Nonlinear Analysis Of The Temperature And Shrinkage Stress Of Super-long Reinforced Frame Concrete Structure And Design Measures Research

With the great development of society, the long and high buildings are more and more common, so people begin to seek beauty of buildings. For super-long concrete structures, according to the requirement of the specifications, When the structure is more than a certain length, it must set expansion joint. This will definitely affect the appearance and use of the building. Thus, the analysis of the influence of the temperature effect of the concrete structures is very necessary. Taking proper measures to reduce the number of expansion joint or not to set expansion joint is also the main issues of the domestic and overseas scholars.This paper works as follows. First, this paper summarizes the present research status of the analysis of the temperature stress and control measures at home and abroad. This paper tries to put forward the main content. Then, this paper introduces the cause of the temperature effect, the types of the temperature load and the simplified calculation method of the temperature stress. This paper also expounds the concrete structure shrinkage, creep and stress relaxation theory. Second, this paper introduces the finite element analysis method, finite element unit of this paper, constitutive relationship of reinforced concrete and failure criteria. Third, this article uses ANSYS to establish the three-dimensional entity model of super-long reinforced concrete framed structure which has only one floor and does nonlinear analysis under the temperature difference between internal and external and the overall temperature difference to get the temperature stress distribution characteristics of super-long reinforced concrete framed structure. Then we respectively change the beams and columns, floor of the section size and structure length to do analysis influence of super-long reinforced concrete structure under the temperature difference between internal and external. Four, the paper uses the orthogonal table analysis size change of beams and columns, floor and structure length of super-long reinforced concrete framed structure of the temperature stress influence degree. According to these variables application the paper use right software to get the approximate formula. Last, the paper elaborates specifically the control measures which can reduce the influence of temperature stress of framed structure.This article does the analysis influences of super-long reinforced concrete structure under the temperature effect and gets the conclusion of the reference for the engineering practice.