Journal of Composites for Construction Design of FRP-Strengthened Infill Masonry Walls Subjected to Out-of-Plane Loading

4 FRP strengthening systems for infill masonry walls are typically designed to resist flexural stresses due to out-of5 plane pressure. Previous research has shown that there are potential premature failure mechanisms due to shear 6 sliding of the infill, which could reduce the effectiveness of the strengthening system. Current design guidelines for 7 strengthening of masonry walls with fiber-reinforced polymers (FRP) do not include guidelines for infill masonry. 8 This paper presents a rational approach for the design and analysis of FRP-strengthened infill masonry walls 9 subjected to out-of-plane loading, including the effect of using FRP end anchorage. The approach is based on 10 consideration of four potential mechanisms: arching, shear sliding, debonding of the FRP in the overlap region, and 11 failure of the FRP end anchorage system. Predictions based on the proposed rational approach agree well with the 12 measured values from two experimental programs. 13 14 CE DATABASE SUBJECT HEADINGS 15 Fiber reinforced polymer, Walls, Masonry, Rehabilitation, Composite materials, Anchorages, Lateral pressure, 16 Design 17 18 INTRODUCTION 19 Retrofitting of masonry infill walls with fiber-reinforced polymers (FRP) has recently been considered as an 20 effective system to increase the strength and ductility of masonry structures. The use of FRP strengthening can 21 reduce the risk of collapse under extreme loading conditions such as possible differential pressure caused by a 22 tornado. Current guidelines for strengthening of masonry walls with FRP, such as ACI 440.7R-10 (ACI Committee 23 440, 2010), do not include guidelines for infill masonry. This paper presents a rational approach for the design of 24 1 Postdoctoral Scholar, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State University, 2414 Campus Shore Dr., Campus Box 7533 Raleigh, NC, 27695. E-mail: [email protected] 2 Distinguished Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State University, 2414 Campus Shore Dr., Campus Box 7533 Raleigh, NC, 27695. E-mail: [email protected] *Manuscript Click here to download Manuscript: Lunn_Rizkalla_ASCE.docx