Analysis On Stress Of Frame-shear Staggered Floor Structure

With the rapid development of high-rise building, its structure type is changing day by day. Staggered floor structure is one of the well applied and innovative structures. However, people are lack of uniform understanding about it. Especially, conclusion studying on seismic weak part induced by the staggered floor structure has not being perfect.In the paper, analyzing the global stress analysis and weak part strengthening methods of staggered floor structure in frame-shear wall structure designing. Main contents are listed following:(1) Using static analysis methods to study on staggered floor structure modified and before under the conditions of different column concrete strength, floor slab thickness and shear wall’s setting, then concluding three reasonable modified schemes;(2) Optimizing on staggered floor structure with three schemes, then studying on dynamic characteristic of the structure optimized and before with mode-superposition method and time-history analysis method. At last, comparing seismic deform reaction under same load between these two structures. Calculating the results under bidirectional earthquake load with these two methods, comparing the advantages and disadvantages between these two structures based on the calculation.(3) Selecting seismic waves of four typical sites, meanwhile, comparing seismic reaction under different sites between these two structures optimized and before, analyzing the seismic performance of staggered floor structure impacted by different sites.Seen from the studying, that proper concrete strength’s strengthening, shear walls’ setting and floor slabs’setting could improve global lateral stiffness. Several auxiliary measures should be used on the time concrete strength’s strengthened. The shear walls ought not to be set too many in staggered floor structure, and then the first floor slab and proof slab should also be thickened. Staggered floor structure’s optimizing impacted more on its seismic reaction. The staggered floor type of frame-shear structure should be constructed on kind I site, and the next is kind III site.