Nonlinear analysis of flexural-torsion interaction in reinforced concrete frames

A new multi-linear torque-twist model is presented to represent the uncracked, cracked, yielded and post-yielded torque-twist response of reinforced concrete members under pure torsion. This model is combined with axial and flexural behaviour models to investigate the full nonlinear response of reinforced concrete frames under combined actions. Results of the analysis are compared with available experimental data to demonstrate the accuracy of the proposed model. © 2006 by School of Engineering and Technology, Asian Institute of Technology.