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Dr. Gehan Abd-el-Rahman Ahmed Hamdy :: Publications:

Title:
Experimental Investigation of Unreinforced Masonry Walls with Openings Strengthened by Different Techniques
Authors: Ahmed El-Gendy; Tarek El-Salakawy; Gehan Hamdy
Year: 2018
Keywords: Masonry; Wall Openings; In-Plane Behaviour; Strengthening; NSM Bars; FRP Strengthening; Ferro-Cement
Journal: Civil Engineering Research Magazine (CERM)
Volume: 40
Issue: 4
Pages: 276-284
Publisher: Al -Azhar University, Egypt
Local/International: International
Paper Link:
Full paper Gehan Abd-el-Rahman Ahmed Hamdy_38-2018-CERM-Experimental Investigation of Unreinforced Masonry Walls with Openings Strengthened by Different Techniques.pdf
Supplementary materials Not Available
Abstract:

This paper presents experimental investigation of the effectiveness of different strengthening techniques applied around openings in unreinforced brick masonry walls. An experimental program is conducted where 18 masonry walls of dimensions 1200x1200x110 mm were built using clay brick units and cement mortar. Different strengthening techniques such as glass reinforced polymers sheets and strips, near-surface mounted steel bars and ferro-cement layer were made around the intended opening. In-plane loading is applied vertically on the top of the walls up to the service load level, an opening having dimensions 400x800 mm is made in the wall, then the load is gradually increased until failure. The experimental results of load-displacement behavior, ultimate capacity, cracking pattern and failure mode are presented and discussed. The experimental results demonstrate the efficiency of all the studied strengthening schemes in increasing the wall strength. The ferro-cement overlay was demonstrated to be the most efficient and also economic strengthening scheme. The failure load is almost equal to that of the unopened wall, thus the opening made in the wall do not cause decrease in the wall capacity.

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