The2#Block B Of Midwest Commodities Trading Center Design And Research Of Hybrid Structural System

This paper mainly combine a engineering project of steel-concrete hybrid structure, thedesign method, the seismic performance of the structure and performance of the design isanalyzed, the main research contents and conclusions are listed as follows.With the structure analysis software PKPM of SATWE and PMSAP program,thethree-dimensional structure model of the Midwest commodities trading center2#block B areestablished, and the model was analyzed and compared to the overall structure. At the sametime the conceptual design of steel-concrete hybrid structure, design method, the structurearrangement, component design and construction measures are discussed. Conclusion: withtwo kinds of different calculation analysis program,the dynamic characteristics of thestructure is basically same, the effective mass coefficient in X, Y direction of each vibrationmode, under earthquake effect and wind load the maximum inter storey displacement anglecan meet standard requirement, the overall performance of the structure better.In X direction and Y direction of three-dimensional model of the structure is analyzedunder rare earthquake of Pushover using PKPM EPDA/PUSH program, and find the structureof the performance of the control point and its corresponding layer displacement, story driftand inter story shear force, and find the weak parts of the structure, the plastic hingedistribution. Based on the verification of structure whether meet the "earthquake does notfall" seismic requirements.The results of the analysis shows that performance of thecorresponding point in the X direction and Y direction, the maximum inter story displacementangle are respectively1/363,1/321,1/100, all of that are less than the standard of upper limit;two directions to the weak parts point loading step occurs in the stiffness changes of sixthlayer is larger, should be strengthened; the plastic hinge structure mainly appeared in the coretube hybrid structure, but it will not cause the structure collapse, meet the requirements thatof "no collapse under strong earthquake".Using PKPM SETWE program, selected seven earthquake waves on the reasonablestructure model (small) in the elastic seismic analysis, and modal decomposition responsespectrum analysis method, to verify the design. Selected three seismic waves and adjustment,are under bi-directional earthquake action under rare earthquake dynamic elastic-plastic timehistory analysis, obtained the curve of shear distribution the inter storey displacement, storydrift and interlayer, and static elasto plastic analysis of mutual verification, results show that:the results of elastic time history analysis consistent calculation and the results of responsespectrum method, can meet the "not bad" small earthquake requirements; dynamic analysisprocess analysis and the results are relatively close to Pushover, the maximum inter storeydisplacement angle is less than the standard1/100, meet the fortification requirements that of "no collapse under strong earthquake".Lastly, to explore the structure of performance based seismic design method, theperformance objectives of the project structure in this paper is the C level, and throughstatistical software to analysis results show that the structure, performance level obtainedmeet the seismic performance objectives set.