Research And Design Of Large Span Cantilever Structure Of Zunyi Planning Exhibition Hall

Large Span Cantilever Structure has many obvious characteristics such as cantilevered long distance, since the major low redundancy structures, structural vertical mass and stiffness uneven distribution of local reverse effect with difficulties in design. Especially at the moment when the use of concrete structures, concrete cracking due to poor performance, overhanging concrete roots in the larger bending moment can easily be destroyed, but also increased the difficulty of design and construction.Large-span cable-stayed cantilever concrete frame structure system is set prestressed cable-stayed structure cantilevered end, stay cable presence can help share the cantilevered beam structure vertical load. At the same time, by adjusting the cablestayed prestressed, can artificially control the deformation and internal force distribution structure cantilevered end, which can improve the structural internal force, deformation control, strengthen the role of structural rigidity.This paper takes Zunyi City Planning Exhibition Hall as an example. using the cable-stayed concrete frame structure system, designed with internal pull-pull cablestayed outside layout scheme.Using Midas Gen And SAP2000 finite element analysis software for both cable-stayed arrangement schemes were carried out pretensioned optimization, linear and nonlinear static comparative analysis, comparative analysis of seismic capacity, rare case of Pushover Earthquakes comparative analysis of the two schemes and the structure of the key parts of a special design. The results show that prestressed cables in the presence of the force can be greatly improved Large Span Cantilever Structure cantilevered end, arranged in two structural arrangements is reasonable, both to meet existing regulatory requirements.