Numerical study on composite CCSTRCS frame structures under cyclic loading

Abstract

This paper presents finite-element (FE) modeling and nonlinear analysis of moment frames consisting of reinforced concrete columns and steel (composite) beams (RCS) subjected to cyclic loading. A three-dimensional FE model is developed to carry out the nonlinear analysis. Modeling details of the RCS frame structures, composite moment frames consisting of continuous compound spiral hoop reinforced concrete (CCSTRC) column and composite steel beam with novel beam-column joint and the associated constitutive relationships for cyclic loading are presented. Appropriate experimental data available from the literature are utilised to verify the model. Load-displacement responses, cumulative dissipated energy, and damage mechanisms from the numerical simulation are compared to the experimental results. The comparison shows that the numerical model accurately predicts the trend of the response as well as the possible damage mechanisms. The procedure proposed here can be adopted in future studies by researchers and also engineers to assess the seismic performance of composite frame with various dimensions and construction details, especially where test data are not available.