Experimental and numerical investigation on the role of interface for crack-width control of hybrid SHCC concrete beams. (15th January 2022)

• Record Type: Journal Article
• Authors: Mustafa, Shozab; Singh, Shantanu; Hordijk, Dick; Schlangen, Erik; Luković, Mladena
• Is Part Of: Engineering structures. Volume 251:Part A(2022)
• Publication Date: 2022-01-15
• Subjects: Hybrid Reinforced SHCC Concrete Beams -- Interface -- SHCC -- Cracking -- Lattice Modelling; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2021.113378
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Experiments on Strain Hardening Cementitious Composite (SHCC) and hybrid beams. Two types of SHCC and four types of interface treatment are varied in hybrid beams. Hybrid beams show improved crack control over conventional reinforced concrete beam. With strong interfaces, cracks in SHCC exceed 0.3mm after yielding of reinforcement. Beams are simulated using lattice model and its potential/limitation is highlighted. Abstract: Hybrid application of conventional concrete and Strain Hardening Cementitious Composite (SHCC) is recently shown to be promising for crack width control. In this paper, a combined experimental and numerical study is performed to validate the concept and to study the effect of interface treatment on crack width control. The interface is varied between smooth, profiled, partially debonded and completely debonded surfaces. The beams are tested under a four-point bending configuration. The crack development is monitored using digital image correlation throughout the loading, and maximum crack width of 0.3 mm at the surface is taken as the limiting criterion for analyses. The hybrid and control beams are simulated using the lattice model. Both experimentally and numerically, it is observed that stronger interfaces enable the composite action in the hybrid beams and provide better crack width control compared to the artificially weakened interfaces.