Reliability Analysis of Debonding in Steel Beams Strengthened with Externally Bonded CFRP Composites

被引：11

作者：

Liu, Meng ^{[1
]}

Dawood, Mina ^{[1
]}

机构：

[1] Univ Houston, Dept Civil & Environm Engn, 4726 Calhoun Rd,Room N107,Engn Bldg 1, Houston, TX 77204 USA

来源：

JOURNAL OF COMPOSITES FOR CONSTRUCTION | 2019年 / 23卷 / 01期

基金：

美国国家科学基金会;

关键词：

Debonding; Carbon fiber-reinforced polymer (CFRP); Steel strengthening; Adhesive; Modeling uncertainty; Reliability analysis; BEHAVIOR; DESIGN; JOINTS; PREDICTION; STRESSES; FATIGUE; GIRDERS; REPAIR;

D O I：

10.1061/(ASCE)CC.1943-5614.0000890

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents the details of a reliability analysis of the debonding in steel beams strengthened with externally-bonded carbon fiber-reinforced polymer (CFRP) composites. A comprehensive experimental database of CFRP-strengthened steel beams and the corresponding double-lap shear joints was compiled. The experimental database was used to quantify the modeling uncertainty for debonding failures based on the analytical formulations that are most commonly adopted in design guidelines. A Monte Carlo simulation (MCS), was used to calculate the resistance factors to achieve a target reliability index of 3.5, for different design scenarios, considering debonding of the FRP as a limit state that would constitute member failure. A sensitivity study was carried out to assess the influence of individual design variables on the reliability index. It was found that the resistance factors vary with adhesives and surface preparation techniques, and the resistance of the representative specimens and modeling uncertainty play the most important roles in achieving a reliable bond.

引用

页数：10

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