Diagonal Compression Test On FRP and Polypropylene Retrofitted Masonry Wallets

摘要

PP-band is a cheap material as compared to FRP with a failure strain of 12% which is a high value as compared to failure strain of CFRP which is 2-4%. PP-band can increase the deformation capacity of structural system by releasing energy through crack propagation. It can hold well even for an intense shaking but can not increase the original shear capacity. While as FRP is an expensive material but can significantly increase and restore the shear capacity of a structural system but the final failure is highly brittle and energy is suddenly released by severe damage and cracking which may lead a quick collapse of structure. Failure mode of the non-retrofitted walls is changed by the application of CFRP and further controlled by the use of PP-band, as PP-band resisted the complete debonding of CFRP from brick surface, imparting more residual strength as compared to only PP-band retrofitted wallet. In case of FRP retrofitted wallets, failure is mostly governed by epoxy debonding or brick surface tensile failure.