Investigation on an effective bond arrangement of insulated CFRP-strengthened flexural members for improved thermo-mechanical performance

Case Studies in Construction Materials

K.A.D.Y.T. Kahandawa Arachchi¹  V. Attanayake²  A. Selvaratnam²  J.C.P.H. Gamage² 

[1] Corresponding author.;Department of Civil Engineering, University of Moratuwa, Sri Lanka;

关键词: Buildings;    CFRP - Concrete composites;    Design charts;    Fire rating;    Insulation;   

DOI  :  

来源: DOAJ

【 摘 要 】

Application of insulation on Carbon Fiber Reinforced Polymer (CFRP) strengthened concrete members in building s is essential to preserve the structural integrity during the fire. Investigation on suitable bonding techniques to minimize the usage of insulation without affecting the structural performance may lead to a cost optimum solution for re trofitting projects. An experimental program was conducted to compare the thermal and structural performance of groove d and external bonding techniques. A total of 15 CFRP - Concrete members were exposed to different fire scenarios with and without insulatio n. A numerical model was also developed to predict the effects of sensitive parameters on the thermo - mechanical performance of CFRP/Concrete composite s under standard fire. The results indicated that the application of CFRP laminates in a groove within the nominal cover of the member can save up to 36% of the insulation than the external bonding technique. This study provides d esign recommendations in the form of charts for easy guidance to select a suitable bonding technique, insulation type and applicatio n depending on the feasibility of the project.

【 授权许可】

Unknown