I形截面内嵌型钢-UHPC组合梁抗弯性能研究

doi:10.12141/j.issn.1000-565X.250547

华南理工大学学报(自然科学版)

I形截面内嵌型钢-UHPC组合梁抗弯性能研究

马玉全^1,2 吴旷怀¹ 吴红林³ 孙向东⁴ 蒋峰³ 范学明⁵ 许佳波²

1．广州大学土木与交通工程学院，广东广州 510006；

2．广州鼎兴土木科技有限公司，广东广州 510620

3. 哈尔滨工业大学交通科学与工程学院，黑龙江哈尔滨 150090；

4. 广东省交通规划设计研究院集团股份有限公司，广东广州 510440；

5.华南理工大学土木与交通学院，广东广州 510640

发布日期:2026-03-06

Research on the Flexural Performance of Embedded Steel-UHPC I-Shaped Composite Beams

Ma Yuquan ^1,2 Wu Kuanghuai¹ Wu Honglin³ Sun Xiangdong⁴ Jiang Feng³ Fan Xveming⁵ Xu Jiabo²

1.School of Civil and Transportation Engineering, Guangzhou University 510006, Guangdong, China；

2. Guangzhou Dingxing Civil Engineering Technology Co., Ltd., 510620, Guangdong, China;

3. School of Transportation Science and Engineering, Harbin Institute of Technology, 150090, Heilongjiang, China；

4.Guangdong Communication Planning & Design Institute Group Co., Ltd., 510507, Guangdong, China；

5.School of Civil Engineering and Transportation, South China University of Technology, 510640, Guangdong, China

Published:2026-03-06

摘要/Abstract

摘要： 为提升钢梁的耐久性与超高性能混凝土（UHPC）梁的承载性能，本文提出一种内嵌型钢-UHPC I形（SRUHPC-I）组合梁结构，通过在工字钢外表面采用剪力钉包覆配筋UHPC薄层，从而协同增强结构承载能力与耐久性。研究通过4根足尺寸SRUHPC-I组合梁的弯曲性能试验，分析了试验梁的弯曲破坏模式，基于试验结果评估了其抗弯性能并进行了有限元分析。结果表明：试验梁均呈现典型的弯曲破坏特征，依次经历弹性阶段、弥散开裂阶段、屈服阶段与破坏阶段，最终破坏形态为受拉区钢筋与钢板屈服、受压区UHPC压溃，结构挠度急剧增大，纯弯段下缘钢板与钢筋屈服，随后上翼缘UHPC压溃，充分发挥了UHPC的高强特性，并形成多条竖向主裂缝；在试件屈服之前，截面应变分布符合平截面假定，有限元分析结果与试验结果吻合良好。基于材料弹塑性理论与截面非线性叠加分析方法，建立了SRUHPC-I组合梁的抗弯分析方法，该方法将UHPC与钢板作为独立构件分别分析，最终计算值与试验值比值的平均值为0.96，吻合良好，验证了该方法的有效性，可用于SRUHPC-I组合梁抗弯性能的预测。

关键词: 超高性能混凝土, 内嵌型钢-UHPC工字形组合梁, 抗弯性能, 足尺寸抗弯试验, 理论分析

Abstract:

In order to improve the durability of steel beams and the bearing capacity of ultra-high performance concrete (UHPC) beams, an embedded steel-UHPC I-shaped (SRUHPC-I) composite beam structure is proposed in this paper. By using shear studs to cover the reinforced UHPC thin layer on the outer surface of I-steel, the bearing capacity and durability of the structure are synergistically enhanced. Through the bending performance test of four full-size SRUHPC-I composite beams, the bending failure mode of the test beams was analyzed. Based on the test results, the bending performance was evaluated and the finite element analysis was carried out. The results show that the test beams all show typical bending failure characteristics, which experience the elastic stage, the dispersion cracking stage, the yield stage and the failure stage in turn. The final failure mode is the yield of steel bars and steel plates in the tension zone and the collapse of UHPC in the compression zone. The structural deflection increases sharply. The steel plates and steel bars at the lower edge of the pure bending section yield, and then the UHPC at the upper flange collapses, giving full play to the high strength characteristics of UHPC and forming multiple vertical main cracks. Before the specimen yields, the section strain distribution conforms to the plane section assumption, and the finite element analysis results are in good agreement with the experimental results. Based on the elastic-plastic theory of materials and the nonlinear superposition analysis method of cross section, the bending analysis method of SRUHPC-I composite beam is established. In this method, UHPC and steel plate are analyzed separately as independent components. The average value of the ratio of the final calculated value to the experimental value is 0.96, which is in good agreement. The validity of the method is verified and can be used to predict the bending resistance of SRUHPC-I composite beams.

Key words: ultra-high performance concrete (UHPC), embedded steel-UHPC I-shaped composite beam, flexural performance, full scale flexural test, theoretical analysis

马玉全, 吴旷怀, 吴红林, 等. I形截面内嵌型钢-UHPC组合梁抗弯性能研究[J]. 华南理工大学学报(自然科学版), doi: 10.12141/j.issn.1000-565X.250547.

Ma Yuquan, Wu Kuanghuai, Wu Honglin, et al. Research on the Flexural Performance of Embedded Steel-UHPC I-Shaped Composite Beams[J]. Journal of South China University of Technology(Natural Science Edition), doi: 10.12141/j.issn.1000-565X.250547.

[1]	范学明, 叶小杭, 周晓鹏, 印世麟. UHPC梁式构件抗弯性价比评价体系研究及应用[J]. 华南理工大学学报(自然科学版), 2026, 54(2): 112-122.
[2]	朱江赵国藩李士恩李丽娟郭永昌 . 钢纤维增强钢丝网混凝土T形梁的抗弯试验研究[J]. 华南理工大学学报（自然科学版）, 2008, 36(1): 117-121,127.
[3]	郭永昌黄培彦李丽娟朱江刘锋. CFS/GFS层问混杂加固纤维混凝土梁抗弯试验研究[J]. 华南理工大学学报(自然科学版), 2006, 34(4): 13-18.

I形截面内嵌型钢-UHPC组合梁抗弯性能研究

Research on the Flexural Performance of Embedded Steel-UHPC I-Shaped Composite Beams

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