| Due to its good performance in architectural structures concrete-filled steel tube using more and more extensive, and at present for concrete-filled steel tube structure research most concentrated in the member and node, relatively less in the structure of the overall performance research. In addition, the seismic study of whole concrete-filled steel tube structure is still at its preliminary stage, and is not perfect, especially lack for concrete-filled steel tube structure in three dimensional simulation seismic research. And more round concrete-filled steel tube in the study, and less in the study of square concrete-filled steel tubes, so for the square concrete-filled steel tube frame structure research is still needs a lot of work to do. This paper from the following several aspects research in the concrete-filled steel tube frame structures:Application structure analysis software SAP2000were respectively established5layer and9layer concrete-filled steel tube frame structure and9layer reinforced concrete frame structure three-dimensional model. And selecting typical lateral loading mode on pushover analysis, observation model performance under four lateral loading. Observation the structure whether meet the standard requirements of strength and deformation under the action of the monotonic loading, and check the appearance order of the plastic hinge and the plastic hinge distribution situation, find out the weak node of the structure.According to the standard requirement add appropriate seismic waves, respectively for concrete-filled steel tube and reinforced concrete frame structure dynamic elastic-plastic analysis in the frequently and rare earthquake situation. Contrast the earthquake response of concrete-filled steel tube frame structures with reinforced concrete frame structure, analysis the reason of the similarities and differences of structural responses. For future research work provides certain reference. |
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