Shear Strength Test of UHPC-NC Bonding Surface

Authors

ZHANG Shichang, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
YAN Donghuang, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
LIU Yun, Hunan Communication Polytechnic , Changsha , Hunan 410132 , China
YUAN Sheng, Hunan Communication Polytechnic , Changsha , Hunan 410132 , China
WANG Shuo, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China

Corresponding Author

颜东煌，男，博士，教授.E-mail：yandonghuang@126.com

Abstract

As a cement-based composite material with excellent mechanical properties,ultra-high performance concrete (UHPC ) demonstrates outstanding performance in tensile and compressive strength,durability,and impermeability.This material is suitable for the reinforcement and repair of normal concrete (NC) bridge structures.To study the shear behavior of the UHPC-NC bonding interface and its reinforcement effect,this paper conducted interface shear tests using Z-shaped specimens and designed a total of six sets of comparative specimens.The influence of parameters such as the planted bar ratio,implantation depth,and bonding surface size on the shear strength was explored.Through experiments,the load –slip curve and the shear strength data were obtained.The results show that:① An increase in the planted bar ratio leads to an improvement in the shear strength of the bonding surface,with the rate of increase gradually slowing down as the planted bar increases.A planted bar range of 1%‒1.5% is optimal;② An increase in implantation depth increases the shear strength,but when the depth reaches (10‒12)d (d refers to the diameter of the reinforcement ),the enhancement effect begins to weaken;③ The size of the bonding surface has also been proven to have a significant impact on shear performance.

Publication Date

8-15-2025

DOI

10.14048/j.issn.1671-2579.2025.04.017

First Page

138

Last Page

143

Submission Date

August 2025

Recommended Citation

Shichang, ZHANG; Donghuang, YAN; Yun, LIU; Sheng, YUAN; and Shuo, WANG (2025) "Shear Strength Test of UHPC-NC Bonding Surface," Journal of China & Foreign Highway: Vol. 45: Iss. 4, Article 17.
DOI: 10.14048/j.issn.1671-2579.2025.04.017
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss4/17

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