Optimization Of Multi-storey Industrial Steel Structure Residential Building System

Multi-storey steel structure residence is a new green residential building system,which can meet the sustainable development.With the characteristics and construction features of steel,this new structure makes up the drawbacks of reinforced concrete residential building,such as the heavy weight,the discreteness of material quality and environment pollution.Simultaneously,it has the inherent advantages of industrialized buildings,which is the new direction of housing industry.Aiming at certains problems of the industrialized development of multi-storey steel structure residence,optimal suggestions are given through the theory of structure optimization,the FEM method and contrastive demonstrating method in this paper.The main research is as follow:1.It optimizes an existing multi-storey steel structure residential building through the optimality criteria method.The steel consumption of the beams and columns decreases at the fulfillment of design requirements,which proves that this method is convenient for calculation and has an obvious effect on optimization of steel buildings.2.An optimization method that replaces steel columns of the multi-storey steel frame residential building with concrete-filled steel tubular columns is used.Through the FEM method,the cyclic loading response and seismic response of CFST column-steel beam frame and steel frame would be analyzed.And the different seismic behaviors between these two frame structures would be got.3.Two kinds of methods that reduces pipe diameter or reduces pipe wall thickness can be used in the optimization method that replaces steel columns of the multi-storey steel frame residential building with concrete-filled steel tubular column to reduce the amount of steel.Through the FEM method,the relationship between structural stiffness and the amount of steel were compared when using the above two methods.The result shows that reducing pipe wall thickness is better for reducing the amount of steel with more structural stiffness.4.According to the requirement of fabricated structure components and joint stiffness,the steel beam-to column connection with cantilever beam splicing is built to finite element modeling and analyzed,and compared with all-welded rigid joints.Results show that the steel beam-to column connection with cantilever beam splicing has the same mechanical properties as all-welded joints,which belongs to the rigid joints,and it meets the requirement of industrialized buildings.5.Three different concrete-filled steel tubular column to steel beam connections with cantilever beam splicing are selected and analyzed by FEM method.Results show that the joint with outer strengthened ring board and steel beam through the column has good ductility and bending moment transitivity.Both of them are suitable for industrialized steel structure residence.Design should be selected according to the actual situation and cost.6.Through the FEM method,the cyclic loading response of rigid joint of the CFST column-steel beam frame and steel frame would be analyzed.The different mechanical properties between these two rigid joints would be got.And it is thought that seismic behavior of rigid joint of the CFST column-steel beam frame is better.