Research On Temperature Field And Temperature Effect Of Steel Arch Tower Cable-stayed Bridge

Cable-stayed bridge is made up of three main parts:beam,column and pull.Due to its unique characteristics, such as light weight, strong spanning ability, cable-stayed bridge has obtained rapid development in recent years. Thus derived various types of cable-stayed bridge, such as variations on pylon, and changes in the main girder cross section form and material of the cable-stayed bridge. This paper focus on the novel form-steel arch tower cable-stayed bridge, study it’s temperature field under the sun’s radiation and the effect under the temperature effect.First, the emergence and development of the steel arch tower cable-stayed bridge is introduced in this paper. Then, the basic theory of the temperature research on the structure of the bridge is discussed in detail, in addition, the method of calculating structure temperature stress is gave out.Because of the unique form of the steel arch tower cable-stayed bridge, it is necessary to study on steel arch tower independent. The effect caused by temperature on large steel members is introduced in this paper. And by using the finite element software Midas FEA, the temperature effect on steel members is analyzed, as well as fittings formula of temperature difference of steel component.Combining with the actual situation of the project construction process, the steel arch tower’s Midas FEA element model which is in the phase of construction process is established. By determining the temperature load values, the steel arch tower,s effects on the gravity and temperature influence is analyzed by project thesis.The temperature gradient of girder cross section is analyzed by Midas FEA and a fitting formula is proposed according to the preparation of the temperature theoretical about bridge structure, combined with the engineering example. With the help of the Midas Civil which is a finite element analysis software, the main entity model is set up to analysis the structure’ effect in the act of system temperature, temperature difference between cable, tower, girder and concrete girder in the fitting effect of the temperature gradient mode.