Structural behaviors of ultra-high performance engineered cementitious composites (UHP-ECC) beams subjected to bending-experimental study

Ding, Yao; Yu, Kequan; Yu, Jiangtao; Xu, Sheng

doi:10.1016/j.conbuildmat.2018.05.122

Cited by 102 publications

(29 citation statements)

References 22 publications

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“…Substituting aggregates with wood process waste such as wood chips, flax or hemp was also shown to enhance the mechanical or thermal properties of concrete mixtures [11][12][13][14][15][16][17][18]. Further research on fiber-reinforced concrete reported that the addition of synthetic fibers-such as polypropylene (PP), polyethylene (PE), polyvinyl alcohol (PVA)-or steel fibers could increase the fire resistance, ductility, tensile strength, impact resistance and toughness of concrete mixtures [19][20][21][22]. However, synthetic fibers, which are mainly derived from petroleum-based sources, and steel fibers require energy-intensive and expensive production processes.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Maier

Javadian²,

Saeidi³

et al. 2020

Applied Sciences

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In this study, a sustainable mortar mixture is developed using renewable by-products for the enhancement of mechanical properties and fracture behavior. A high-volume of fly ash—a by-product of coal combustion—is used to replace Portland cement while waste by-products from the production of engineered bamboo composite materials are used to obtain bamboo fibers and to improve the fracture toughness of the mixture. The bamboo process waste was ground and size-fractioned by sieving. Several mixes containing different amounts of fibers were prepared for mechanical and fracture toughness assessment, evaluated via bending tests. The addition of bamboo fibers showed insignificant losses of strength, resulting in mixtures with compressive strengths of 55 MPa and above. The bamboo fibers were able to control crack propagation and showed improved crack-bridging effects with higher fiber volumes, resulting in a strain-softening behavior and mixture with higher toughness. The results of this study show that the developed bamboo fiber-reinforced mortar mixture is a promising sustainable and affordable construction material with enhanced mechanical properties and fracture toughness with the potential to be used in different structural applications, especially in developing countries.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Maier

Javadian²,

Saeidi³

et al. 2020

Applied Sciences

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“…Experimental tests indicate that the tensile strain capacity of improved ECC is up to 12%, possessing similar deformability with rebar (Li et al, 2019a;Yu et al, 2017Yu et al, , 2018a, the tensile strength is in the range of 4-18 MPa, and the compressive strength is in the range of 20-120 MPa (Ding et al, 2018a;Li et al, 2019b;Yu et al, 2018bYu et al, , 2019b. Eventually, this material is named as ultra-high ductile cementitious composites (UHDCCs), given that its magnificent ductility (Ding et al, 2018b;Yu et al, 2018c).…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of two-story ultra-high ductile cementitious composites frame without steel reinforcement

Dong

Zhan

et al. 2020

Advances in Structural Engineering

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This article numerically studies the seismic vulnerability of the frame structure made of ultra-high ductile cementitious composites without longitudinal and transverse reinforcement. A non-linear finite element model is established with the help of Open System for Earthquake Engineering Simulation and calibrated by shaking table test results on an ultra-high ductile cementitious composite-RC frame whose seismic vulnerable parts were replaced by ultra-high ductile cementitious composites without steel reinforcement. Subsequently, an analysis on the structural seismic vulnerability is performed on pure ultra-high ductile cementitious composite frame structure based on the incremental dynamic analysis method. Finally, a seismic vulnerability matrix of the ultra-high ductile cementitious composite frame under various structural limit states is obtained from seismic fragility curves. Under the major earthquake of magnitude 7.5, the probability of ultra-high ductile cementitious composite frame structure under basically intact, slight damage, moderate damage, serious damage, and collapse is 14.2%, 48.1%, 31.7%, 5.3%, and 0.7%, respectively. The achieved results also demonstrate that the ultra-high ductile cementitious composite frame can satisfy the objectivity of “No collapsed under major earthquake” at least for major earthquakes of magnitude 8. It is demonstrated that the ultra-high ductile cementitious composite frame satisfies three-level performance objectivity stipulated in GB 50011-2010 and, thus, preliminarily verifying the feasibility for constructing structures just using high-performance concrete.

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“…Further, the shear strength of specimens increased with the volume percentages of PVA fiber [14]. The structural behaviors of steel reinforced ultra-high performance ECC beams under bending were experimentally explored and the results of the test indicated the feasibility of utilizing their ultra-high performance to substantially reduce or replace the steel bar in structural members [15]. Conforti and Minelli conducted research on the numerical modeling of the shear behavior of deep beams with fibers or no shear reinforcement in order to study the size effect influence on the shear behavior of fiber reinforced concrete (FRC) elements [16].…”

Section: Introductionmentioning

confidence: 99%

Shear Behaviors of RC Beams Externally Strengthened with Engineered Cementitious Composite Layers

Wang

Yang

Pan³

et al. 2019

Materials

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The shear behaviors of reinforced concrete (RC) beams externally strengthened with engineered cementitious composite (ECC) layers were studied and the strengthening effect was evaluated based on a truss and arch model. The beams were designed without web reinforcement in the middle part and ECC was sprayed onto both sides of the beams to the designed thicknesses, which were 20 mm and 40 mm. A series of four-point bending experiments were conducted and analyzed. The development of the shear strain in each side of the beams was recorded by strain rosettes formed with three fiber Bragg grating (FBG) sensors. The thickness of ECC layers, reinforcement ratios, and shear span-to-depth ratios were considered and analyzed. This is an effective way to shear strengthen RC beams with ECC layers. The ultimate load of the strengthened specimen can be improved by 89% over the control specimen. Strengthening an RC beam into an under-reinforced beam should be avoided. The FBG sensors are suitable to measure and monitor the development of shear strain in the side of the strengthened specimen. Based on the truss and arch model, an evaluation of the shear strengthening effect was established and the results agree well with the experimental results.

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Structural behaviors of ultra-high performance engineered cementitious composites (UHP-ECC) beams subjected to bending-experimental study

Cited by 102 publications

References 22 publications

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar

Seismic fragility analysis of two-story ultra-high ductile cementitious composites frame without steel reinforcement

Shear Behaviors of RC Beams Externally Strengthened with Engineered Cementitious Composite Layers

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