Aseismatic Performance Research On SRC Frame Structure With A Circular Steel Tube

At present, the seismic behavior research of SRC structure mostly focused on basic components, while the overall performance of structure research is relatively less. This paper adopted the method of static and dynamic elastic-plastic analysis, analyzed the modeling internally with circular steel tube system of high-rise SRC frame structure with different bone ratio,and studied the seismic performance of SRC frame structure internally with circular steel tube.This paper summarized the structure of the elastic-plastic analysis theory and structure of restoring force model, and analyzed the static and dynamic elastic-plastic analysis method of basic principle.12-layers with circular steel tube SRC column of a steel beam combination structure were taken as an engineering example, five kinds of models in the case of five different bone ratios were set up, and SRC columns are given in the value of the stiffness of elastic and plastic phase method.According to the static elastoplastic analysis to five kinds of models with different bone ratio under the action of rare earthquake of8degree(0.2g) and analysis to the floor displacement, the interlayer displacement angle and the development of plastic hinge, it showed that too much bone ratio is bad for the development of plastic hinge and seismic energy dissipative structure, and bone ratio of high-rise SRC frame structure column with round steel pipe should be less than8%.Under the modal analysis of five kinds of models with different bone ratios, the response spectrum analysis under the action of usual earthquake of8degree (0.2g) and dynamic time history analysis under the action of rare earthquake of8degree(0.2g), and the analysis of different rate of bone structure under the action of usual earthquake of8degree (0.2g) between the displacement angle, interlayer displacement and shear force floor conditions and with different rate of bone structure under the action of rare earthquake of8degree(0.2g), interlayer displacement angle of floor displacement and development status of plastic hinge, it showed that the structure of the elastic-plastic deformation can not meet the requirement of the specification when the bone ratio is less than2%, and the angle of the plastic displacement between layers, on the whole, along with the bone ratio increases when the bone ratio less than8%. From comprehensive analysis, it is considered that the economic and reasonable bone ratio of the high-rise SRC frame structure with round steel pipe column should be taken as4%to8%.