-pylon cable-stayed bridge. Based on preliminary design scheme of the Taijiang Bridge, a transverse steel-arch single pylon cable-stayed bridge, in Sanming City, Fujian Province, which is planed to build, the author simulates all kinds of structural members, such as girders, pylons, cables, piers, tendons and basements, and builds up the integrated finite element model of the entire bridge by MIDAS/CIVIL 2006, a large-scale FE software. The effect of pile-soil interaction and the time-dependment effect can be taken into account. Based on the preliminary design scheme, the author uses this model and divides twelve construction stages to analyse the stress and displacement of structural members in each constrction stage. At the same time, the effects caused by the shrinkage and creep of concrete are analysed too. In this thesis, the influence lines of members are analysed, so is the effect caused by all kinds of loads, such as live load, temperature difference, temperature gradient, wind load. According to the code, the author combines these loads and gets the worst load effect. The natural characteristics of vibration are analysed. By means of the response spectrum and time history analysis, the author concludes the seismic response of the primary members such as girders, pylons and cables. At last, the author researches the stability in the finished state and operation stage and gets the performance index of stability. Therefore, the static, dynamic and stable behavior and analysing method of this kind of bridge are comprehensively understood.