Abstract

Info

Title:: Analysis on Splitting Strength of Brazilian Disc Based on Unified Strength Theory

Author(s):: ZHAI Yue; ZHAO Jun-hai; AI Xiao-qin; DENG Zi-chen; School of Geology Engineering and Geomatics, Chang’an University

Keywords:: Brazilian disc test; splitting strength; unified strength theory; concrete; strength criterion; tensioncompression ratio

Abstract:: Based on the unified strength theory, unified splitting failure strength criterion which considering the interplay of two relatively large principal stress was built. The proposed failure criterion was suitable for all materials under different tensioncompression ratio in Brazilian disc test. The derivation results of several strength criteria were got by changing parameters. In order to verify the theoretical formula, the Brazilian disc split test of specimen made of C35 concrete was carried out. Based on the test data, the calculation results of several strength criteria which developed from the unified strength criterion were compared. The results show that the tensioncompression ratio of material and the weighted parameter which are combined intermediate shear stress and normal stress have great influence on the splitting tensile strength of material. Meanwhile, the splitting strength calculated by the maximum tensile strain strength theory and the maximum stress strength theory are the upper and lower limits of all strength theory. The results verify that the unified strength theory is reliable and suitable for Brazilian disc test.