On the shear behavior of engineered cementitious composites

Abstract

Results of an experimental investigation of structural response of Shear failure is generally brittle in concrete structures. shear beams made of a special class of cementitious composites, Examples of concrete structural failure related to shear referred to as engineered cementitious composites (ECCs), are reloading include bridge deck punching failure [4], corported. ECCs are designed with tailored material structure and have bel failure [5], anchor bolt pull-out [6], and segmental been shoum to exhibit pseudo strain-hardening tensile behavior. The bridge shear key failure [7]. A goal of the work preimproved performance in shear over conventional plain, fiber-sented here is to modify the brittle failure mode by reinforced, and wire mesh reinforced concrete is demonstrated. It is taking advantage of the unique material behavior of suggested that ECCs can be utilized for structural applications ECCs. There has been a lot of research into the use of where superior ductility and durability performance are desired,

Fiber-Bridging Constitutive Law of Engineered Cementitious Composites

“…The fracture toughness of ECC is similar to that of aluminum alloy (Maalej et al 1995) and ECC remains ductile even when subjected to high shear stress (Li et al 1994). High tensile ductility and toughness of ECC material greatly elevates the mechanical performance of reinforced ECC (R/ECC) structure by preventing brittle failure and loss of structural integrity which is usually found in traditional reinforced concrete (R/C) structure under excessive loading.…”

On Engineered Cementitious Composites (ECC)

“…Reduction or elimination of shear reinforcement: ECC has excellent shear capacity, as demonstrated by Ohno shear beam tests (Li et al 1994). Under shear, ECC develops multiple cracking with cracks aligned normal to the principal tensile direction.…”

Shear Crack Formation and Propagation in Fiber Reinforced Cementitious Composites (FRCC)

“…Fig. 1 illustrates the specimen geometry and loading configuration, which is similar to the Ohno shear beam [6] used to investigate shear cracking under various crack angles. Longitudinal reinforcement, which is necessary to avoid flexural failure of the beams but may have an effect on the shear cracking behavior (location, angle), was provided by carbon fiber reinforced polymer plates glued on thetop and bottom faces of the specimen ( Fig.…”