Seismic behavior of reinforced engineered cementitious composite members and reinforced concrete/engineered cementitious composite members: A review

2019 ◽  
Vol 21 (1) ◽  
pp. 199-219
Author(s):  
Lijun Hou ◽  
Ran Xu ◽  
Da Chen ◽  
Shilang Xu ◽  
Farhad Aslani
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Cementitious Composite ◽  
Engineered Cementitious Composite

Enhancing Engineered Cementitious Composite by External and Internal Hydrophobization

2016 ◽  
Vol 677 ◽  
pp. 57-63
Author(s):  
Vladimír Hrbek ◽  
Veronika Petráňová ◽  
Jiří Němeček
Keyword(s):  
Reinforced Concrete ◽  
Environmental Effects ◽  
Structure Design ◽  
Large Strains ◽  
Structural Members ◽  
Cementitious Composite ◽  
Steel Reinforced Concrete ◽  
Engineered Cementitious Composite ◽  
Harmful Substances ◽  
Water Absorbability

Engineered cementitious composites (ECC) are characterized with increased ductility and strain hardening due to its internal structure design. ECC is especially useful for applications where common steel reinforced concrete is not applicable and the structural members undergo large strains or dynamic action. Such conditions are often combined with environmental effects where structures are partly or fully immersed in water possibly containing some harmful substances such as chloride or sulfuric ions. To maintain sufficient durability of the composite it is necessary to decrease its water absorbability. One of the very efficient ways to do this is to use external or internal hydrophobization of the composite as shown in this paper.

scholarly journals Structural Behavior of Reinforced Self-Compacted Engineered Cementitious Composite Beams

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Bashar S. Mohammed ◽  
M. F. Nuruddin ◽  
Muhammad Aswin ◽  
Nursyuhada Mahamood ◽  
Hashem Al-Mattarneh
Keyword(s):  
Reinforced Concrete ◽  
Large Scale ◽  
Concrete Beam ◽  
Failure Modes ◽  
Reinforced Concrete Beam ◽  
Composite Beams ◽  
Experimental Results ◽  
Structural Behavior ◽  
Cementitious Composite ◽  
Engineered Cementitious Composite

Eight large-scale reinforced self-compacted engineered cementitious composite (R-SC-ECC) beams with different steel reinforcement ratios have been designed, prepared, cast, cured, and tested to failure at the age of 28 days. The experimental results have been compared with theoretical values predicted using EC2, RILEM, and VecTor2 models. Results show that failure modes in flexure and shear of R-SC-ECC beams are comparable to that of normal reinforced concrete beam. Nevertheless, contrary to VecTor2, models of EC2 and RILEM are not suitable for predicting reasonable ultimate moments for the beams, while results using VecTor2 model have successfully predicted the failure modes and load-deflection curves for all R-SC-ECC beams. It has been concluded that R-SC-ECC fall in the category of ductility class medium to high which gives advantages of using R-SC-ECC beams in regions susceptible to seismic activities.

Evaluation of reinforced concrete and reinforced engineered cementitious composite (ECC) members and structures using small-scale testing

2015 ◽  
Vol 42 (3) ◽  
pp. 164-177 ◽  
Author(s):  
Bora Gencturk ◽  
Farshid Hosseini
Keyword(s):  
Reinforced Concrete ◽  
Energy Absorption ◽  
High Energy ◽  
Absorption Capacity ◽  
System Level ◽  
Experimental Program ◽  
Small Scale ◽  
Cementitious Composite ◽  
Energy Absorption Capacity ◽  
Engineered Cementitious Composite

The behavior of reinforced concrete (RC) and reinforced engineered cementitious composites (ECC) was comparatively investigated at the component and system levels through a small-scale (1/8 scale factor) experimental program. The logistical and financial advantages of small-scale testing were utilized to investigate a range of parameters, including the effect of reinforcement ratio and material properties, on the response of reinforced concrete and reinforced ECC structures. The procedures pertaining to material preparation, specimen construction, and input motion development that were critical for enhancing the similarity between the scales are provided. Engineered cementitious composite mixtures with different cost and sustainability indices were evaluated. Under cyclic loading, the stiffness, strength, ductility, and energy absorption capacity of columns made of different ECC mixtures were found to be 110, 65, 45, and 100% higher, respectively, than those of the RC columns. The system level investigation through hybrid simulation showed that the ECC structures sustain less deformation under earthquake excitation due to high energy absorption capacity of the material. The differences in cost, sustainability, and structural performance of different ECC mixtures suggest that a careful selection of materials is required for optimal performance.

scholarly journals Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

2018 ◽  
Author(s):  
Ammapalayam Ramasamy Krishnaraja ◽  
Shanmughasundaram Kandasamy
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Volume Fraction ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Uniaxial Tensile ◽  
Fibre Reinforcement ◽  
Cementitious Composite ◽  
Engineered Cementitious Composite ◽  
Flexural Performance

This paper presents the experimental investigation to evaluate the flexural performance of newly developed hybrid Engineered Cementitious Composite (ECC) layer at tension zone around the main reinforcement of beam. Four different ECC mixes are used in the beam to evaluate the flexural performance, hybrid ECC based on the low modulus poly vinyl alcohol (PVA) and high modulus steel short random fibre reinforcement. The aim of hybridation is to improve the flexural, energy absorption and ductility performance of reinforced concrete beams. In addition to the compressive strength, young’s modulus, uniaxial tensile strength and bond strength of ECC mixes are determined. ECC with PVA fibre with 2.0% volume fraction mix is kept as reference mix, hybridation is made with PVA (1.35%) and steel (0.65%), PVA (1.00%) and steel (1.00%) and finally with PVA (0.65%) and steel (1.35%). This hybridization has a remarkable achievement in mechanical properties and in the flexural behavior in ECC layered RC beam. From the results, it has been observed that mono fiber ECC reinforced with PVA of 2.0% and hybrid fiber ECC reinforced with 1.35 % of PVA fiber and 0.65% of steel fiber has reasonable flexural characteristics than the conventional beam.

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