Multi-linear tensile stress-crack width relationships for hybrid fibre reinforced concrete using inverse analysis and digital image correlation

Bhosale, Aniket B. and Lakavath, Chandrashekhar and Suriya Prakash, S. (2020) Multi-linear tensile stress-crack width relationships for hybrid fibre reinforced concrete using inverse analysis and digital image correlation. Engineering Structures, 225 (111275). pp. 1-19. ISSN 0141-0296

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Abstract

This study aimed to analytically develop tensile stress-crack width constitutive relationships for hybrid fibre reinforced concrete (HFRC). An inverse analysis was performed based on the fictitious crack hinge model to derive the stress-crack width relationship through careful calibrations of model parameters with the digital image correlation (DIC) measurements. The studied parameters included fibre types, volume fraction (Vf) and their combinations. Multilinear stress-crack width relationships for steel, polyolefin and hybrid fibre reinforced concrete with three different fibre volume fractions of 0.50%, 0.75% and 1.00% were derived. The hinge parameters assumed in the inverse analysis were validated with the help of full-field strain measurements using the DIC technique. The relationship between the crack tip opening displacement (CTOD) and the crack mouth opening displacement (CMOD) was verified with the help of the developed equations through the inverse analysis. Afterwards, the simplified equations for predicting the stress-crack width relationships for various types of hybrid FRC were proposed. © 2020 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Suriya Prakash, S.	0000-0003-0319-1773

Item Type:

Article

Additional Information:

The authors would like to acknowledge the financial support from the Utchattar Avishkar Yojana (UAY) Scheme through Sanction order number: UAY_IIT_008 of Indian Government . The authors gratefully acknowledge the financial support given by the Department of Science and Technology, India . Grenix India Limited donated the materials required for the experimental work. The authors duly acknowledge their support.

Uncontrolled Keywords:

Crack length; Crack opening; Digital image correlation; Fracture behaviour; Hybrid fibres; Macro-synthetic fibres; Multi-linear stress-crack width model; Steel fibres

Subjects:

Civil Engineering > Construction & Building Technology
Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

15 Nov 2022 05:53

Last Modified:

15 Nov 2022 05:53

URI:

http://raiithold.iith.ac.in/id/eprint/11263