国内外大量震后受损建筑物的统计表明，错层结构在中等强度以上的地震作用下，容易在短柱构件和错层部位产生严重的破坏甚至坍塌，从而造成巨大的经济损失和人员伤亡。我国错层结构应用较多，但如何改善此类结构的抗震性能还有待进一步的研究。本文在国内外已有的钢管混凝土构件研究基础上，将钢管混凝土构件应用于错层结构，并对此类结构进行了抗震性能分析。 （1）本文以西安某小型商场的设计为研究背景，结合国内相关设计规范，建立了工程分析模型。设计了带钢管混凝土柱的错层结构，并通过改变错层高度和钢管混凝土柱截面尺寸，基于等轴压承载力和等侧向刚度的原则确定钢管混凝土柱的截面尺寸，另外设计了四个带钢管混凝土柱的错层结构模型。 （2）利用SAP2000程序，建立了五个有限元错层结构工程分析模型，并对各模型进行模态分析和反应谱分析，得出各模型的振型周期、楼层位移和基底剪力等。通过对比各模型的变形和受力特征，分析了各模型的薄弱部位和地震反应效应，达到了抗震规范的相关要求。 （3）通过与试验结果对比，在验证塑性铰特征值确定方法有效的基础上，定义了各构件的铰属性。选取三种地震波，对各模型进行非线性时程分析，得到各模型的位移、基底剪力和塑性铰的发展情况等。通过对比分析各模型结构变形出现的薄弱部位和结构的耗能情况，分析了错层高度和钢管混凝土柱截面尺寸两个变量参数对错层结构抗震性能的影响。 研究结果表明：传统错层结构存在短柱构件、楼板不连续以及错层处传力路径差等问题，导致结构抗震性能较差。采用方钢管混凝土柱代替钢筋混凝土柱，能够有效地改善错层结构的抗震性能，调整错层高度和方钢管混凝土柱截面尺寸，也能较好地改善错层结构的抗震性能，按照等侧向刚度的原理来设计方钢管混凝土柱的截面尺寸，对错层结构变形和受力方面的改善更大。各模型在改善错层结构抗震性能方面，表现最优的设计方案是基于等侧向刚度设计钢管混凝土柱和错层高度为1200mm的错层结构，主要表现在地震作用下，相比于其他模型，该结构具有内力分布均匀、耗能能力强以及结构延性好等优势，能够有效地改善传统错层结构的抗震性能。

The statistics of a large number of damaged buildings after earthquake at home and abroad show that the staggered structure is easy to cause serious damage or even collapse in the short column components and staggered parts under the earthquake of moderate strength or above, which results huge economic losses and casualties. There are many applications of staggered structures in China. It is necessary to study how to improve the seismic performance of the staggered structure. Based on the research of concrete filled steel tubular (CFST) members at home and abroad, CFST members are applied to staggered storey structure and seismic analysis of the structure is carried out. The main work is as follows: （1）Taking a small shopping mall in Xi’an as the design background, a reasonable engineering analysis model is established by combining with relevant domestic design specifications. Based on the principle of equal axial bearing capacity and equal lateral stiffness, the section size of CFST column is determined. In addition, four split-layer structure models with CFST column are designed. （2）By using SAP2000 program, five engineering analysis models of staggered storey structures are established. In the meanwhile, modal analysis and response spectrum analysis are applied in the thesis. Moreover, the mode period, floor displacement and base shear of each model are output. Through comparing the deformation and stress of each model, the weak parts and seismic response effects of each model are analyzed, so as to verify whether the model conform to the relevant earthquake resistance standard. （3）By comparing the test results, on the basis of verifying the validity of the method of determining the characteristic value of plastic hinge, the hinge properties of each component are accurately defined, and the non-linear time history analysis of each model is carried out. The thesis studies the displacement, base shear force and the development of plastic hinge of each model under the action of three seismic waves, compares the weak parts of each model’s structure deformation and analyzes the influence of two variable parameter on the seismic performance of the fault layer structure. The results show that the seismic performance of the traditional split-floor structure is poor because of the short columns, the discontinuity of floor slab and the poor path of force transfer at the split-floor. The seismic performance of the split-layer structure can be effectively improved by the height of the split-layer and the size of the section of the concrete-filled square steel tubular column. The design of section size of concrete-filled steel tubular column adopts the principle of equal lateral stiffness and equal axial bearing capacity, among which the former improves the deformation and stress of the split-layer structure more greatly. In terms of improving the seismic performance of staggered storey structures, the optimal design scheme is based on equal lateral stiffness to design concrete filled steel tubular columns and staggered storey structures with a staggered storey height of 1200 mm, which is mainly manifested in the earthquake action. Compared with other models, the structure has the advantages of uniform internal force distribution, strong energy dissipation capacity and good ductility, thus effectively improving the seismic performance of the traditional staggered storey structure.