Experimental study on precast segmental box girders with corru- gated steel webs

Abstract

<p>Precast segmental bridge with corrugated steel webs has good popularization value, for the ad- vantages of precast segmental construction and box girder with corrugated steel webs. In order to study the mechanical behavior of this structure,6 simply-supported scale model beams with cor- rugated steel webs were tested with the forming process, ratio of internal tendons to external tendons, shear-span ratio, number of joint, connection type of corrugated steel web,etc.,as the parameters. Stress variations in the concrete, web and tendon and deflection during loading are described, the crack generation and failure mode are also explained, the effects of parameters on the mechanical behavior of beams are analyzed. The study indicates that segmental beams have equal stiffness with monolithic beam in elastic stage, the joint affects the failure mode and causes decrease in the flexural bearing capacity, segmental beams with mixed post-tensioning or flange connector show better mechanical behavior than other segmental beams.</p>