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ARPN Journal of Science and Technology >> Volume 7, Issue 1, January 2017

ARPN Journal of Science and Technology


Shear Strength Evaluation of Strengthened Unreinforced Brick Masonry Walls by Using Shotcrete

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Author Sardar Atta Ur Rehman Khan, Mohammad Ashraf, Mohammad Adil
ISSN 2225-7217
On Pages 138-144
Volume No. 5
Issue No. 3
Issue Date April 01, 2015
Publishing Date April 01, 2015
Keywords Shear strength, Strengthening, Stiffness degradation, Shotcrete, Lab-View Software, Buildup thickness



Abstract

Old brick masonry structures have often performed very weak against seismic action. The need for strengthening them against earthquake proposes the idea of using shotcrete. This paper presents an experimental results of diagonal tension test performed on eight un-reinforced brick masonry wall prisms, two were un-reinforced controlled and the remaining six were shotcrete wall prisms with different buildup thickness layers of shotcrete mix. To study their in-plane shear behavior of with & without shotcreting, the wall prisms were made strictly following the masonry practice usually adopted in Pakistan. The controlled wall prisms were loaded to their ultimate resistance and then test was stopped in order to ensure the displacement-transducers safety. The remaining six-shotcrete wall prisms were tested to the displacements level at which the cracks disrupts the overall integrity of the prisms. The usefulness of the proposed strengthening practice was evaluated from the failure mode, &stress-strain relationship of the controlled & shotcrete wall prisms. The test outcomes show that the capacity of the shotcrete wall prisms was increases in a linear fashion with the shotcrete buildup thickness. The test results were compared in terms of shear strength, principle tensile strength,& shotcrete thickness. It is concluded that the technique is very effective in shear strengthening of walls also enhanced the ductile behavior of the strengthened wall prisms.


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