Experimental development of the interfacial bond-slip model between textile reinforced mortar strips and masonry walls

Earthquakes often escalate into disasters due to structures that have not undergone proper engineering evaluations, leading not only to loss of life but also to significant economic, social, and psychological impacts on society. The high number of casualties and property damage resulting from recent major earthquakes in our country, which lies within an active seismic zone, has raised numerous questions regarding the current state of existing structures. Demolishing and rebuilding all structures identified as seismically inadequate is not an economically viable solution. The Textile Reinforced Mortar (TRM) method has gained popularity in the seismic retrofitting of masonry structures. For the accurate assessment of the overall performance criteria of a TRM-based strengthening detail, understanding the bond stress-slip displacement material model at the interface between TRM strips and the masonry surface is crucial. This thesis aims to experimentally investigate the bond -slip material model at the interface between TRM strips and various masonry wall (aerated concrete, hollow clay bricks, and solid clay bricks) and to develop a generalized material model. The experimental study considers variables such as the type of mortar used for bonding the TRM strips to the surface, the width of the TRM strips attached to the masonry surfaces, and the bond length as experimental parameters. Additionally, the use of fan-type carbon fiber reinforced polymer (CFRP) anchors to delay the debonding of TRM strips from the surface is also examined. Based on the results obtained from a comprehensive experimental study, a generalized bond -slip material model for the interface is developed.