Abstract:To test the seismic performance of high-rise steel structures, we used a high-rise steel-frame office building as our research object. Using the finite element model, we analyzed the seismic response of its transverse bracing. As the input wave, we used the El-Centro wave with a peak acceleration of 200 cm/s2. To analyze the seismic simulation response of the building with different slab thicknesses, we used the transient dynamic method and obtained the displacement time-history curves at the top floor of the building. Using SAP200 software, we analyzed the response spectra of the building before and after setting the transverse bracing, then recorded the vertical and horizontal displacements and the story drift ratio. The results are as follows: (1) The displacement of the high-rise steel structure building under earthquake did not increase with increased slab thickness, and displacement fluctuation was obvious at slab thicknesses of 100 mm and 170 mm. (2) After setting the transverse bracing, the horizontal stiffness of the building was obviously improved, and the maximum story drift ratio varied greatly, but was always less than 1/250, which meets the requirements of the relevant building code.