Article: Out-of-plane testing of masonry infills strengthened using fibre reinforced matrix with prior in-plane damage Journal: International Journal of Masonry Research and Innovation (IJMRI) 2020 Vol.5 No.3 pp.396 - 422 Abstract: Performance of fibre reinforced cementitious matrix (FRCM) strengthened masonry infills under sequential bi-directional earthquake induced lateral loading, which is far from well-understood, was experimentally investigated herein. A total of eight single bay reinforced concrete frames were constructed with unreinforced hollow concrete masonry infills, of these one was tested non-retrofitted that served as control test assembly and the remainder were strengthened using varying FRCM types and configurations. The test assemblies were subjected to cyclic in-plane loading gradually increasing to 1% story drift, replicating lateral loading due to a moderate earthquake. These already in-plane damaged test assemblies were then subjected to gradually increasing monotonic OOP loading until failure. Resulting damage patterns, failure mechanisms, measured force-displacement response and stiffness characteristics were discussed. FRCM strengthening delayed the onset of out-of-plane cracking, instigated a more controlled failure mode, with strengthened infills exhibiting out-of-plane strength of 1.72.0 times that of the control specimen. Inderscience Publishers - linking academia, business and industry through research

Title: Out-of-plane testing of masonry infills strengthened using fibre reinforced matrix with prior in-plane damage

Authors: Najif Ismail; Tamer El-Maaddawy; Nouman Khattak; Kevin Q. Walsh; Jason M. Ingham

Addresses: School of Engineering, Wellington Institute of Technology, Private Bag 39803, Lower Hutt 5045, New Zealand ' Department of Civil and Environmental Engineering, United Arab Emirates University, Al Ain, UAE ' Department of Civil and Environmental Engineering, United Arab Emirates University, Al Ain, UAE ' Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Indiana, USA ' Department of Civil and Environmental Engineering, University of Auckland, Auckland, New Zealand

Abstract: Performance of fibre reinforced cementitious matrix (FRCM) strengthened masonry infills under sequential bi-directional earthquake induced lateral loading, which is far from well-understood, was experimentally investigated herein. A total of eight single bay reinforced concrete frames were constructed with unreinforced hollow concrete masonry infills, of these one was tested non-retrofitted that served as control test assembly and the remainder were strengthened using varying FRCM types and configurations. The test assemblies were subjected to cyclic in-plane loading gradually increasing to 1% story drift, replicating lateral loading due to a moderate earthquake. These already in-plane damaged test assemblies were then subjected to gradually increasing monotonic OOP loading until failure. Resulting damage patterns, failure mechanisms, measured force-displacement response and stiffness characteristics were discussed. FRCM strengthening delayed the onset of out-of-plane cracking, instigated a more controlled failure mode, with strengthened infills exhibiting out-of-plane strength of 1.72.0 times that of the control specimen.

Keywords: out-of-plane; OOP; strength; damaged; infill; fibre reinforced; matrix.

DOI: 10.1504/IJMRI.2020.107998

International Journal of Masonry Research and Innovation, 2020 Vol.5 No.3, pp.396 - 422

Received: 23 Nov 2018
Accepted: 20 May 2019
Published online: 01 Jul 2020 *

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Title: Out-of-plane testing of masonry infills strengthened using fibre reinforced matrix with prior in-plane damage

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