The Nonlinear Static Analysis Of The Framework Supporting-Staggered Truss Steel Structure System

Abstract:Framework supporting-staggered truss steel structure system is a new steel structure which is practical, economic and efficient. By function of transfer floor, this system combines framework supporting bottom with upper staggered truss system to give full play of the advantage of the two and improve the overall work performance of the structure, which increases the use of the whole space and enhances the lateral and vertical stiffness of the structure.Static pushover analysis method confirms the elastic-plastic seismic performance or elastic-plastic seismic response through the results of the pushover analysis. This method is a simple and efficient method to evaluate the seismic capability of the structure which essentially is a static nonlinear method. This method avoids the compliance of the nonlinear dynamic analysis, and has a good accuracy the same time. As we can see, this method has good theoretical and engineering value.This article analyzes a few framework supporting-staggered truss steel structure models and the seismic capability of these different models when they are under the action of the earthquake. In this article, the force controlling method is used. We impose the same vertical load on the structure when applying lateral horizontal load and displacement function along the height distribution of the structure the same time. In this case, some factors are analyzed to see their impacts on the elastic-plastic seismic performance of the framework supporting-staggered truss steel structure. This research can provide certain reference for evaluating elastic-plastic performance of the high-rise structure.A12layer framework supporting-staggered truss steel structure model is set up through comparing the results of the study. When the Static pushover analysis method is used on this model, the local damage happened before the overall damage and the energy dissipation of all the frame members is fully given played to. This also proves that this system has higher safety reserve capacity and good seismic performance. The validity of the conclusion is proved also.