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论文类型：期刊论文

发表时间：2017-11-01

发表刊物：STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS

收录刊物：Scopus、SCIE、EI

卷号：26

期号：16,SI

ISSN号：1541-7794

关键字：beam-truss model; collapse; Maule earthquake; nonlinear pushover analysis; nonlinear time-history analysis; reinforced concrete bearing wall building

摘要：The 15-story Alto Rio building built in 2006 in the city of Concepcion, Chile, was the only modern building that collapsed catastrophically during the February 27, 2010 Mw 8.8 Maule earthquake, resulting in eight human casualties. This building was typical of many medium rise reinforced concrete bearing wall buildings designed and built in Chile during the period 1996-2009. Understanding the mechanism that led to the collapse of the Alto Rio building is of high relevance in the earthquake engineering community. For this purpose, a detailed three-dimensional nonlinear model of the as-built Alto Rio building structure was developed in the OpenSees analysis framework using the beam-truss modeling approach. The geometry of the structure was obtained directly from the architectural blueprints. Realistic cyclic material constitutive models were used for the reinforcing steel and concrete materials. This paper describes in detail the development of the building model. Furthermore, it presents the results obtained from a nonlinear pushover analysis and from a nonlinear time-history analysis using a bi-axial horizontal input ground motion generated by blending time-history ground accelerations recorded at an accelerograph station located 1.2 km from the building and time-history ground displacements recorded at a GPS station located 3.7 km from the building.