Application of softened truss model with plastic approach to reinforced concrete beams in torsion

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	Structural Engineering and Mechanics Volume 11, Number 4, April 2001, pages 393-406 DOI: https://doi.org/10.12989/sem.2001.11.4.393
	Application of softened truss model with plastic approach to reinforced concrete beams in torsion
	Jun-Kai Lu and Wen-Hsiung Wu(R.O.C.)
Abstract [Buy Article]
	The present paper discusses the behavior of the reinforced concrete beams subjected to torsion by applying the endochronic plastic model in conjunction with the softened truss model. The endochronic constitutive equations are developed to describe the behavior of concrete. The mechanical behavior of concrete is decomposed into hydrostatic part and deviatoric part. New definition of the bulk modulus and the shear modulus are defined in terms of compressive strength of concrete. Also, new deviatoric hardening function is developed. Then, the endochronic constitutive equations of concrete are applied with the softened truss model for the behavior of the reinforced concrete beams subjected to torsion. The theoretical results obtained based on the present model are compared with the experimental data. The present model has shown the ability to describe the behavior of reinforced concrete beams subjected to torsion.
Key Words
	endochronic model for concrete; reinforced concrete beam; softened truss model.
Address
	Jun-Kai Lu and Wen-Hsiung Wu, Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan 912, ROC.