Steel-concrete Composite Frame Structures Seismic Performance Research

At present, the majority of studies aimed at steel-concrete framework structure’s anti-seismic property are anti-seismic property of combined member, while the study of integrated steel-concrete framework structure is seldom. By vibration table test and finite element analysis, this paper concentrates on the research of anti-seismic property of the structure which is combining round steel pipe-concrete pillar with steel-concrete integrated beam and framework, especially studies the failure mechanism and form of structure under earthquake. And also, the dynamic response of steel-concrete integrated framework is analyzed in theory and conducted in a test room. The main contents include:(1) On the basis of one real building consisted of a 4-storey integrated framework structure, the vibration table test reduces the scale in a ratio of 1:3.During the experiment, we mainly complete the data handle related to dramatic property, acceleration response, displacement response and so on.(2) By taking advantage of SAP2000, the vibration table test model of round steel pipe-concrete pillar steel-concrete integrated beam and framework is built, and the modal, elastic dynamic time-histories and elastic-plastic time-histories analysis is also analyzed. Under the analysis of theory, we conclude structure dramatic property, acceleration response and displacement response. By stimulating in different conditions, we can analyze the effect rule of acceleration response and displacement response, and discuss the failure mechanism and form of structure. And then, by analyzing the stimulated data, we can find that the structure’s seismic response is different under the different seismic wave, and the structure response rule of the same seismic wave in different amplitude value.(3) We choose the appropriate condition from the test, comparing theoretical result with measured result from vibration table. It is proved the practicability of adopting finite element software to stimulate vibration table test. By analyzing, it is concluded that the size of seismic response is the major factor that exerting the effect on the structural failure, and the failure form existed between test and theoretical analysis is discussed.Researches show that model structure produces failure mechanism of strong column and weak beam.