The Static And Seismic Behavior Of Multi-story Steel Moment Frame With Interior Leaning Columns And Hinged Beams

In recent ten years, with the development of economy, society andurbanization, people migrate from country to city rapidly in China; in2011theurban population proportion has reached51.3%, which lead to housing shortage."Reducing carbon emissions, low carbon economy development" was put forwardin2009at the Copenhagen UN climate conference, which aimed at melioratingliving environment of the human and other creatures on earth. At the meeting,China promised that to2020the carbon emissions of unit gross domestic productwill be decreased40%-45%than in2005. Urbanization needs a large number ofresidential buildings, but facing a grim situation of protecting environment, so ourresidential industrialization needs energy saving and efficient building structuresystems. The steel structure residence have many advantages to meet thisrequirement, but at present in our country direct construction cost of it is stillhigher than the traditional building structures which restricts the development andpromotion of steel construction.The purpose of this paper is to seeking a lower costof the steel structure system which can meet the needs of the owners and can meetthe requirements of the times.The moment steel frame structure with many excellent performances is moresuitable for residential construction. This paper consider that as long as thestructure has sufficient lateral stiffness to resisting lateral force, there is no need todesign all the beam to column connections to be rigid, partial connections can bedesigned to be flexible instead of rigid connection which can simplify the details,reduce the steel consumption of these connections, reduce the difficulty of construction and engineering quantity, thereby saving cost of construction. Thispaper put forward six types of steel frame structure systems partly with flexibleconnections and studied the Steel Moment Frame with Interior Leaning Columnsand Hinged Beams.Firstly, in this paper the first-order linear elastic analysis method was adoptedto reserch the basic mechanical properties of the new structure contrast totraditional moment frame. By the comprarision, a conclusion was obtained that theSteel Moment Frame system with Interior Leaning Columns and Hinged Beams hassimiliar lateral stiffness as traditional moment frames with the similar steelconsumption of two systems. The performance and collaborative working principleof various parts of the new structure system is revealed. The steel momentframe-cantilever column planar structure model instead of spatial computing modelis put forword.The second-order analysis model including geometrical nonlinear and materiallinear elastic was set up to research the internal forces and deformation of the newstructure system. Several types’ equivalent initial imperfections, stabilitycoefficient, number of storey and other factors to second-order effect of newstructure system were studied. A second-order internal force amplification factorformula is proposed.A point of view that the new structure system has excellent seismicperformance is obtained by static inelastic analysis method (pushover) and directlydynamic time history analysis method.