| Staggered truss frame system is characterized by economy, efficiency and practicability and it has drawn wide attention in both engineering and academic field recently. Staggered truss frame system is more and more widely applied abroad and scholars at home are speeding relative study to put to practice. The paper, referring to foreign codes, carried out aseismic study on Staggered truss frame system by meansof FEM program-ETABS, and drew the conclusion of its aseismic performance.The paper carried out elastic response spectrum analysis on Staggered trussframe system, input two strong ground motion records to carry out elastic and plastic time-history analysi 18-storeyed braced composite truss, and concluded that longitudinal brace can not only increase the rigidity but also reduce drift displacement of the first storey. Tn addition, the paper adopted displacementcoefficiency in push-over method to obtain object displacement, and gave the failuremodes of the two structures respectively.
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