预应力胶合木-混凝土组合梁受弯性能的试验研究

陈溪; 许清风; 张富文; 冷予冰; 王明谦; 陈玲珠

doi:10.3724/j.gyjzG24090204

预应力胶合木-混凝土组合梁受弯性能的试验研究

doi: 10.3724/j.gyjzG24090204

陈溪^1,2,
许清风^1, ,,
张富文^1,2,
冷予冰¹,
王明谦¹,
陈玲珠¹

1. 上海市建筑科学研究院有限公司,上海市工程结构安全重点实验室, 上海 200032;
2. 上海建科预应力技术工程有限公司, 上海 200032

基金项目:

上海市自然科学基金(23ZR1454400)。

上海市优秀技术带头人项目(22XD1432100)

详细信息

作者简介:
陈溪,博士,正高级工程师,主要从事木竹结构方面研究。

通讯作者:
许清风,博士,教授级高级工程师,主要从事装配式结构和工程结构抗火领域的研究,xuqingfeng73@163.com。

计量
- 文章访问数: 14
- HTML全文浏览量: 2
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2024-09-02
- 网络出版日期: 2024-11-06

Experimental Research on Bending Performance of Prestressed Glulam-Concrete Composite Beams

1. Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences Co., Ltd., Shanghai 200032, China;
2. Shanghai Jianke Prestressed Engineering Co., Ltd., Shanghai 200032, China

摘要

摘要: 进行了4组12个预应力胶合木-混凝土组合梁试件的受弯试验,试验参数为抗剪连接型式,包括凹槽连接、凹槽加螺钉连接、多种组合连接。结果表明:预应力胶合木-混凝土组合梁试件的主要破坏模式为木材的受弯破坏;对于同样采用凹槽加螺钉连接的组合梁试件,施加预应力后的平均受弯承载力提高了20.3%、破坏刚度提高了10.1%。组合梁试件破坏时,剪力连接处发生明显的滑移;采用凹槽加螺钉连接的组合梁试件在破坏时整体性和受弯承载力均优于其余两组组合梁试件,连接效果较好。
- 预应力 /
- 胶合木-混凝土组合梁 /
- 剪力连接 /
- 受弯试验
Abstract: Four sets of 12 bending tests of prestressed glued laminated timber (glulam)-concrete composite beams with different shear connections were tested. The test parameter is the shear connection form, including notch connections, notch plus screw connections, and the combination of multi connections. The results of the bending test showed that the main failure mode of the composite beams was the bending failure of the timber. For beams with the same notch plus screw connection, applying prestress increased the average bending bearing capacity by 20.3%, the average collapse bending stiffness by 10.1%. At failure, obvious slip occurred at the shear connection. The beam with notch plus screw connection showed better integrity and flexural capacity when it failed compared to the other two sets of composite beams, which meant that the notch plus screw connection presented a better connection effect.
- prestress /
- glulam-concrete composite beams /
- shear connection /
- bending test

HTML全文

参考文献(14)

[1]	YEOH D, FRAGIACOMO M, DE FRANCESCHI M, et al. State of the art on timber-concrete composite structures: literature review[J]. Journal of Structural Engineering, 2011, 137(10): 1085-1095.
[2]	江雨辰, 胡夏闽. 木-混凝土组合梁研究综述[J]. 建筑结构学报, 2019, 40(10): 149-157 ,167.
[3]	胡朝斌, 杜浩, 孙志翔, 等. 有木隔板的木-混凝土组合梁斜交螺钉连接件抗剪承载力计算方法研究[J]. 工业建筑, 2020, 50(9): 89-93.
[4]	杜浩, 胡夏闽, 王汉成, 等. 胶合木-混凝土组合梁斜向螺钉连接件受剪性能研究[J]. 建筑结构学报, 2020, 41(7): 191-200.
[5]	CLOUSTON P, BATHON L A, SCHREYER A. Shear and bending performance of a novel wood-concrete composite system[J]. Journal of Structural Engineering, 2005, 131(9): 1404-1412.
[6]	PERSAUD R, SYMONS D. Design and testing of a composite timber and concrete floor system [J]. Structural Engineer, 2005, 84(4): 22-36.
[7]	袁帅, 贺国京, 李礼, 等. 木-混凝土组合梁桥受力性能试验研究[J]. 工业建筑, 2018, 48(5): 112-116.
[8]	胡夏闽, 李巧, 彭虹毅, 等. 木-混凝土组合梁静力试验研究[J]. 建筑结构学报, 2013, 34(增刊1): 371-376.
[9]	DEAM B, FRAGIACOMO M, GROSS S. Experimental behavior of prestressed LVL-concrete composite beams[J]. Journal of Structural Engineering, 2008, 134(5):801-809.
[10]	SHI B K, ZHU W X, YANG H F, et al. Experimental and theoretical investigation of prefabricated timber-concrete composite beams with and without prestress[J]. Engineering Structures, 2020, 204,109901.
[11]	郑玉槟, 刘问, 申士杰, 等. 预应力FRP增强胶合木的预应力损失研究[J]. 世界地震工程, 2019, 35 (3): 99-107.
[12]	CEN. Timber structures-joints made with mechanical fasteners-general principles for the determination of strength and deformation characteristics: EN 26891∶1991 [S]. Brussels: CEN, 1991.
[13]	陈溪. 预应力胶合木-混凝土组合梁的受力机理和长期性能研究[R]. 上海: 上海市建筑科学研究院有限公司, 2024.
[14]	中华人民共和国住房和城乡建设部. 木结构试验方法标准: GB/T 50329—2012 [S]. 北京: 中国建筑工业出版社, 2012.