Analytical Evaluation of Straight Bar Anchorage Design in Exterior Joints


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Title: Analytical Evaluation of Straight Bar Anchorage Design in Exterior Joints

Author(s): Parviz Soroushian and Ki-Bong Choi

Publication: Structural Journal

Volume: 88

Issue: 2

Appears on pages(s): 161-168

Keywords: anchorage (structural); beams (supports); deformed reinforcement; bond (concrete to reinforcement); joints (junctions); pullout tests; reinforcing steels; structural steels; Design

Date: 3/1/1991

An analytical model was developed for predicting the pullout behavior of straight beam longitudinal bars anchored at exterior beam-column connections. The model incorporates a local bond constitutive simulation capable of considering the effects of anchored bar diameter, yield strength and spacing, concrete compressive strength, and column pressure on the bond characteristics of deformed bars in confined conditions of exterior joints. The analytical techniques adopted in this study were shown to predict satisfactorily the results of pullout tests on strength bars embedded in confined concrete specimens. An evaluation of the ACI-ASCE Committee 352 development length requirements in exterior joint conditions was made using the developed analytical approach. The results of this analytical evaluation are indicative of the conservatism of the current development length requirements in the confined conditions of exterior joints.