TY - JOUR
T1 - In-Plane Shear Strength Improvement of Hollow Concrete Masonry Panels Using a Fabric-Reinforced Cementitious Matrix
AU - Ismail, N.
AU - El-Maaddawy, T.
AU - Khattak, N.
AU - Najmal, A.
N1 - Funding Information:
Financial support for this study was provided by the United Arab Emirates University under the research Grant No. G00001603. The authors would like to thank Engr. Tarek and Mr. Faisal for their help and support during testing.
Publisher Copyright:
© 2018 American Society of Civil Engineers.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - An overview of an experimental program investigating the effectiveness of fabric-reinforced cementitious matrix (FRCM) to limit the damage in shear critical unreinforced hollow concrete masonry assemblages is presented. The experimental program involved the mechanical testing of the constituent materials and the diagonal shear testing of 16 masonry panels constructed to replicate the masonry types prevalent in nonductile reinforced concrete frames with masonry infill buildings. The test variables investigated included the masonry type, the FRCM fabric material, and the number of FRCM layers. Three FRCM fabrics (basalt, glass, and carbon) and two masonry types (200 and 150 mm thick) were used. The FRCM strengthening changed the failure mode from brittle bed joint sliding to a more gradual distributed diagonal cracking and/or toe crushing, with a shear strength increase of 104-258% for 150-mm thick masonry panels and 69-156% for 200-mm thick masonry panels. A substantial increase in the ductility and energy dissipation capacity was also noted for the FRCM-strengthened masonry panels. The shear stress-strain behavior, deformation capacity, pseudoductility, energy dissipation, and stiffness characteristics were analyzed and discussed. The behavior of the FRCM-strengthened panels was predicted using analytical equations, and the predicted values were compared to the experimental results.
AB - An overview of an experimental program investigating the effectiveness of fabric-reinforced cementitious matrix (FRCM) to limit the damage in shear critical unreinforced hollow concrete masonry assemblages is presented. The experimental program involved the mechanical testing of the constituent materials and the diagonal shear testing of 16 masonry panels constructed to replicate the masonry types prevalent in nonductile reinforced concrete frames with masonry infill buildings. The test variables investigated included the masonry type, the FRCM fabric material, and the number of FRCM layers. Three FRCM fabrics (basalt, glass, and carbon) and two masonry types (200 and 150 mm thick) were used. The FRCM strengthening changed the failure mode from brittle bed joint sliding to a more gradual distributed diagonal cracking and/or toe crushing, with a shear strength increase of 104-258% for 150-mm thick masonry panels and 69-156% for 200-mm thick masonry panels. A substantial increase in the ductility and energy dissipation capacity was also noted for the FRCM-strengthened masonry panels. The shear stress-strain behavior, deformation capacity, pseudoductility, energy dissipation, and stiffness characteristics were analyzed and discussed. The behavior of the FRCM-strengthened panels was predicted using analytical equations, and the predicted values were compared to the experimental results.
KW - Ductility
KW - Fabric-reinforced cementitious matrix (FRCM)
KW - In-plane strength
KW - Seismic strengthening
KW - Unreinforced concrete masonry
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U2 - 10.1061/(ASCE)CC.1943-5614.0000835
DO - 10.1061/(ASCE)CC.1943-5614.0000835
M3 - Article
AN - SCOPUS:85042069811
SN - 1090-0268
VL - 22
JO - Journal of Composites for Construction
JF - Journal of Composites for Construction
IS - 2
M1 - 04018004
ER -