In order to study the anti-explosion characteristics of a large deep buried tank house,the current dynamic constitutive model of materials can not really reflect the dynamic damage mechanical characteristics of concrete and basalt of the large underground tank house.Therefore,MTS and SHPB experiment were used to support the tank chamber lining concrete and the surrounding rock basalt respectively.The results shows that the concrete is plastic shear failure,while the basalt is brittle fracture failure,and the yield stress,peak strain,elastic modulus and Poisson's ratio are obtained.Through SHPB experimental device,the dynamic performance test of lining supporting concrete and tank chamber surrounding ba-salt was carried out,and the sample failure state and failure rule at different impact strain rate are obtained.The dynamic stress growth factor DIF of basalt and concrete increases with the strain rate,and the good linear relationship between DIF and strain rate.Based on the dynamic modulus,the parameters of Zhu-Wang-Tang's dynamic damage constitutive model are simplified,and the dynamic damage constitutive model of concrete and basalt before the peak stress is constructed,and the rationality of this dynamic damage constitutive model is verified by SHPB experimental data.The research results pro-vide theoretical support for the subsequent research on the anti-explosion characteristics of large deep buried tanks.
a large underground tank surrounding rock and concreteMTS experimentSHPB experimentfail-ure lawdynamic stress growthdynamic damage model
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万方数据
