Research on the Flexural Performance of Continuous Steel-Concrete Composite Beam Bridge Decks

ZHI Haixu; PENG Yansen; YANG Gang; JIA Xiao; WEI Xing

doi:10.3724/j.gyjzG25061102

Volume 56 Issue 9

Sep. 2026

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ZHI Haixu, PENG Yansen, YANG Gang, JIA Xiao, WEI Xing. Research on the Flexural Performance of Continuous Steel-Concrete Composite Beam Bridge Decks[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(9): 184-193. doi: 10.3724/j.gyjzG25061102

Citation:

ZHI Haixu, PENG Yansen, YANG Gang, JIA Xiao, WEI Xing. Research on the Flexural Performance of Continuous Steel-Concrete Composite Beam Bridge Decks[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(9): 184-193. doi: 10.3724/j.gyjzG25061102

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Research on the Flexural Performance of Continuous Steel-Concrete Composite Beam Bridge Decks

doi: 10.3724/j.gyjzG25061102

ZHI Haixu^1,2,
PENG Yansen^3,4,
YANG Gang^1,2,
JIA Xiao^3,4,
WEI Xing^{1,2
,
,}

1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610000, China;
2. National Key Laboratory of Bridge Intelligent and Green Construction, Southwest Jiaotong University, Chengdu 610000, China;
3. Guangdong Highway Construction Co., Ltd., Guangzhou 510000, China;
4. Guangdong Bay Area Transportation Construction Investment Co., Ltd., Guangzhou 511400, China

Received Date: 2025-06-11
Available Online: 2026-11-07

Abstract

Abstract

In order to investigate the flexural performance and optimal design of continuous steel-concrete composite beam bridge deck structures， a comprehensive methodology combining partial full-scale static tests and refined finite element simulations was used to explore the synergistic effects of rebar debonding and saw-cut installation. The results showed that rebar debonding reduced the ultimate bearing capacity of the structure （ultimate load： 94.95 kN for debonded specimens vs. 111.34 kN for bonded specimens）， but also significantly reduced the bending deformation， with a 26.5% reduction in mid-span deflection. Additionally， debonding treatment effectively reduced secondary crack density by 53.8% compared to bonded specimens. Finite element parametric analysis revealed that saw-cut installation reduced the maximum rotation angle by 25.5% in debonded models， with optimal flexural performance observed at a debonding ratio of 0.22-0.30. It is concluded that rational saw-cut design and debonding length optimization can balance structural bearing capacity and deformation control， providing a theoretical foundation for the engineering application of continuous steel-concrete composite beam bridge decks.
- steel-concrete composite beam,
- continuous bridge deck structure,
- flexural performance,
- model testing,
- finite element

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References(24)

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