Experimental study on interfacial tensile bonding performance of pre-heated cfrp-concrete under fast load

被引：0
|
作者：
Luo W. [1 ]
Xiao Y.-Y. [1 ]
He D.-E. [1 ]
Zhang Z.-H. [1 ]
机构：
[1] School of Architecture, Civil and Environmental Engineering, Ningbo University, Ningbo
来源：
Zhang, Zi-Hua (zhangzihua@nbu.edu.cn) | 2018年 / Tsinghua University卷 / 35期
关键词：
CFRP; Fast load; Interfacial failure; Reinforcement after fire; Strain rate effect; Tensile bonding strength;
D O I：
10.6052/j.issn.1000-4750.2017.06.S059
中图分类号：
学科分类号：
摘要：
Tensile tests of 90 pre-heated CFRP - concrete specimens were conducted under fast load. The influences of three critical parameters on tensile bonding strength were investigated, including loading rate, concrete strength and heating temperature. According to the formula for dynamic tensile strength of concrete suggested by European code CEB-FIP1990 and the formula for the reduced axial tensile strength of concrete after elevated temperature, a model for estimating the interfacial tension bonding strength after elevated temperature was developed and verified. The limit temperature for repair and rehabilitation of concrete component after fire was suggested in terms of different strength grades to concrete. Results show that the tensile bonding strength increases with the increase of loading rate and concrete strength. In the range of 20 ℃ to 500 ℃, the interfacial tensile bonding strength significantly decreases with the increasing heating temperature, but no remarkable decrease is observed over 500 ℃. © 2018, Engineering Mechanics Press. All right reserved.
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页码：307 / 312and324
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