Studies on FRP-concrete interface with hardening and softening bond-slip law

被引：116

作者：

Yuan, Hong ^{[1
]}

Lu, Xusheng ^{[1
]}

Hui, David ^{[2
]}

Feo, Luciano ^{[3
]}

机构：

[1] Jinan Univ, Inst Appl Mech, MOE, Key Lab Disaster & Control Engn, Guangzhou 510632, Guangdong, Peoples R China

[2] Univ New Orleans, Dept Mech Engn, New Orleans, LA 70148 USA

[3] Univ Salerno, Dept Civil Engn, Salerno, Italy

来源：

COMPOSITE STRUCTURES | 2012年 / 94卷 / 12期

关键词：

FRP; Harden; Soften; Load-displacement relationship; Ultimate load; Effective bond length; BEHAVIOR; PLATE;

D O I：

10.1016/j.compstruct.2012.06.009

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This latest experimental study proposes a theory that the bond-slip law for a FRP-concrete interface contains linear hardening and exponential softening. On the basis of this law, the paper studies the mechanic behavior and debonding process of a FRP-concrete interface. Firstly, through nonlinear fracture mechanics, the analytical solutions of the interface shear stress, the axial normal stress of FRP and the load-displacement relationship at the loaded end with the single shear test model of FRP-concrete are acquired. The shear stress propagation as well as the debonding process of the whole interface for different bond lengths could be predicted. Secondly, a simplified interface bond-slip law is used by changing the exponential softening law into a linear softening law. In addition, the analytical solutions for the simplified interface bond-slip law could also be obtained. Finally, based on the analytical solutions of the two bond-slip laws, the influences of the FRP bond length and stiffness on load-displacement curve and the ultimate load, as well as stiffness on effective bond length were discussed, with the similarities and differences between the two bond-slip laws also being studied. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：3781 / 3792

页数：12

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