Research on Skeleton Curve of CFST Frame Structure

Abstract:

Concrete filled steel tubular (CFST) structure is a new type of structure. According to unified theory, hysteretic model of steel beam, reinforced concrete beam and CFST column have been chosen respectively, then nonlinear structural analysis program called IDARC is employed to determine skeleton curve of the CFST frame structure. Results obtained from program are consistent well with those obtained from experiments. Furthermore, some parameters that affect the restoring force model of CFST structure have been studied, including axial compression ratio, steel ratio, material strength and so on. The results not only provide necessary theory basis for popularizing the CFST structure but play a valuable role to seismic design of CFST structure. The contribution described herein outlines a possibility for simulating the seismic behavior of CFST using the nonlinear program called IDARC. The present work offers a simplified approach for establishing the skeleton curves of CFST frames.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 813-816
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.813
• Online since: October 2012
• Authors: Xiu Li Sun
• Keywords: Concrete Filled Steel Stub, Hysteretic Model, Skeleton Curve, Unified Theory

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