A Study on Residual Compression Behavior of Structural Fiber Reinforced Concrete Exposed to Moderate Temperature Using Digital Image Correlation

Abstract

Fire ranks high among the potential risks faced by most buildings and structures. A full understanding of temperature effects on fiber reinforced concrete is still lacking. This investigation focuses on the study of the residual compressive strength, stress strain behavior and surface cracking of structural polypropylene fiber-reinforced concrete subjected to temperatures up to 300°C. A total of 48 cubes was cast with different fiber dosages and tested under compression after exposing to different temperatures. Concrete cubes with varying macro (structural) fiber dosages were exposed to different temperatures and tested to observe the stress-strain behavior. Digital image correlation, an advanced non-contacting method was used for measuring the strain. Trends in the relative residual strengths with respect to different fiber dosages indicate an improvement up to 15 % in the ultimate compressive strengths at all exposure temperatures. The stress-strain curves show an improvement in post peak behavior with increasing fiber dosage at all exposure temperatures considered in this study.

Pull-Out Behaviour of Hooked End Steel Fibres Embedded in Ultra-high Performance Mortar with Various W/B Ratios

“…The efficiency of fibres in transferring applied stresses is greatly dependent on the fibre-matrix interface properties of fibre reinforced concrete (FRC) (Abdallah et al 2016;Dinh et al 2016;Lu et al 2016;Tadepalli et al 2015). Therefore, the bond-slip characteristics play a crucial role in controlling the tensile behaviour of FRC (Li and Liu 2016;Srikar et al 2016;Bentur et al 1995).…”

Mechanical Properties and Modeling of Amorphous Metallic Fiber-Reinforced Concrete in Compression

“…Based on the test results, the optimum proportion of hybrid fibers was also investigated to achieve enhanced compressive strength and ductile compressive behavior. Recently, Srikar et al (2016) investigated the residual compressive properties of polypropylene fiber-reinforced concrete exposed to high temperature by using digital image correlation method. It was reported that the polypropylene fibers improved the post-peak residual compressive strength and the toughness of concrete subjected to temperatures up to 300°C.…”

The Use of Advanced Optical Measurement Methods for the Mechanical Analysis of Shear Deficient Prestressed Concrete Members

“…As an optical-numerical full-field measurement method, digital image correlation (DIC) has proven to be an ideal tool for a wide range of applications, including the identification of the mechanical material behavior through inverse modeling (Cooreman et al 2007(Cooreman et al , 2008, structural health monitoring (Sas et al 2012) and the study of the deformation characteristics of a wide range of materials (Ivanov et al 2009;Van Paepegem et al 2009;Srikar et al 2016). During the testing of specimens B103-B109, the stereo-vision digital image correlation technique (3D-DIC) has been adopted to assess the displacements and deformations during the loading procedure.…”