Quasi-static cyclic in-plane testing of masonry walls strengthened with a single-sided fabric-reinforced cementitious matrix overlay and flexible anchorage

O.S. Türkmen (Corresponding author), B.T. de Vries, S.N.M. Wijte, A.T. Vermeltfoort

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

2 Citaten (Scopus)

Samenvatting

An experimental program was undertaken to assess the effectiveness of a new retrofit concept to improve the in-plane behavior of unreinforced clay brick walls by means of full-scale static-cyclic in-plane tests. The proposed seismic retrofit system combines two standalone retrofit measures for in-plane and out-of-plane strengthening of masonry walls. The in-plane reinforcement consists of a single-sided carbon Fabric-Reinforced Cementitious Matrix (FRCM) overlay, and anchors embedded with a flexible adhesive in the masonry. The out-of-plane reinforcement, which consisted of deep mounted Carbon Fibre Reinforced Polymer (CFRP) strips embedded with a flexible adhesive in the masonry, was included in the study to investigate the possible degrading effects of the deep groove on the in-plane behavior. A total of nine full-scale reinforced masonry walls with three different geometries were tested under three different axial loads. None of the specimens showed shear failure at both the reinforced and the as-built side. Cracking predominantly occurred at the interface between the bottommost bed-joint and the foundation beam. The out-of-plane reinforcement did not affect the in-plane strength, as no vertical shear cracks occurred. Moreover, it was found that the anchors increased both the rocking and sliding resistance of the walls. An analytical model was proposed covering the rocking and sliding resistance of the reinforced walls, providing a good approximation of the experimentally obtained in-plane strengths. Additional pull-out experiments showed that the testing scenario where the tensile forces in the anchor were transferred to CFRP strip, provided a good approximation of the analytically determined anchorage strength.

Originele taal-2Engels
Artikelnummer8
Aantal pagina's22
TijdschriftJournal of Building Pathology and Rehabilitation
Volume4
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - dec 2019

Bibliografische nota

Funding Information:
The authors wish to gratefully acknowledge the support by QuakeShield, a joint venture between Royal Oosterhof Holman and SealteQ Group. The technical assistance and guidance received from the staff of the Structural Design Unit at Eindhoven University of Technology is also gratefully acknowledged. Special thanks to our beloved and retiring colleague Dr. Ir. A.T. Vermeltfoort, who provided insight and expertise that greatly assisted the research. Wishing you a long and joyous retirement.

Publisher Copyright:
© 2019, The Author(s).

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