装配式胶合竹-混凝土组合梁试验研究

李天宇; 郭玉荣; 单波; 肖岩

doi:10.13204/j.gyjzG19111001

装配式胶合竹-混凝土组合梁试验研究

doi: 10.13204/j.gyjzG19111001

李天宇¹,
郭玉荣¹,
单波^1,2, ,,
肖岩³

1. 湖南大学土木工程学院, 长沙 410082;
2. 绿色先进土木工程材料及应用技术湖南省重点实验室, 长沙 410082;
3. 浙江大学浙大-伊利诺大学联合学院, 浙江海宁 314400

基金项目:

国家自然科学基金项目（51678228）；国家重点研发计划资助（2017YFC0703502）。

详细信息

作者简介:
李天宇,男,1995年出生,硕士研究生。

通讯作者:
单波,男,1976年出生,工学博士,副教授,supershanb@hnu.edu.cn。

计量
- 文章访问数: 82
- HTML全文浏览量: 9
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2019-11-10

EXPERIMENTAL RESEARCH ON ASSEMBLED GLUBAM-CONCRETE COMPOSITE BEAMS

LI Tianyu¹,
GUO Yurong¹,
SHAN Bo^{1,2
, ,},
XIAO Yan³

1. College of Civil Engineering, Hunan University, Changsha 410082, China;
2. Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, Changsha 410082, China;
3. Zhejiang University-University of Illinois Institute, Zhejiang University, Haining 314400, China

摘要

摘要: 针对现有凹槽连接件与销连接件性能上的不足，提出一种螺杆外包活性粉末混凝土（RPC）的装配式复合连接件。推出试验结果表明：外包RPC层对复合连接件的抗剪性能有显著贡献，抗滑移刚度和抗剪承载力都随外包RPC厚度的增加而增大；影响连接件抗剪性能最重要的因素是连接件的外径，而不是螺杆直径；复合连接件同时具备高刚度和高延性，且适于装配施工。对采用复合连接件的两根装配式胶合竹-混凝土组合（BCC）梁开展了四点抗弯试验，结果表明：装配式BCC梁在受弯过程中表现为部分组合效应，靠近端部的复合连接件产生较为显著的剪切变形，使得组合梁在破坏前具有明显的征兆，复合连接件的竖向抗拔构造措施可靠；设置轻骨料混凝土叠合层，能在有效控制自重的前提下，显著提高BCC梁的抗弯刚度和承载力；采用欧洲标准5（EC 5）中的γ法对BCC梁的抗弯承载力进行了预测，结果显示该方法明显高估了试件的承载力，不能直接用于BCC梁抗弯承载力的预测。
- 组合梁 /
- 胶合竹 /
- 剪力连接件 /
- 活性粉末混凝土 /
- 弯曲性能
Abstract: In order to overcome the performance deficiencies of the traditional notched connection and dowel connection,a prefabricated composite connector with screw and reactive powder concrete (RPC) coating was proposed. The push-out test results showed that the slip stiffness and shear bearing capacity increased as increasing of the thickness of RPC cover. The main influence factor for the shear behavior of the connection was the outside diameter instead of the diameter of the screw. The proposed connection had the advantages of high stiffness,high ductility and easy assembly. The four-point bending test was carried out on 2 assembled glubam-concrete composite (BCC) beams with composite connectors.The results showed that the flexural behavior of the assembled BCC beams could be attributed to the partial composite action, corresponding that the connectors near the end of BCC beam exhibited relatively large shear deformation. The BCC beams also showed obvious signs before failure due to the excellent ductility of connection. Vertical anti-pull-out measurement of the composite connector was also reliable. Lightweight-concrete overlay could obviously improve the flexural stiffness and bearing capacity of BCC beams without significantly increasing self-weight of BCC beam. The γ-method, provided by Eurocode 5, was selected to evaluate the bearing capacity of the BCC beams, and the predicting results were significantly higher than the test data. Therefore, the γ-method is not suitable for BCC beams.
- composite beams /
- glubam /
- shear connectors /
- reactive powder concrete (RPC) /
- flexural behavior

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