| From the perspective of the structure performance, frame-supported structure system is not belong to the structures with good seismic behavior, but because it is able to meet the demand of the diversification of architectural function for economic and social development, it is always an important direction in structure performance research. Staggered truss structure system Building has some remarkable advantages that, for example, building layout is flexible, the stress is clear about, saving more steel. So, we put it into frame-supported structure system, and study its structure performance, which will lead to developments of frame structure system and applications of frame-supported staggered truss system in a larger scale.In this paper, according to the Chinese design specification and related materials, and by using PKPM software, a reasonable structure prototype of frame-supported staggered truss system was designed,and then the experimental model of ratio of1:10was designed and constructed,and then the pseudo dynamic experiments four kinds of working conditions(the seismic wave peak value were0.2g,0.4g,0.62g and1.0g). We study the seismic response of frame-supported staggered truss system through the analysis of the plastic development^deformation properties、base shear response hysteresis properties and stiffness degradation characteristics. The experimental results show that frame-supported staggered truss system has good performance of lateral resistant behavior,and can well meet the specification requirements;and Can embody multichannel seismic defense requirements,and make the structure ductility is guaranteed by controlling structure plastic development process through the design,at the same time we also noted that the structure of energy dissipation ability is still not ideal; the seismic performance of this structure system has obvious ascension space at the design level.Secondly, based on the finite element analysis software sap2000, elastic-plastic time history analysis was carried out on the structure, and then we compared the numerical simulation with the experimental result in order to examine the rationality of the numerical analysis method. Comparison results show that the trends of the structure displacement time history curve of the finite element analysis are consistent with the experiment results, the maximum displacement, interlayer displacement Angle and the maximum base shear values are close to experimental results, which tested and verified the method that using the elastic-plastic time history analysis function of sap2000is feasible for the research of the seismic performance of frame-supported staggered truss system.Finally, using the finite element analysis method previously validated, the model is constructed by using sap2000software. Through analyzing the earthquake response of the structures with different damping ratios, aspect ratios, height of transfer story, and vertical rigidity ratios in transfer story, we have studied the extent of the impact of frame-supported staggered truss structure seismic performance as a result of these different parameters.finally some Suggestions based on the research above are provided in the design of frame-supported staggered truss structures. |
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