Behavior of precast CECFST column-to-column connection under compression

• Main Author: Lim, Jun Guang
• Other Authors: Tan Kang Hai
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2022
• Subjects: Engineering::Civil engineering::Construction management
• Online Access: https://hdl.handle.net/10356/157900
• Institution: Nanyang Technological University

This paper studies the compressive behaviour of precast concrete-encased concrete-filled steel tubular (CECFST) columns. An experimental programme was conducted on three precast CECFST column-to-column connections and one cast-in-place (CIP) connection under axial and uniaxial eccentric compression. The test results including ultimate failure loads, load-strain curves, and failure modes were presented. It was found that the peak load, maximum moment, and displacement ductility of precast CECFST columns were higher than CIP CECFST columns. A simplified method containing simplified stress distributions and simplified formulas for predicting the cross-section resistance of precast CECFST column-to-column connection was proposed. The test results and the predicted strength were then used to evaluate the applicability of EN 1994-1-1 on the precast connection, and generally, good agreement was achieved. Finally, a general design approach for the precast connection was developed.