Seismic Performance of Composite Structures Made with Concrete-Filled Steel Tubular Members

• Type: Article in International Conference Proceedings Book
• Date: 2018

Authors

Yadong Jiang (Author) FEUP; António Silva (Author) Other; Luís Macedo (Author) Other; José M. Castro (Author) FEUP; Ricardo Monteiro (Author) Other

Conference proceedings International

Title: 16th European Conference on Earthquake Engineering

Pages: 1-12

Other information

Abstract (EN): This paper focuses on the seismic performance assessment of composite steel-concrete moment-resisting framed structures. The structural system consists of circular Concrete-Filled Steel Tubular (CFST) columns and open steel beams. The performance of the composite system is evaluated taking a conventional steel-moment-resisting frame structure made with European profiles as a benchmark. The study comprises the assessment of one five-storey building located in Lagos, Portugal, which is designed according to the seismic design provisions of Eurocode 8. Two numerical modelling strategies, namely a Distributed Plasticity (DP) model and a Concentrated Plasticity (CP) model, have been considered in this research. The seismic performance evaluation is conducted on OpenSees using sets of real ground motions selected and scaled to fit the Eurocode 8 design spectrum. Incremental Dynamic Analysis (IDA) is conducted to study the seismic performance of the selected frame modelled with the two aforementioned models, respectively. The seismic performance of the composite frame is assessed in terms of IDA curves and fragility curves for the collapse limit state. The results show that the composite structure exhibits a good seismic performance. The CP model is found to provide accurate results since it can capture the strength deterioration of CFST members under seismic loading.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12