楼板刚度对框—剪结构协同作用的影响分析
[Abstract]:Under the action of horizontal load, considering the finite stiffness in floor plane, the floor will deform in its own plane, which results in a great difference between the horizontal shear force distribution of the anti-lateral force member and the calculation based on the rigidity of floor slab. Especially for high-rise structures with transfer layer, due to the discontinuity of vertical anti-lateral force members, the floor bears a large shear force in the redistribution of the internal force of the structure, which will produce obvious in-plane deformation. In this paper, the shear force variation of frame columns with floor stiffness and frame shear structure is studied. On the basis of summarizing the present research situation of high-rise structure with transfer floor when considering the deformation of floor slab and the technical regulations of concrete structure of high-rise building in order to ensure the rigidity of floor slab, the paper summarizes the relevant regulations made on the transfer floor slab. Combined with the calculation of shear stiffness of floor, the main factors affecting the stiffness of floor in plane are summarized. By means of PKPM finite element program, by changing the ratio of length to width and the arrangement of floor opening, different comparative analysis models are established to study the influence of the variation of floor opening on the plane stiffness of floor and its influence law. The change and regularity of horizontal shear force of frame column and shear wall during floor deformation are analyzed. The results show that the shear force of frame-column in frame-shear structure increases rapidly with the increase of in-plane deformation. At the same time, reducing the distance between shear walls and increasing the number of floor shear walls is the most effective means to control the deformation in floor plane. The in-plane deformation of the transfer floor and its upper and lower adjacent floors has a decisive effect on the calculation results of the column shear force of the frame-shear structure under two different assumptions.
【学位授予单位】:河北工程大学
【学位级别】:硕士
【学位授予年份】:2013
【分类号】:TU973.16
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