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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5481
Title: An empirical model for confined concrete after exposure to high temperature
Authors: Zaidi S.K.A.
Sharma, Umesh Kumar
Bhargava, Pradeep
Bhandari N.M.
Published in: Fire and Materials
Abstract: In this study, constitutive relationships have been developed for confined concrete subjected to elevated temperature to specify the fire-performance criteria for concrete structures after exposé to fire. This study extends over a total of 63 circular hoop confined concrete specimens that were casted and tested under concentric compression loading after exposure to high temperature. The test variables studied are the yield strength of transverse reinforcement, spacing of the hoop, and exposure to temperatures from ambient to 800°C. It is shown that all of these variables have significant influence on concrete behavior at different temperatures and further an improvement in the thermal resistance of concrete when confined using transverse steel reinforcement. On the basis of experimental results, a model for confined concrete after exposed to high temperature is proposed to predict the results of residual behavior after thermal cycles. The proposed empirical stress-strain equations are suitable to predict the postfire behavior of confined normal strength concrete in compression. The predictions were found to be in good agreement and well fit with experimental results. Copyright © 2017 John Wiley & Sons, Ltd.
Citation: Fire and Materials(2017), 41(7): 848-856
URI: https://doi.org/10.1002/fam.2421
http://repository.iitr.ac.in/handle/123456789/5481
Issue Date: 2017
Publisher: John Wiley and Sons Ltd
Keywords: confined concrete
elevated temperature
residual strength
spalling
stress-strain model
ISSN: 3080501
Author Scopus IDs: 57194018353
57214359120
14068541600
7103395363
Author Affiliations: Zaidi, S.K.A., Civil Engineering Section, Aligarh Muslim University, Aligarh, India
Sharma, U.K., Department of Civil Engineering, Indian Institute of Technology, Roorkee, India
Bhargava, P., Department of Civil Engineering, Indian Institute of Technology, Roorkee, India
Bhandari, N.M., Department of Civil Engineering, Indian Institute of Technology, Roorkee, India
Corresponding Author: Zaidi, S.K.A.; Civil Engineering Section, Aligarh Muslim UniversityIndia; email: kaleemzaidi@rediffmail.com
Appears in Collections:Journal Publications [CE]

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