Selection And Design On Reduced Beam Section Welding Collection Of Concrete-Filled Steel Square Tubular Column And Steel Beam

As one of new composite structures in the field of civil engineering, concrete—filled rectangular steel tubular (CFRT) structure has the Characteristic of high capacity, light self-weigh, construction convenience, esthetic appearance and economic fabrication cost, etc. Thus, such structure has a more extensive application prospect in the skyscraper in China. However, at present, the problem that deters the application and development of concrete—filled rectangular steel tubular in China is short of deeper research, so it have very important theoretical meaning and application value that launch the research on joints between CFRT columns and steel beams of skyscraper study, and put forward the rational and effective joint structure proposal.Based on the experiments and beam-column joints of existing reduced beam section, this paper have suggested other forms of reduce beam section. Having adopted the theory analytical method of finite element, the issue has carried on systematic analysis to the new form of beam-column joints of reduced beam section, which mainly contains the following work:The text put forward 11 new joints forms of concrete-filled rectangular steel tubular column-beam, and go on the theoretical research of finite element to the new joints, mainly analyzing the Load - Displacement curve of various joints of reduced beam section, outside effect of maximum Von-Mises of beam end under the level loading, Mises stress distribution of the beam-column joints and the place of largest stress of beam end, adjust reduce size of all form according to these parameter, until these parameters achieve maximum efficacy, and finding best and good from the adjusted model by the capacity behaviors under monotonic loading, according to capacity behavior, convenience to construct, impact on shaping building interior decoration result and require of seismic behavior of building site etc., obtain recommend model of this text, spend non-linear finite element analyze software ANSYS to analysis the capacity behavior of recommend model under cyclic loading, put forward the design suggestion of new joints of reduce beam section finally.