Study On Temperature Stress And Design Method Of Expansion Reinforcing Strip In Over Long Concrete Frame Shear Wall Structure

Recently, in china many large public buildings require to cancel expansion joint or set up few expansion joint due to function's request. It leads to arise more and more over long tall buildings reinforced concrete structure. Cracking will be emerged if the designers handle badly for temperature deform and temperature stress in ultra-length reinforced concrete structure. These cracks affect regular operation of the building. Because tall buildings have complicated bodily form, the designers have many difficulties in calculating temperature stress value of tall building reinforced concrete structure. So the researchers and the designers use simplified computing ways, the results are rough. It does not consider temperature reaction in technical specification for concrete structure of tall building and often adopts structure measures. So temperature problem is one of key research problems in over long building structure, now, setting up the expansion reinforcing strip is a new design-construct way to prevent crack caused of temperature in the foundation work. But the way also have many problems such as setting location of expansion reinforcing strip, setting of breadth and quantities of expansion reinforcing strip and so on. These problems directly influence the use of expansion reinforcing strip in the engineering.The paper launches to research on the condition of the background, temperature reaction of real structure with two stories model is imitated on the condition of bearing temperature load through simplifying rationally real structure, what's more temperature reaction on the condition of different Side-displacement rigidity and structural length and slab thickness are researched through analysis of finite element software of ANSYS. Firstly the whole deformation and side displacement rule of over long frame shear wall structure are obtained on the condition of two temperature load, and temperature stress and displacement are studied; Secondly distribution feature and law of the temperature stress of slab in over-long frame shear wall structure on the condition of different Side-displacement rigidity structural length slab thickness are obtained; In the end temperature stress of slab is gone on regression analysis on the basis of result of orthogonal test. Then simplified computation formula of the maximum temperature stress in the slab is obtained on the condition of three temperature loads in f over long frame shear wall structure and the fitting formula is tested through the example. At last, analysis of temperature effect of over long bilateral frame shear wall structure with finite element method is compared to over long frame shear wall structure.In the paper, over long frame shear wall structure install some expansion reinforcing strips are simulated with finite element method .The temperature stress and displacement of the slab added expansion reinforcing strip is analyzed and the relationship of its setting location and width affecting to structural internal force and displacement is studied, and so is studied to the relationship of its width and quantities. In the real engineering it can supply some references and instruction to structural designers.