Experimental and Numerical Study on the Seismic Performance of Precast Bridge Column with an Improved Grouted Corrugated Duct Connection Design

Abstract

<p>In this paper, an improved connection design of the precast bridge column is proposed, including new design of grouted corrugated steel duct and a shallow recess pocket at the top of footing connection for the assembly of precast concrete bridge columns, which has a good seismic performance, durability and facilitate constructability. The improved grouted corrugated steel duct which can increase the bonding mechanism and facilitate constructability expected to perform better than conventional corrugated galvanized steel ducts used for post-tensioning applications. Finite element analysis is then conducted. It is found that the confining effect (support and friction force) provided by recess sidewall keeps the connection in good integrity. It also prevents early deformation and early development of transverse cracks along the connection interface, which further avoids the damage concentration at connection joint, transfers the plastic hinge region.</p>