Optimization of tensile strain-hardening cementhious composites for tensile strain capacity

The synergistic action of a cementitious matrix and fibres can result in strain hardening in tension. The accompanied tensile strain capacity can be an important design parameter for strain-hardening cementitious composites in order to prevent the localization in a single crack and to assure that the stress is at least the tensile strength o f...

Numerical Investigation on Time-Dependent Flexural and Shear Crack Growth: Finite Element Modelling

Crack initiation, crack growth and time-dependency of the crack in unreinforced and reinforced concrete have been an interesting topic for decades. Parallel to the research on the ‘shear capacity of concrete beams under sustained loading’, in which the shear capacity of large-scale beams with longitudinal reinforcement under high sustained...

Experimental Investigation on Time-Dependent Flexural Crack Growth: Experimental tests and Analytical Model

The experimental investigation concerns to the behaviour of plain concrete beams with a single notch under sustained loading. The notch is located at the bottom in the middle of the beam. In order to get insight into the short-term capacity of the beams, nine specimens were tested in short-term loading. The experimental program comprised four...

Shear Capacity of Concrete Beams without Shear Reinforcement under Sustained Loads: Experimental Tests

Concrete is one of the oldest and most widely used construction materials in the world and possesses many unique qualities such as versatility, aesthetic appeal, eco-friendliness, cost-effectiveness and availability. Increasingly, architects and engineers are making concrete their material of choice. Its strength, durability and natural thermal...

Shear Capacity of Concrete Beams without Shear Reinforcement under Sustained Loads: Literature Survey

Concrete is a multiphase granular material consisting of aggregate particles of various sizes and irregular shape, embedded in hardened cement paste. The physicochemical processes during the hardening of the cement cause air voids, micro cracks and interfacial bond micro cracks. As a consequence of this heterogeneous structure, concrete displays...

Shear Capacity of Concrete Beams without Shear Reinforcement under Sustained Loads: Experimental Results

Concrete is a multiphase granular material consisting of aggregate particles of various sizes and irregular shape, embedded in hardened cement paste. The physicochemical processes during the hardening of the cement cause air voids, micro cracks and interfacial bond micro cracks. As a consequence of this heterogeneous structure, concrete displays...

Combined effect of fibers and steel rebars in high performance concrete

In this paper a brief overview on the effect of tension stiffening in normal strength concrete and High Performance Fiber Concrete (HPFC) is given. On the basis of an existing model, several simplifications are proposed to describe the post-cracking performance of HPFC, and a simplified model for practical application is developed. This model is...