Title:
Bond-Slip Relationship of Beam Flexural Bars in Interior Beam-Column Joints
Author(s):
Hyeon-Jong Hwang, Tae-Sung Eom, and Hong-Gun Park
Publication:
Structural Journal
Volume:
112
Issue:
6
Appears on pages(s):
827-837
Keywords:
beam-column interior joint; bond slip; cyclic loading; simplified bond strength model
DOI:
10.14359/51687708
Date:
11/1/2015
Abstract:
Under cyclic loading, the structural performance of reinforced
concrete (RC) beam-column connections is significantly affected
by the bond slip of beam flexural bars. In the present study, a bondslip model was developed to evaluate the bond slip of beam flexural bars within beam-column joints using simplified bond strength and bar strain. To address the cyclic loading effect, the bond strength was determined from the existing test results of beam-column connections that showed complete bond failure. For verification, the predictions of the proposed model were compared with the existing test results of concrete block specimens and beam-column joint specimens. The results showed that the proposed model predicted the bond strength degradation and bond-slip relationships with reasonable precision. For performance-based design, a bond requirement was proposed as the function of the ductility demand of beam-column joints.