Experimental study on oblique-shear performance of splicing joint for precast ultrahigh-performance concrete segmental bridges

Hui Zheng; Zhao Gong; Chao Cui; Zihao Chen; Xiaowan Ma; Hongyi Li; You Li

Case Studies in Construction Materials (Dec 2023)

Experimental study on oblique-shear performance of splicing joint for precast ultrahigh-performance concrete segmental bridges

Hui Zheng,
Zhao Gong,
Chao Cui,
Zihao Chen,
Xiaowan Ma,
Hongyi Li,
You Li

Affiliations

Hui Zheng: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China; Hunan Provincial Key Laboratory for Intelligent Control of Safety and Risk in Existing Engineering Structures, Hunan University of Technology, Zhuzhou 412007, Hunan, China; Industry Key Laboratory of Traffic Infrastructure Security Risk Management (CSUST), Changsha, Hunan 410114, China
Zhao Gong: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China
Chao Cui: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China
Zihao Chen: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China
Xiaowan Ma: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China
Hongyi Li: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China
You Li: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China; Hunan Provincial Key Laboratory for Intelligent Control of Safety and Risk in Existing Engineering Structures, Hunan University of Technology, Zhuzhou 412007, Hunan, China; Corresponding author at: School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China.

Journal volume & issue: Vol. 19
p. e02336

Abstract

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This paper aims to study the effect of the normal stress on the shear performance of splicing joints for precast ultrahigh-performance concrete (UHPC) segmental bridges (PUSBs), an oblique-shear joint is designed to decompose the vertical force into a normal force and a shear force for the joint. The effect of the number, height and inclination angle of the keys on the bearing capacity of the joint is studied by 19 oblique-shear joints. Then, the bearing capacity and failure modes are analyzed significantly. The results show that the failure modes of the joints are shear failure, compression-shear failure and splitting failure, all showing primarily brittle failure. Moreover, the proportion of shear stress in the specimens increases with the increase of the inclination angle of the joint, and the shear capacity of the specimens decreases. Additionally, the shear capacity of the specimens increases with the increase of the height of the keys. After that, we derive a new formula for calculating the shear capacity utilizing Mohr’s stress circle theory and Mohr-Coulomb failure criterion, i.e., the interfacial frictional coefficient is 0.94 and the shear capacity of keys is 0.06. One may find the present formula shows a high guarantee by comparing with those from references. The formula established in this paper may be used to calculate the shear capacity of splicing joint of precast ultrahigh-performance concrete segmental bridges.

Published in Case Studies in Construction Materials

ISSN: 2214-5095 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/case-studies-in-construction-materials

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