ABSTRACT
A cable-stayed bridge is designed as a modular assembled bridge. The central core square box is responsible for the longitudinal load effect. The cantilever on both sides is responsible for transmitting the vehicle load to the square box, only bearing the lateral effect of the load. The steel-mixed composite girder is used for the side span and the full steel box girder is used for the middle span. The cable-stayed bridge is clear in the transmission and distribution of the live load effect, but the special design leads to the uncertainty of the temperature effect. The unevenness of the bridge structure size and the stiffness distribution, which may lead to the unevenness of the temperature field, may also causes local stress accumulation and causes local damage. In order to support the design optimization work, based on the measured meteorological data, the simulation of continuous temperature field is carried out. The characteristic analysis of temperature field shows that the temperature distribution of each component of the structure is very significant. Based on the analysis of the most unfavorable temperature difference, a composite model for the calculation of temperature effect is proposed.
