Axial–Shear–Flexure Interaction Behavior of Joints in Precast Concrete Segmental Bridge Columns
Publication: Journal of Bridge Engineering
Volume 23, Issue 10
Abstract
Precast concrete segmental bridge columns (PCSBCs) have developed rapidly in recent years. To study the effect of shear on the carrying capacity of the joints in PCSBCs, four conventionally reinforced concrete segmental bridge columns (CRCSBCs) and three totally prestressed concrete segmental bridge columns (TPCSBCs) with different aspect ratios were subjected to monotonic loading for failure. During the test, initiation and development of failure cracks, failure processes and modes, relative slide along the joint plane, strains of stirrups, longitudinal steels, and prestressing tendons were recorded. The results showed that the failure crack always concentrated in the joint plane in PCSBCs, and stirrups near the joint contributed little to resist the shear force at the joint section. Subsequently, the peak carrying capacity of the joint was attained with uncracked concrete subjected to combined normal and shear stresses that resulted in the interaction of axial load, shear, and bending moment at the joint plane in PCSBCs. Based on the simplified failure modes proposed in this paper, both a general and a simplified method were proposed to calculate the axial–shear–flexure interaction resistance of the joints in PCSBCs.
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Acknowledgments
This experimental study was used for writing the “Technical Specification for Precast Segmental Concrete Bridges” (2012–1-150) (MOHURD 2012). The authors thank the reviewers of this paper for their comments and suggestions.
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Information
Published In
Journal of Bridge Engineering
Volume 23 • Issue 10 • October 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jun 16, 2017
Accepted: Mar 20, 2018
Published online: Jul 19, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 19, 2018
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