Title:
Evaluation of Shear-Friction Behavior of Cylindrical Pocket Connections
Author(s):
Fatima Vieira, Bruno Vasconcelos, and David B. Garber
Publication:
Structural Journal
Volume:
122
Issue:
1
Appears on pages(s):
3-18
Keywords:
accelerated bridge construction; precast concrete; prefabricated elements and systems; shear friction; substructure connections
DOI:
10.14359/51743289
Date:
1/1/2025
Abstract:
An experimental investigation was conducted to evaluate the
shear-friction capacity of cylindrical pocket connections without
reinforcement crossing the interface, which is a common connection
detail between precast concrete substructure elements. Current
Code expressions for shear-friction capacity include components
for cohesion or aggregate interlock and contribution from steel
crossing the interface or a clamping force. These expressions were
primarily derived and calibrated based on pushoff tests with reinforcement crossing the shear plane, which do not represent the
behavior of the shear plane in a cylindrical pocket connection.
Thirty-four large-scale specimens were built and tested to investigate the shear friction of the cylindrical pocket connection without reinforcing steel crossing the shear plane. This experimental study showed that current Code expressions provided conservative estimates for this connection. A revised proposed theory is presented that more accurately predicts the shear-friction capacity of this connection without interface steel.