Influence Of Floor Stiffness On Seismic Behavior Of Frame Structures

Since the 21 st century,people are more and more eager to see a variety of architectural forms,whether in the architectural space,architectural function,or the architectural structure has put forward more and more high requirements.With the development of science and technology,the frame structure is used more and more in commercial buildings.It is well known that the frame structure can meet the requirements of large space to a certain extent.In order to meet people's requirements for these buildings,we need to try our best to make some changes in the structure of the building.We can make holes in the floor,and we can open holes in different sizes,shapes and places.However,the floor slab is a force transfer member and a force member,so the effect of the above mentioned hole treatment on the whole performance of the floor slab is particularly important,and the opening of the floor slab not only affects the force of the floor,but also hinders the transmission force of the floor.Therefore,it is necessary to analyze the seismic behavior of floor openings in frame structure system.The main content of this paper is to analyze the seismic behavior of the open-hole frame structure system.The main research approach is to apply the SATWE function in the PKPM software and apply the mode decomposition response spectrum method to the structural model to carry out the analysis and calculation,and finally draw a conclusion.The order of the contents of this study is as follows:(1)Firstly,a high-level structure model is established based on the analysis software of Huaxi shopping mall in Shanxi Province.(2)According to the structure model,several different floor opening areas are set up respectively.(3)The stiffness and the opening area of the floor of the above model are analyzed and calculated by using the analysis software.(4)The calculated data,such as period ratio,displacement ratio,stiffness ratio,bearing capacity,floor shear force and floor displacement,are compared and analyzed,and the seismic behavior of different floor openings and assumed stiffness is obtained.The results show that the structure does not meet the seismic requirements when the ratio of floor openings is increasing and the dimensions of beams and columns are constant.Therefore,the seismic behavior of the structure has to be satisfied by increasing the size of beams and columns.However,it is not economical and practical to change the size of beams and columns while the other conditions are not changed,so it is not recommended that the opening rate of the structure be too large.