Study on seismic performance of a super-tall building with different lateral force resisting systems

The super-tall building is very sensitive to the lateral loads including wind load and seismic action, thus it’s important to adopt a reasonable lateral force resisting system to ensure the economy, safety and efficiency of the super-tall building. Two preliminary designs of a super-tall building in Beijing, with different lateral force resisting systems, were taken as the research objects in this paper, and their finite element models were established subsequently. The total material consumptions of these two designs, as well as the material consumptions of each type of components, were calculated and compared. The seismic responses under different seismic hazards and the collapse resistances were also discussed using nonlinear time history analysis and collapse analysis. The results indicate that both designs can meet the seismic requirements specified in the seismic design code. The ‘fully-braced’ design scheme is more economical, whose total material consumption is 11% less than that of the ‘half-braced’ design scheme, while the seismic collapse resistance is 14.8% larger than the ‘half-braced’ design scheme.