Long High-rise Buildings On The Temperature Problem

At present, expansion and contraction joint is not supposed to be located or at least frequently located in average buildings for the requirements of their functions, so, reinforced concrete structure buildings whose lengths are more than 100 meters are ever-increasing by popular. The temperature deformation and temperature stress in super-length tall reinforced concrete structure buildings, if not properly tackled, may cause the-cracks and damages in structures, and may even affect the normal operation of the structures, if worse. Because of the complex shapes and structures of tall buildings, there exist considerable difficulties in calculating temperature stress of the reinforced concrete high-rise, and that make research fellows and designers simplified calculating methods, but the deducted conclusions are inevitably inaccurate. In China, temperature variations are even not taken into consideration inhigh-rise structure designing at all, just only some construction treatments considered. Therefore, temperature problem is one of vitally important research topics in structure designing of super-length tall buildings. Researches of this-paper are just carried out under such a background, which mostly include several studies below: 2. model research of super-length tall reinforced concrete structure buildingswith Finite Element method.Finite element analysis method is applied in temperature stress calculating problems of super-length tall buildings to make the integral temperature stress analysis in order to overcome the shortages of considerable errors resulted from the simplified hand-made calculating method , and the lacks of structural integrality coming from the local calculations of each component and the other problems similarly involved. Also the modeling of the super-length tall buildings is provided The whole structure of super-length tall buildings is chosen as anobject of study, and a worldwide used large-scale structural analysis program named SuperSAP93 is also chosen to decentralize the structure into elements. The beams and columns of thestructure are modeled as dimensional beam components, and the floor slabs > sheer walls and tube structure are modeled as dimensional slab components. Then the practical integral structural analyzing models of the super-length tall building are made. 2. The analysis of structural temperature distributionThe principles of the calculation of temperature distribution and the attained value of thedifference in temperature are improved. The expression of calculating the horizontal difference in temperatures A t is provided. The equation of the super-length tall buildings with the temperature distribution is formulated, and also the relevant solving strategies are provided. 3. The calculation and analysis of temperature effect of super-length tall buildingsAfter calculation, the temperature effects towards super-length tall buildings are given, and the most disadvantageous case with the effect of temperature is discussed. The super-length tall buildings variation scope of the internal forces of beams, columns and slabs resulted from temperature variation are provided, which gives the conveniences for the design of super-length tall buildings. Then the problems that the research in the past is only concentrated on the theory but its results are not easy to be put into practical designing directly are solved meanwhile.In this paper, "the second long-distance telecom hinge in Zhengzhou " is taken as an object of study by combining theory and practice. The achievements are directly applied to practical engineering.