A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Analytic solution of pull-out failure on bond-slip relationship between deformed rebar and ultra-high-performance concrete
Abstract Numerous studies have explored the bond performance between deformed rebar and ultra-high-performance concrete (UHPC), yet an analytical solution to the bond-slip relationship remains elusive. This study presents an analytical solution of pull-out failure for the staged bond-slip constitutive relationship between rebar and UHPC, taking into account the meso-scale bond properties of fibers. The critical point coordinates for different stages are determined by the analytical solution. Utilizing the elastic mechanic solution of thick-walled cylinder under uniform internal pressure, the fictitious crack model, and the fiber-matrix discrete model, analytical solutions and simplified formulas for bond stress and slip at the critical points are provided respectively. The simplified formulas for predicting bond characteristics are proposed. The bond-slip test data are composed of 107 groups from 15 literatures, and the predictions of different formulas are compared. The average ratios of the theoretical ultimate bond stress and peak slip to the test results are 0.995 and 1.033, with a standard deviation of 0.179 and 0.231, and the error is generally within 20%. Compared with the bond-slip relationship, it is more reasonable that the ascending and descending sections are exponential. Moreover, the parameters in the bond-slip relationship can be calculated by the theoretical predictions of bond characteristics at each critical point.
Highlights Proposed theoretical formulas for ultimate bond behavior considering the meso-scale effects of fibers in UHPC. Simplified formulas were presented for calculating the characteristic values. Establishing an experimental bond-slip database to verify the simplified formulas. An exponential form of bond-slip constitutive model is recommended.
Analytic solution of pull-out failure on bond-slip relationship between deformed rebar and ultra-high-performance concrete
Abstract Numerous studies have explored the bond performance between deformed rebar and ultra-high-performance concrete (UHPC), yet an analytical solution to the bond-slip relationship remains elusive. This study presents an analytical solution of pull-out failure for the staged bond-slip constitutive relationship between rebar and UHPC, taking into account the meso-scale bond properties of fibers. The critical point coordinates for different stages are determined by the analytical solution. Utilizing the elastic mechanic solution of thick-walled cylinder under uniform internal pressure, the fictitious crack model, and the fiber-matrix discrete model, analytical solutions and simplified formulas for bond stress and slip at the critical points are provided respectively. The simplified formulas for predicting bond characteristics are proposed. The bond-slip test data are composed of 107 groups from 15 literatures, and the predictions of different formulas are compared. The average ratios of the theoretical ultimate bond stress and peak slip to the test results are 0.995 and 1.033, with a standard deviation of 0.179 and 0.231, and the error is generally within 20%. Compared with the bond-slip relationship, it is more reasonable that the ascending and descending sections are exponential. Moreover, the parameters in the bond-slip relationship can be calculated by the theoretical predictions of bond characteristics at each critical point.
Highlights Proposed theoretical formulas for ultimate bond behavior considering the meso-scale effects of fibers in UHPC. Simplified formulas were presented for calculating the characteristic values. Establishing an experimental bond-slip database to verify the simplified formulas. An exponential form of bond-slip constitutive model is recommended.
Analytic solution of pull-out failure on bond-slip relationship between deformed rebar and ultra-high-performance concrete
Liu, Yuming (author) / Huang, Yuan (author)
Engineering Structures ; 305
2024-02-14
Article (Journal)
Electronic Resource
English
Analytic solution for the bond stress-slip relationship between rebar and concrete
| British Library Online Contents | 2019