Research on the effects of curvature and shear keys on torsional stiffness and interfacial stress of segmented U-shaped curved bridge.

Shuai Zhang, Chuang Wang, Hongchun Qu, Wenjie Xu, Lin Xiao, Qingsong Fan, Chuanbiao Wang, Yanqun Han

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Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

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5 · Who and what money

Authors and funding

8 authors.

Shuai ZhangSchool of Civil Engineering, Central South University, Changsha, 410075, China.

Chuang WangChina Communications Construction Company, Second Harbor Engineering Co., Ltd, Wuhan, 430040, China.

Hongchun QuChina Communications Construction Company, Second Harbor Engineering Co., Ltd, Wuhan, 430040, China.

Wenjie XuChina Communications Construction Company, Second Harbor Engineering Co., Ltd, Wuhan, 430040, China.

Lin XiaoChina Communications Construction Company, Second Harbor Engineering Co., Ltd, Wuhan, 430040, China.

Qingsong FanThe Second Xiangya Hospital, Central South University, Changsha, 410011, China. 360249309@qq.com.

Chuanbiao WangChongqing Transportation Planning and Technology Development Center, Chongqing, 400074, China.

Yanqun HanSchool of Civil Engineering, Central South University, Changsha, 410075, China.

Funding

Technology Research and Development Program of China Harbour Engineering Co., Ltd. METRO1 - CS - E - 230812

6 · The paper itself

Abstract

This paper investigates the segmental U-shaped curved bridge of Bogotá Metro Line 1 project in Colombia. The effects of curvature radius (R) of the bridge and shear keys (number, arrangement, and size) at inter-segment bonding joints on the bridge's torsional stiffness and interfacial stress are analyzed. The results demonstrate a nonlinear relationship between bridge curvature and torsional stiffness. As the curvature radius increases, torsional stiffness enhances while the growth rate declines gradually. Increasing the number of shear keys in the web and floor regions of U-shaped bridge segments, along with extending their width, effectively enhances the bridge's torsional stiffness and global deformation resistance while ameliorating the interfacial stress state between segments. These findings offer both theoretical and practical guidance for the design of segmental U-shaped curved bridges and shear key systems.

Indexed as

Curvature radiusInterfacial stressSegmental u-shaped curved bridgesShear keysTorsional stiffness

Identifiers

PMID41068226

DOI10.1038/s41598-025-19337-4

PMCPMC12511427

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.