Research On Seismic Behavior Of Steel Frame-Bracing Structures In High-Rise Residential Buildings

China’s high-rise residential construction is in a total growth development period,Steel structure housing has become a common structural form with special advantages,The structural layout and seismic behavior of steel frame-bracing structures in high-rise residential buildings have a profound impact on the development of high-rise steel structures.This paper takes a steel structure residence in han dan as the building prototype,With steel frame-bracing as the main structural form.The structure layout scheme of eight different support Settings is determined,PKPM software is used to model and calculate the structure of each structure,the period of mode,stiffness,interlayer displacement,overturning moment and steel quantity are analyzed and compared,And the assembly rate of steel frame-bracing structure of high-rise residential buildings is calculated,the following are conclusions:(1)Take the stiffness ratio as the index,Change from I-steel column to box section column,The maximum stiffness ratio difference increased by 3.65% on average.From small support layout to large support layout,The parameter was increased by 5.82%.From the herringbone support into cross support arrangement,The parameter was increased by 4.89%.So the I-steel column with small herringbone support should be priority selection.(2)Take the interlayer displacement and the maximum interlayer displacement Angle as the indexes,Change from I-steel column to box section column,The maximum displacement decreased by 1.70% on average.From small support layout to large support layout,The parameter was increased by 2.22%.From the herringbone support into cross support arrangement,The parameter was decreased by 1.76%.So the box section column with small cross support should be priority selection.(3)Take the percentage of overturning moment borne by support ac the index,Change from I-steel column to box section column,The percentage of overturning moment borne by support decreased by 0.81% on average.From small support layout to large support layout,The parameter was decreased by 8.45%.From the herringbone support into cross support arrangement,The parameter was increased by 8.18%.So the box section column with big herringbone support should be priority selection.(4)Take the quantity of steel per unit area as the index,Change from I-steel column to box section column,the amount of steel used per unit area increased by6.22% on average.From small support layout to large support layout,The parameter was increased by 4.63%.From the herringbone support into cross support arrangement,The parameter was increased by 3.41%.So the I-steel column with small herringbone support should be priority selection.(5)The assembly rate of steel frame-support structures in high-rise residential buildings can easily reach 50%.It can be rated as prefabricated building and the grade of prefabricated building can be evaluated.And could easily be rated as a higher prefab building.Therefore,the steel frame-bracing structure can be adopted as the priority for the main structure of high-rise residential building.In summary,the high-rise residential can be the priority to use steel frame-bracing structure,and the the I-steel column with small herringbone support should be priority selection.