Experimental study on the feasibility of a centrifugal precast pipe column with a socket connection

<p>As accelerated bridge construction for bridges continues to evolve in China, the application of this technology has expanded from superstructures to substructures. To further promote its application, this paper aims to propose the socketed centrifugal precast pipe column as a reference replacement solution. Two specimens were designed in this paper based on preliminary experimental research: one is a cast-in-place (CIP) solid cylindrical column specimen, and the other is a socketed centrifugal precast pipe column specimen. The performance differences between the two types of columns were studied through quasi-static tests, and the feasibility of the socketed centrifugal precast pipe column specimen was explored. The experimental results show that the test phenomena of the precast specimen and the CIP specimen are generally similar. Insufficient bonding between the filling concrete and the pipe column leads to phenomena such as hoop reinforcement fracture and compression failure in the precast specimen. There is a slight difference in the seismic performance between the precast specimen and the CIP specimen, with the precast specimen having higher bearing capacity and the CIP specimen having higher displacement ductility. Overall, the socketed centrifugal precast pipe column can meet the design requirements equivalent to CIP solid columns.</p>