%0 Dataset
%T Analysis data set of relationship between strength parameters and internal variables
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/aa70421d-f73f-4ddb-99e1-dff2ef69d992
%W NCDC
%R 10.12072/ncdc.nieer.db2789.2023
%A None
%K Elastoplasty of high-strength concrete;coupling;cyclic loading test;acoustic emission (AE) monitoring;Mohr Coulomb criterion
%X <p>    With the development of material technology, high-strength concrete has been widely used in immersed tube, underwater and deep buried tunnels. It presents elastic, brittle and plastic states under various stress conditions. However, the research on the constitutive model of high-strength concrete is not enough, especially the elasto-plastic coupling property.  In this data set, the elastic-plastic coupling analysis of high-strength concrete is carried out through conventional triaxial compression test and cyclic load test, and the failure process of concrete and related micro cracking behavior during loading are monitored by acoustic emission (AE) technology; Finally, the confining stress function and the plastic internal variable are defined, and the variation of deformation parameters and strength parameters with the plastic internal variable is analyzed. (1) With the increase of plastic internal variable, cohesion decreases and internal friction angle increases. (2) Based on Mohr Coulomb yield criterion, an improved cohesive weakening friction strengthening (CWFS) model is proposed. (3) The expansion angle of concrete is smaller than the internal friction angle, so the elasto-plastic coupling model of high-strength concrete should adopt the non associated flow rule. (4) Based on the test results, an elasto-plastic coupling model is established to provide experimental and theoretical basis for numerical calculation and engineering application.