Analytical model and design approach for FRP strengthening of non-conforming RC corner beam–column joints

摘要: Abstract The high vulnerability of existing reinforced concrete (RC) structural systems is often related to brittle failures critical members. Field surveys and relevant scientific studies showed that unconfined poorly detailed beam–column joints were not able resist moderate-to-large seismic events. Several strengthening techniques have been proposed improve the capacity RC joints. effectiveness composite materials, such as fiber polymer (FRP) systems, has demonstrated by experimental tests on joint subassemblies entire systems. This, along with simplicity installation, strongly promoted use material for retrofit structures. However, large number parameters affecting mechanical behavior FRP strengthened makes development reliable models complex. In recent years several proposal advanced, but a simple generalized formulation still lacking. This paper presents new strength model account increase provided in corner A database analyzed assess accuracy model. theoretical approach experimentally determined make this suitable practical applications.