DETERMINING PARAMETERS OF THE JOHNSON-HOLMQUIST CONCRETE CONSTITUTIVE MODEL
Practical and efficient means are developed to determine parameters of the Johnson-Holmquist (JH)concrete constitutive model which is widely used in engineering calculation although some parameters are not so authentic theoretically and experimentally. Firstly, the highly sensitive parameters of the Jh model are identified preliminarily by numerical tests. The three-segment empirical equation-of-state (EOS) suited for concrete with unconfined compressive strength of 30～60MPa is presented by analyzing relevant experimental data from literature. The relationship of cohesive strength between JH model and the Mohr-Coulomb criterion is founded according to the theory of plastic yield surface, and a method through triaxial tests is set up to determine the parameters of the failure surface without assumption. By the method, the parameter groups of failure surface are decided for varieties of concrete with data from experiments and from published literature. Lastly, parameters of the JH model are suggested for engineering computation.
XIONG Yi-bo CHEN Jian-jie HU Yong-le WANG Wan-peng
Northwest Institute of Nuclear Technology, 710024, Xi an, Shaanxi, China
国际会议
25th International Symposium on Ballistics(第25届国际弹道会议)
北京
英文
1517-1524
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）