Title: Investigation of Interface Shear Transfer Using Push- Through Tests

Author(s): Christopher S. Williams, Joshua B. Massey, Oguzhan Bayrak, and James O. Jirsa

Publication: Structural Journal

Volume: 114

Issue: 1

Appears on pages(s): 173-185

Keywords: post-tensioning; shear-friction; shear keys; shear strength; spliced girde

DOI: 10.14359/51689162

Date: 1/1/2017

Abstract:
An experimental program was conducted to investigate the shear-friction behavior at the interface between the precast segments and cast-in-place splice regions (that is, closure pours) of post-tensioned spliced girder bridges. Despite the long history of shear-friction experimental research, few tests have been conducted that represent the surface details and specific interface shear-transfer conditions common at these locations. The experimental program consisted of 11 tests on large-scale push-through specimens. Ten specimens were constructed with the interface surface details that are most common at the cast-in-place splice regions of existing bridges: shear keys and saw teeth. The other specimen had a smooth interface. The objectives of the testing program were to study the effects of each surface detail, examine the influence of interface reinforcement and the compressive force acting normal to the shear plane, and evaluate current shear-friction code provisions when applied to interfaces with details typical of spliced girders.