Axial Strength Of Lightweight Self-Consolidating Concrete Columns With Engineered Cementitious Composite

Engineered Cementitious Composite ◽

Axial Strength

Axial load behavior of confined columns with engineered cementitious composite (ECC) wrapping was investigated through experimental, analytical and finite element (FE) investigations. The variables in the study were: geometry (cylindrical and rectangular), presence or absence of longitudinal and tie reinforcement, ECC wrap thickness, types of concrete core (lightweight and normal weight self-consolidating concrete) and type of loading (applied through both core and wrap or core only). The effect of these variables on axial load-deformation response, strain characteristics, failure modes, ductility, energy absorption capacity and axial strength were evaluated. The confined concrete strengths predicted from existing analytical and developed FE models were found to be in good agreement with those of experiments. The axial load capacity and ductility were increased for columns with highest ECC wrap thickness (50 mm) while thinner wrap increased stiffness instead of ductility. Canadian code conservatively predicted axial strength of columns having increased thickness of ECC wrap.

Flexural Behavior of Lightweight Self-Consolidating Concrete Beams Strengthened with Engineered Cementitious Composite

ACI Materials Journal ◽

10.14359/51732635 ◽

2021 ◽

Author(s):

Tayseer Z. Batran ◽

Mohamed K. Ismail ◽

Assem A. A. Hassan

Keyword(s):

Concrete Beams ◽

Flexural Behavior ◽

Cementitious Composite ◽

Experimental and Numerical Study of Engineered Cementitious Composite with Strain Recovery under Impact Loading

Applied Sciences ◽

10.3390/app9050994 ◽

2019 ◽

Vol 9 (5) ◽

pp. 994 ◽

Cited By ~ 8

Author(s):

Moncef Nehdi ◽

Mohamed Ali

Keyword(s):

Shape Memory ◽

Impact Loading ◽

Numerical Study ◽

Absorption Capacity ◽

Strain Recovery ◽

Impact Behavior ◽

Experimental Investigations ◽

Heating Process ◽

Cementitious Composite ◽

An engineered cementitious composite, endowed with strain recovery and incorporating hybrid shape memory alloy (SMA) and polyvinyl alcohol (PVA) short fibers, was subjected to drop weight impact loading. Numerical simulation of the composite’s impact behavior was performed, and the model predictions agreed well with the experimental findings. Numerical and experimental investigations demonstrated that incorporating SMA fibers in the composite yielded superior impact resistance compared to that of control mono-PVA specimens. Heat treatment stimulated the SMA fibers to apply local prestress on the composite’s matrix owing to the shape memory effect, thus enhancing energy absorption capacity, despite the damage incurred by PVA fibers during the heating process. The superior impact performance of the hybrid composite makes it a strong contender for the construction of protective structures, with a potential to enhance the safety of critical infrastructure assets against impact and blast loading.

Structural Behavior of Reinforced Self-Compacted Engineered Cementitious Composite Beams

Advances in Materials Science and Engineering ◽

10.1155/2016/5615124 ◽

2016 ◽

Vol 2016 ◽

pp. 1-12 ◽

Cited By ~ 7

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 ◽

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.

Load and thermal resistance of sandwitched steel-wood composite walling systems infilled with innovative commercial form material

10.32920/ryerson.14661081 ◽

2021 ◽

Author(s):

Ashok Kumar Yadov

Keyword(s):

Axial Load ◽

Failure Modes ◽

Oriented Strand Board ◽

Load Capacity ◽

Width Ratio ◽

Height Ratio ◽

Deformation Response ◽

Axial Load Capacity ◽

Composite Wall ◽

Commercial Form

This research investigated the behaviour of sandwich profiled steel sheet composite wall (PSSCW) and oriented strand board composite wall (OSBCW) with infill commercial form material (CFM). The axial load behaviour of PSSCWs and OSBCWs having different height to width ratio and PSS/OSB-CFM connector spacing was analysed based on experimental results of strength, load-deformation response, load-strain development and failure modes. In addition, flexural behaviour of OSBCW and the thermal conductivity tests on PSSCW and OSWCW specimens were carried-out. The axial load capacity of PSSCW/OSSCW was increased by 946% to 1714% compared to walls without in-fill and decreased with the increase of height to width and connector spacing to height ratio. The existing analytical equations were found to over predict the axial load capacity of both PSSCWs and OSBCWs. The recommendation of this research will understand the axial, flexural and thermal behaviour of PSSCW/OSBCW with CFM infill for practical building applications.

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

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2013-0445 ◽

2015 ◽

Vol 42 (3) ◽

pp. 164-177 ◽

Cited By ~ 9

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 ◽

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.

Performance of engineered cementitious composite covered or wrapped self-consolidating concrete beams under corrosion

Engineering Structures ◽

10.1016/j.engstruct.2020.110801 ◽

2020 ◽

Vol 219 ◽

pp. 110801

Author(s):

K.M.A. Hossain ◽

M.A. Hossain ◽

T. Manzur

Keyword(s):

Concrete Beams ◽

Cementitious Composite ◽

Load and thermal resistance of sandwitched steel-wood composite walling systems infilled with innovative commercial form material

10.32920/ryerson.14661081.v1 ◽

2021 ◽

Author(s):

Ashok Kumar Yadov

Keyword(s):

Axial Load ◽

Failure Modes ◽

Oriented Strand Board ◽

Load Capacity ◽

Width Ratio ◽

Height Ratio ◽

Deformation Response ◽

Axial Load Capacity ◽

Composite Wall ◽

Commercial Form

This research investigated the behaviour of sandwich profiled steel sheet composite wall (PSSCW) and oriented strand board composite wall (OSBCW) with infill commercial form material (CFM). The axial load behaviour of PSSCWs and OSBCWs having different height to width ratio and PSS/OSB-CFM connector spacing was analysed based on experimental results of strength, load-deformation response, load-strain development and failure modes. In addition, flexural behaviour of OSBCW and the thermal conductivity tests on PSSCW and OSWCW specimens were carried-out. The axial load capacity of PSSCW/OSSCW was increased by 946% to 1714% compared to walls without in-fill and decreased with the increase of height to width and connector spacing to height ratio. The existing analytical equations were found to over predict the axial load capacity of both PSSCWs and OSBCWs. The recommendation of this research will understand the axial, flexural and thermal behaviour of PSSCW/OSBCW with CFM infill for practical building applications.

Shear And Flexural Behaviour Of Fiber Reinforced Lightweight Self-Consolidating Concrete Beams

10.32920/ryerson.14654910 ◽

2021 ◽

Author(s):

Ali Rashidian ◽

Khandaker M. Anwar

Keyword(s):

Energy Absorption ◽

Failure Modes ◽

Crumb Rubber ◽

Absorption Capacity ◽

Fiber Reinforced ◽

Flexural Behaviour ◽

Energy Absorption Capacity ◽

Poly Ethylene ◽

Energy Absorbing

This research studied the shear and flexural behaviour of fiber reinforced lightweight self-consolidating concrete (FRLWSCC) beams made of three different fibers such as: High-Density Poly Ethylene (HDPE), Crumb Rubber (CR) and Polyvinyl Alcohol (PVA) compared with lightweight self-consolidating concrete (LWSCC) beams. The performances of all beams were described based on load-deformation or moment-rotation response, strain developments, crack characterization, failure modes, ductility, stiffness and energy absorbing capacity. All FRLWSCC shear beams showed higher ultimate shear resistance, ductility and energy absorption capacity compared to LWSCC beams. All FRLWSCC flexural beams at failure exhibited higher flexural capacity, more cracks with smaller width, higher ductility, higher energy absorption capacity and lower stiffness compared to their LWSCC counterparts. FRLWSCC beams especially made of HDPE fibers showed better shear and flexural capacities besides satisfactory ductility performance. Experimental shear and flexural capacities of FRLWSCC beams were compared with those predicted from Code based and other existing equations.

Axial load behaviour of steel tube columns in-filled with various high performance concretes

10.32920/ryerson.14654235.v1 ◽

2021 ◽

Author(s):

Katie Chu

Keyword(s):

Axial Load ◽

High Performance ◽

Failure Modes ◽

Lightweight Concrete ◽

High Strength ◽

Crumb Rubber ◽

Steel Tube ◽

Axial Strength ◽

Coarse Aggregates ◽

Cfst Columns

This research concentrates on the axial load behaviour of circular, square and rectangular concrete filled steel tube (CFST) columns incorporating high-performance self-consolidating concretes such as ultra-high strength concrete (UHSC), engineered cementitious composite (ECC), lightweight concrete (LWC), and crumb rubber concrete (CRC). Seventy-four CFST specimens with varying slenderness, shape, concrete type and presence of internal bar reinforcements are tested experimentally under axial compression loading. The effect of these variables on axial load-deformation response, strain characteristics, failure modes, concrete confinement and axial strength are evaluated through experimental results. Performance of existing analytical/code based models for axial strength and concrete confined strength is evaluated. Concretes without coarse aggregates including UHSC proved less effective at enhancing axial strength of filled tube columns through confinement. In contrast, confinement in filled steel tube columns was found most effective with the use of concretes with coarse aggregates such as LWC and CRC.