Research On Temperature Effect Of Super-long Reinforced Concrete Frame Structure

With the development of city construction and industrial construction, super-long reinforced concrete structure is more and more applied to large commercial, public and industrial buildings, in order to meet such architectural beauty and integrity requirements. The structure of the super-long concrete is generally not provided with expansion joints or less expansion joints, so the plane size is larger, and the cracking of concrete can be easily caused under the action of temperature and shrinkage. Therefore, it is very necessary to study the temperature effect of super-long concrete structure for the crack resistance design of the super-long concrete structure.This paper firstly determines the temperature effect of the super-long concrete frame structure in the construction stage and using stage. The effect of temperature by using the finite element analysis software MIDAS/Gen to calculate the structure under different conditions, and the deformation in two stages, the structure of the internal force and stress are analyzed. Finally, according to the conclusion, the influence of changing the height of the structure and the spacing of the expansion joint is discussed, and the specific work is as follows:Analysis of the temperature field in the construction stage and using stage of the super-long concrete frame structure. The shrinkage strain in concrete is converted into temperature difference, which is jointly considered with the seasonal temperature difference, and the effect of creep is also included in the reduction of temperature effect, Establish the temperature load of the structure in the two stages.Calculate the concrete frame cooling effect of temperature conditions in the stages of construction and using. By analyzing and comparing the calculation results can be drawn, in the construction stage and using stage of the temperature, the members of structure are likely to crack or even damage, so the temperature conditions of the two stages should be considered in the design of the super long concrete frame structure.For set expansion joints of super-long concrete frame structure, according to the construction and using phase analysis of temperature effect of contrast the conclusion to discuss structural layer change impact on spacing of expansion joints in the structure.