Round Steel Tube Concrete Frame Structure Seismic Performance Analysis And Application

Concrete filled steel tubular column is an artif act that filling concrete in the steel tube, according to the different cross section forms, steel tube concrete column can be divided into the follow ing form:rectangular concrete-filled steel tube colum n, polygon concrete filled steel tube column,square steel tube concrete column and round steel tube concrete column; The characters of conc rete filled steel tubular m ember are h igh bearing capacity, good plasticity and toughness, convenient construction, good fireproof performance and better economic benefit; It has been widely used in railway station, bus station and large industrial workshop. In dom estic, it has a lot of study about its fire resistance, seismic performance, axial com pression ratio, steel pipe wall thickness, strength, but it has less research on the entirety concrete filled steel tube structure, So it is necessary to study seism ic performance of whole concrete filled steel tubular frame structure. Here the main work is a nalyzing the seismic performance of concrete beam structure.There are analysis m ethods sometimes analysis and Pushover analysis m ethod on seismic performance of frame structure; Set up five different column section 6 layers of round steel tube concrete colu mn and concrete beam of the frame structure of the 3 d model, then studied the seism ic performance of the structure. First cycle and stru ctural vibration mode of the structure get base d on modal analysis. Through analyzing the structure based on time history analysis, different seismic wave is set and the reaction of the floors is charged, then compare the model and the change of seismic action with the growth of the height of structure. The structural base shear- vertex displacement curve is get by using the Pushover m ethod. Through comparing the model curve and analyzing the structural deformation and bearing capacity of the c ross section changing, the performance influence was shown about dif ferent cross section of concrete filled steel tubular frame structure seismic.