钢混组合梁桥面连续结构抗弯性能研究

智海旭; 彭焱森; 杨刚; 贾骁; 卫星

doi:10.3724/j.gyjzG25061102

钢混组合梁桥面连续结构抗弯性能研究

doi: 10.3724/j.gyjzG25061102

智海旭^1,2,
彭焱森^3,4,
杨刚^1,2,
贾骁^3,4,
卫星^1,2, ,

1. 西南交通大学土木工程学院, 成都 610000;
2. 西南交通大学, 桥梁智能与绿色建造国家重点实验室, 成都 610000;
3. 广东省公路建设有限公司, 广州 510000;
4. 广东湾区交通建设投资有限公司, 广州 511400

基金项目:

西藏自治区重点研发计划（XZ202501ZY0133）。

详细信息

作者简介:
智海旭，硕士研究生，主要从事桥梁工程研究，zhx_way_up@my.swjtu.edu.cn。

通讯作者:
卫星，博士，教授，主要从事桥梁工程研究，we_star@swjtu.edu.cn。

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出版历程
- 收稿日期: 2025-06-11
- 网络出版日期: 2026-11-07

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

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

摘要

摘要: 为探究钢混组合梁桥面连续结构的抗弯性能及其优化设计方法，通过局部足尺试件静力试验与精细化有限元模拟相结合的方法，系统研究了钢筋脱黏与锯缝设置的协同作用机制。结果表明：钢筋脱黏处理虽降低结构极限承载力（脱黏试件极限荷载94.95 kN，黏结试件111.34 kN），但显著降低结构受弯变形（跨中挠度降低26.5%），且可显著减少次生裂缝数量（较黏结试件平均减少53.8%）；设置锯缝可使钢筋脱黏模型的最大转角减少25.5%，且当钢筋脱黏比取0.22~0.30时抗弯刚度最优。可见，合理设置锯缝与钢筋脱黏长度可有效平衡结构承载能力与变形控制需求，为钢混组合梁桥面连续结构的设计与施工提供了可靠依据。
- 钢混组合梁 /
- 桥面连续结构 /
- 抗弯性能 /
- 模型试验 /
- 有限元
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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