Study On The Effect And The Influence Of Main Cable Temperature Field Of Long Span Suspension Bridge In Complex Mountainous Environment

At present, the domestic scholars have attached great importance to the study of the temperature field and its effect of suspension bridge. Study on bridge structure temperature field and its effect has a rapid development in recent decades, but because of the change of temperature field and the distribution of main cable of the anomalies in the complex and uncertain, so that the temperature effect is difficult to be accurately determined by the impact force and suspension bridge safety of bridge construction, the cable suspension bridge.This paper mainly fish mouth Yangtze River bridge project as the backgroun d project, on the mountain of long span suspension bridge in different seasons, d ifferent construction stages of the main cable temperature field is studied. Theref ore, this paper carried out the following work:1) Effect of suspension bridge main cable temperature field and temperature effect are summarized. The influence of the structure and research situation at ho me and abroad;2) The thermal physical parameters of experimental tests of the theory are e xpounded, and the main cable model of thermal parameters is studied;3) Relying on the theory of finite element analysis, detailed simulation of te mperature effect on main cable background in engineering and finite element soft ware Midas/Civil software analysis;4) Through the analysis of the effect of temperature of the main cable, puts forward in different stages of construction temperature effect of the degree of t he structure, the mountain complex of long span suspension bridge under erectio n and later operation has an important guiding significance and reference value maintenance.