上海环球金融中心大厦弹塑性时程分析

Elastoplastic time-history analysis of Shanghai World Financial Center Building

在材料应力-应变关系的层次上,进行了高层钢筋混凝土结构的弹塑性时程分析。采用两种非线性宏观单元———梁柱单元和墙单元,单元截面分析采用纤维模型。在计算单元刚度矩阵时,采用子结构技术,从而实现了一根柱或一根梁采用一个非线性梁柱单元来模拟。编制了高层钢筋混凝土结构弹塑性时程分析程序,且用该程序对上海环球金融中心大厦振动台模型结构进行了分析,并与试验数据进行了对比。最后对该大厦原型结构进行了弹塑性时程分析和抗震性能评价。

Based on the stress-strain relation of the materials, study on nonlinear time-history analysis for tall reinforced concrete structure is carried out. Two nonlinear macro elements including beam-column element and wall element are established, fiber model is used for section analysis of element. The substructure technique is introduced to calculate the stiffness matrix of elements, therefore, simulation of a column or a beam with beam-column element is realized. A elastoplastic time-history analysis program for tall reinforced concrete structures are developed. Elastoplastic time-history analysis for the shaking table test model of Shanghai World Financial Center Building is carried out, the contrast researches for theoretic analysis and test data are completed. Elastoplastic time-history analysis for the prototype structure of the building is accomplished and the seismic performance of the structure is evaluated.