Shear Properties and Shear Strength Calculation Method of UHPC-NC Grooved Interface
TIAN Jing
JIANG Xinghong
YANG Xinan
MA Mingjie
LI Luheng
Abstract：Considering the two factors of normal concrete(NC)strength and groove density,the shear properties of the UHPC-NC grooved interface under compressive shear and pure shear stress states were analyzed by oblique shear test and double-sided shear test.Based on the test results,a formula for calculating the shear strength of the UHPC-NC grooved interface was proposed,along with the range of interface inclination angles for oblique shear specimens of such interfaces.The results show that the oblique shear specimen with an interface inclination angle of 30° exhibits NC compression damage or interfacial shear plus NC compression damage,while those with an interface inclination angle of 60° and direct shear specimens exhibit interfacial shear damage.The ultimate strength of specimens increases with the increase of NC strength.With the increase of groove density,the ultimate strength of inclined shear specimen with an interface angle of 30° remains basically unchanged,and the ultimate strength of inclined shear specimen with an interface angle of 60° and straight shear specimen gradually increases.The shear internal friction angle of the UHPC-NC grooved interface depends on the NC strength grade.
Keywords：UHPC-NC grooved interfaceinterface shear strengthoblique shear testdouble-sided shear testgroove density
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 299-306 )