Lateral Resistance of Unreinforced Masonry Walls Strengthened With Engineered Cementitious Composite

Choi, Hyun Ki; Bae, Baek Il; Choi, Chil-Sung

doi:10.1007/s40999-016-0026-1

Cited by 30 publications

(15 citation statements)

References 4 publications

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“…Two different ECC has been developed with mono PVA fiber with 2.0% volume fraction and hybridation of PP with 1.5% volume fraction and PE with 0.5% volume fraction and applied with spray-able technique. Both ECC mixes performed better in load carrying capacity, ductility, stiffness than the wire mesh retrofitted masonry wall [12] .…”

Section: Introductionmentioning

confidence: 91%

Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

Krishnaraja

Kandasamy²

2018

Period. Polytech. Civil Eng.

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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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Section: Introductionmentioning

confidence: 91%

Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

Krishnaraja

Kandasamy²

2018

Period. Polytech. Civil Eng.

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“…No Fan et al, 2012) 0.19 0.70 0.49 40 (Mazzotti et al, 2014) 0.13 0.65 0.73 2 (Han, 2011) 0.27 0.60 0.66 41 (Mazzotti et al, 2014) 0.13 1.04 0.99 3 (Lei et al, 2013) 0.18 0.60 0.59 42 (Mazzotti et al, 2014) 0.13 1.04 0.95 4 (Xiao et al, 2014) 0.24 0.15 0.44 43 (Mazzotti et al, 2014) 0.13 1.02 0.82 5 (Deng et al, 2015) 0.37 0.50 0.64 44 (Farooq et al, 2014) 0.81 0.50 0.48 6 (Zhang et al, 2015) 0.21 1.20 0.31 45 (Choi et al, 2016) 0.86 0.00 0.05 7 (Zhao et al, 2001) 0.27 1.20 0.67 46 (Gattulli et al, 2017) 0.12 0.50 0.11 8 (Wei and Zhou, 2006) 0.13 0.64 0.29 47 (Martinelli et al, 2016) 0.08 0.50 0.36 9 (Yang et al, 2008) 0 (Wang et al, 2003) 0.13 0.80 0.65 55 (Salmanpour et al, 2015) 0.98 0.40 0.24 17 (Wang et al, 2003) 0.18 1.00 0.73 56 (Salmanpour et al, 2015) 0.98 0.80 0.57 18 (Fang, 2009) 0.28 0.60 0.52 57 (Salmanpour et al, 2015) 0.98 0.60 0.28 19 (Fang, 2009) 0.28 0.30 0.45 58 (De Nardi et al, 2017) 0.19 0.60 0.50 20 (Zhu et al, 1984) 0.07 0.46 0.32 59 (Deng and Yang, 2018) 0.52 0.50 0.29 21 (Zhu et al, 1984) 0.12 0.46 0.38 60 (Deng and Yang, 2018) 0.64 0.50 0.32 22 (Shi, 2003) 0.3 0.9 0.76 61 (Karimi et al, 2016) 0.67 0.17 0.17 23 (Shi, 2003) 0.3 0.22 0.41 62 (Zhou et al, 2013) 0.64 0.60 0.44 24 (Zhu et al, 1980) 0.06 0.06 0.06 63 (Guerreiro et al, 2018) 0.64 0.32 0.24 25 (Zhu et al, 1980) 0.06 0.30 0.16 64 (Zhang et al, 2018) 0.48 0.60 0.33 26 (Zhu e...…”

Section: Orcid Idmentioning

confidence: 99%

Shear resistance estimation for unreinforced masonry walls based on Gaussian process models

Peng

Wei

Gang

et al. 2018

Advances in Structural Engineering

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Uncertainty results in misestimate of the shear resistance of unreinforced masonry walls. The misestimate is difficult to correct using deterministic calculation models even when sophisticated numerical models are used. To address this issue, the authors converted the deterministic calculation models for shear resistance of unreinforced masonry walls into prior Gaussian process models and then collected experimental results to train the prior Gaussian process models. They evaluated the resultant posterior Gaussian process models and found two of them are preferable. The two favorable posterior Gaussian process models can well interpolate the collected experimental results and can predict the shear resistance of the unreinforced masonry walls in the authors' experiments with full information. The interpolation and predication demonstrate that the posterior Gaussian process models can combine and weight prior engineering judgments and observational information from experimental results and then can quantitatively specify the remaining uncertainty of the estimation. In addition, the Gaussian process models are efficient, favorable for reliability analysis, and easily improvable. Therefore, they are potentially useful in engineering practices.

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“…In order to effectively reinforce masonry walls, sufficient bond strength is required on the brick-concrete or brick-mortar interface. For example, Choi et al [13] studied the bonding behavior of the joint between sprayed engineered cementitious composite and masonry, and confirmed the contribution of bond strength to wall integrity. However, to the authors' best knowledge, there is no technical literature on the specific bonding behavior between masonry materials and sprayed mortar.…”

Section: Introductionmentioning

confidence: 96%

“…However, it can also be used to reinforce unreinforced masonry (URM; Table A1 in Appendix A presents a complete list of abbreviations). There have been many studies about existing URM reinforced using sprayed concrete and mortar to obtain earthquake-resistant structures [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Bond Strength Tests under Pure Shear and Tension between Masonry and Sprayed Mortar

2020

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Sprayed mortar or shotcrete is a construction technology that could enhance existing masonry buildings’ resilience by reinforcing low-safety load-bearing walls. Many factors affect the resistance of shotcrete-reinforced structures. One of the most important is the bond strength at the interface between the shotcrete and the reinforced wall. According to previous technical literature, bond strength usually has two evaluation criteria: shear and tensile strength. The experimental campaign described in this article focused on the bond strength between sprayed mortar and three masonry materials without the influence of normal force or constraint, as well as the roughness of these materials. The analysis of these tests focused on determining the relation between bond strength, roughness, and material strength. The analyses revealed that material strength has a more significant effect on bond strength than roughness, and bond strength is related to shrinkage of the materials. On the basis of previous theories, these researchers found that when there is no obvious influence due to normal force and constraint, the shear strength and tensile strength are different, and the shear strength is likely to be the cohesion force of the two materials. Finally, this article concludes with a novel logarithmic relationship between these strengths.

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Lateral Resistance of Unreinforced Masonry Walls Strengthened With Engineered Cementitious Composite

Cited by 30 publications

References 4 publications

Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

Flexural Performance of Hybrid Engineered Cementitious Composite Layered Reinforced Concrete Beams

Shear resistance estimation for unreinforced masonry walls based on Gaussian process models

Bond Strength Tests under Pure Shear and Tension between Masonry and Sprayed Mortar

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