Mechanical Behavior and Failure Criterion of High Performance Concrete Under Biaxial Tension-Compression Loading Condition

The mechanical behavior and failure criterion of high performance concrete (HPC) subjected to biaxial tension-compression loading conditions were investigated experimentally with a real triaxial testing system. The failure modes, ultimate strength and stress-strain curves of HPC under biaxial tension-compression loading conditions were obtained. Then, mechanical behavior of HPC under different stress ratios were analyzed. Finally, based on the Kupfer's strength criterion for conventional concrete and test results, a novel failure criterion was proposed for HPC under biaxial tension-compression loading conditions.