Application research of limiting strain energy strength theory in strength calculation of concrete

• 1、School of Mechanical and Electrical Engineering, Central South University
• 2、School of Civil Engineering and Architecture, Central South University

Abstract：In this paper, a modified algorithm of limiting strain energy strength theory used in strength calculation of concrete is proposed; the modified coefficient is also obtained according to the calculation results of limiting strain energy strength theory. The strength of various concrete, that at normal and high temperature or after freeze-thaw cycles, under principal stress state of tensile, compressive, tensile-compressive is calculated using the modified algorithm. The theoretical calculation results have high precision, which indicates the new algorithm is applicable for strength calculation of concrete. Also, the theory explains the experimental phenomena and law of concrete under biaxial or triaxial tensile, biaxial or triaxial tensile-compressive stress state, which can not be explained by current existing strength theory or criterion; it provides a new theory for strength design and calculation of concrete.

Keywords： limiting strain energy strength theory concrete strength calculation application research