Study on modeling of cyclic elastic-plastic constitutive law for SBHS500

Abstract

This paper presents the results of material tests and analyses to support the selection of constitutive laws and material parameters for reproducing the cyclic elasto-plastic behavior of SBHS500, a high-performance steel for bridges, in steel members using commercial structural analysis software. Targeting on three types of constitutive laws with different expressions of strain hardening, material parameters were selected for each of them under multiple conditions to find the appropriate method for determining material parameters in terms of the reproducibility of test results. The results of cyclic elasto-plastic loading analysis using the identified material parameters for a four-sided simply supported plate as the basic element of a steel member showed the trend of the analytical results with each constitutive law.