Seismic Analysis Of The Prefabricated Steel Frame Structure With Diagonal Bracing Joints

With the rapid development of China's economy and society,the construction industry has become a pillar industry of the national economy.After 40 years of reform and opening up,the factors such as population,resources,environment and technology have experienced great changes.The transformation and upgrading of the construction industry is becoming more and more urgent.The industrialization of housing is an important direction of the transformation of the construction industry,and the assembly architecture has a great opportunity for development.Fabricated steel structure is a kind of important industrial building.Compared with other fabricated buildings,it is more consistent with the requirements of sustainable development.After years of development,a large number of experimental studies have been carried out on the assembled slanted braced steel frame structure(also known as BSB structure).A large number of research results have been obtained,and significant progress has been made.However,the optimal layout of the Diagonal Bracing,the study of the control load on the structure based on the performance and the application of the structure are extended.The scope and other aspects need to be further expanded.In this paper,the performance of fabricated steel Frame Structure with diagonal bracing joints is studied and analyzed from the following aspects.(1)a brief introduction is given to the fabricated steel frame structure with diagonal bracing joints(BSB frame structure).(2)comparing the stress and deformation characteristics of the BSB frame,the supporting frame and the rigid frame,the characteristics of force and deformation on nodes and those on eliments of BSB frame are obtained.The different arrangement modes of the inclined braces are studied,and the optimum arrangement quantity and optimal placement position of the inclined support are obtained.(3)30-storey BSB structure building model is developed to analyze the stress and deformation of various working conditions,and the main control load is obtained.(4)select the appropriate horizontal seismic acceleration time history,study the relationship between deformation and time,force and time of 30-storey model under the acceleration time history of the earthquake to obtain the maximum of time history.Compared with the results of earthquake wave simulation test cating on 30-storey model by shaking table,the consistency between the analysis and the test is verified.(5)apply BSB framework to solve practical problems,introduce actual cases,and widen the application scope of BSB structure.