Influence Of Column-to-bean Strength Ratio Of Yield Column’s Joints On Seismic Performance Of Concrete Filled Tube Moment-resistant Frames

2011off the Pacific coast of Tohoku earthquake with magnitude9.0happened offthe western Pacific coast of eastern Japan, and this the most enormous earthquake inJapanese earthquake history hit nearly most of eastern Japan. This great earthquake andlatterly caused tsunami had taken extremely large damages on people’s life andinfrastructures. But Concrete-filled Steel Tubular Structures perform excellent seismicbehavior in this earthquake. Many people are safety living in these structure buildings.Concrete-filled Steel Tubular Structure, a kind of structural systems, owing to itsperfect seismic behavior, excellent economic benefits, is used in more and morehigh-rise buildings. Although many scholars have been researching on the mechanicalbehavior of individual members, few concentrate on the performance of wholestructure.For Concrete-filled Steel Tubular moment-resistant frame structure, there are twoforms of yield mechanism. One is column yield mechanism; the other is beam yieldmechanism. This paper proposed a new kind of column yield mechanism which permitsthat the plastic deformation occur on parts of Concrete-filled Steel Tubular columns,effectively absorbing seismic energy, ease the end of the beam’s plastic deformation. Itis called parts of column yield mechanism.First of all, theoretic of concrete-filled steel tubular is introduced in the firstchapter. This chapter illuminates the history of pushover analysis method and dynamichistory analysis method. Secondly, the layer column-to-beam strength ratio is defined inthe second chapter, and Concrete-filled Steel Tubular Moment-resistant Frames aredesigned based on the ratio. Later on, three-dimensional model are adopted to conductthe elastic-plasticity pushover analysis and dynamic history analysis based on finiteelement method with the soft of ABAQUS.It is obvious to obtain the relationship curve of load and story-drift angle,story-drift angle and story relationship, and plastic hinge and research on the nonlinearresponse under severe earthquake, study the injuries of the yield columns. The results indicate that column-to-beam strength ratio of yi eld columns joints play s an importantrole to the se ismic perf ormances of concrete fille d tube moment-resistant fr ame...