The Setting Of Latter Pouring Belt Of Super-Long Concrete Structure Temperature Stress Influence

Design code of concrete structure defined:type of cast-in-place reinforced concrete frame structure the largest spacing of expansion joint of 55 meters, more than 55 meters structure are super long structure. Consider the seismic performance of structure, the function of waterproof, heat preservation and use of the structure of the need, do not set expansion joints of super-long buildings have emerged, but this has resulted in super-long concrete structure crack. Set post poured belt is one of the effective measures of crack control, but after the setting of the pouring belt and not set the spacing did not strict rules, study on the effect of post pouring belt closure temperature of temperature difference value of research is rare. This paper, taking a skirt building hospital in Shandong province as the engineering background, the structure is 114 meters long,94.2 meters wide, the floor four layers and without seam of extra-long concrete structures,study the setting of post poured belt and the seasonal temperature difference value on the mechanical behavior of the project.This article focuses on the setting of post poured belt of super-long concrete structure temperature stress influence. First put forward the calculation method of super long concrete structure temperature stress, and then on the basis of the method to determine the settings of post-cast strip article number, at the same time, combining with the project construction process to determine the seasonal temperature difference value, finally applies the previous research results and ideas in practical engineering projects.In order to clear analysis post poured belt to sew and ultra long concrete structure temperature stress effect, this paper puts forward the overlong concrete structure temperature stress calculation method for the different axes of symmetry of the odd cross and even across the board and various reasons caused by temperature stress are shown corresponding calculation method, and through the establishment of three simple model of reinforced concrete frame structure is respectively on the plate temperature should be hand force calculation, computer results, are analyzed and the feasibility of the method.On this basis, the pouring belt in overlong concrete structure in a number of settings, through in the model of super length concrete structure are respectively provided 0,1,2 post pouring belt, and consider the influence of creep on the plate temperature stress proposed a determined overlong concrete structure after pouring belt number theoretical method to determine, at the same time, combined with the project construction process, determine the set after pouring belt overlong concrete structure seasonal temperature difference value method.Finally, considering the self shrinkage and seasonal cooling, respectively to set post pouring belt and poured with two cases, using software MIDAS Gen of the practical engineering structure temperature stress calculation, and on the plate temperature should force, column internal force and displacement of comparative analysis and get relevant conclusions.