The Seismic Performance Research And Economic Analysis Of Frame Shear Wall Earthquake-reduction Structure

In recent years, along with the rapid development of the national economy, a great deal of high-rise buildings have been built in our country, and their charac-teristics are higher height, more complicated forms and more co mplete functions. High-rise building is flexible structure, and its inter-storey drift and global displacement under severe earthquake often exceed the allowable limit of code for seismic design of building. In order to ensure that high-rise building structures meet the performance requirements of the code, beam-column-plate section size is commonly increased to improve the overall stiffness of structure by engineers. The increase of beam-column-plate section size can effectively reduce the deformation of high-rise building structures, but earthquake input energy of structures is increased, meanwhile building cost is required to increase. With the invention of various dampers, seismic energy-dissipation storey with dampers has been used in high-rise building structures, the more economical seismic energy-dissipation storey with dampers can also improve seismic performance of structures and dissipate a lot of seismic energy.In this thesis, an actual project of a multi-functional building in Xinjiang as research project, the seismic performance and economic performance of the traditional earthquake-resistant design structure and the earthquake-reduction design structure of the research project are discussed and analyzed, and the superiority of the earthquake-reduction design structure are proved. It includes the following four aspects:(1)The seismic performance of the actual project under the frequently and rarely occurred earthquake was calculated and analyzed. It was found that the inter-storey displacement angles of some floors in the actual building were exceeded. After that, the component sizes of the actual structure were adjusted to meet the requirements of the code.(2)Two earthquake-reduction designs for the actual structure are carried out. One is structure with diagonal-brace damping layers and another one is structure with damped rigid outriggers. The seismic performance of two structures under the frequently and rarely occurred earthquake were calculated and analyzed, and their inter-storey displacement angles can meet the requirements of the code.(3)Seismic effect of structure with diagonal-brace damping layers and structure with damped rigid outriggers under the frequently and rarely occurred earthquake are analyzed and compared. The computing results show that seismic performance of structure with damped rigid outriggers is better than structure with diagonal-brace damping layers.(4)Taking the inter-storey displacement angle( 1/800) as control target, the component sizes of three structures were adjusted to obtain the traditional seismic structure, earthquake-reduction structure A and earthquake-reduction structure B. The economic efficiency of three structures were compared, which shows that the earthquake-reduction structures are better than the traditional one, while A is more economical than B.