Shear Capacity of Circular Columns Confined with FRP Wrapping скачать в хорошем качестве

Shear Capacity of Circular Columns Confined with FRP Wrapping

Presented By: Alaaeldin Abouelleil, AEDA LLC The importance of the analysis of circular reinforced concrete columns to accurately predict their confined load carrying capacity under full interaction domain (moment-shear force-axial force) is recognized in light of the extreme load event imposed by the current AASHTO LRFD based on the Simplified Modified Compression Field Theory (SMCFT). The confinement effect of steel as well as FRP is also discussed and evaluated for confined circular reinforced concrete columns. The confinement effect of FRP adds another layer of complexity to the shear transfer mechanism. However, there are many similarities between steel confinement and FRP confinement. Using these similarities, a simplified model for FRP confinement is presented. Then, the current procedure adopted by AASHTO LRFD 2014, based on the simplified modified compression field theory, is evaluated for non-prestressed circular concrete bridge piers confined with FRP. This evaluation is compared against experimental data available in the literature. Results are discussed and future improvements are proposed. The main parameters that control the cross-section shear strength are discussed based on the experimental results and comparisons.