| 混杂纤维混凝土螺栓剪力键试验 |
| |
| 引用本文： | 何余良,胡立普,曹鑫雨,杨赢,项贻强.混杂纤维混凝土螺栓剪力键试验[J].中国公路学报,2021,34(6):90-98. |
| |
| 作者姓名： | 何余良 胡立普 曹鑫雨 杨赢 项贻强 |
| |
| 作者单位： | 1. 绍兴文理学院 土木工程学院, 浙江 绍兴 312000;2. 浙江大学 建筑工程学院, 浙江 杭州 310058 |
| |
| 基金项目： | 浙江省建设科研项目（2020K127）；浙江省自然科学基金项目（LY18E080017，LQ19E0008） |
| |
| 摘 要： | 为研究混杂纤维混凝土螺栓剪力键的极限承载力、滑移特性及破坏模式，设计3组10个推出试件进行试验研究，分析纤维、螺栓直径、螺栓孔径比等对混杂纤维混凝土螺栓剪力键的承载力、螺栓拉力、破坏模式及荷载-滑移特性的影响。试验结果表明：增大螺栓直径，可以明显提高螺栓剪力键的承载力，其中Φ22直径螺栓较Φ16，Φ19的螺栓的承载力分别提高了1.83倍、1.39倍；孔径比越小，螺栓剪力键的承载力和初始刚度越大，极限滑移量明显增加；随着混凝土强度降低，螺栓剪力键极限承载力和初始刚度明显降低，滑移量则有所增加；掺入纤维后可以提高螺栓剪力键的承载力和初始刚度，对极限滑移量改善不明显；钢混界面黏结力提高后，剪力键的初始刚度有所增加，承载力和滑移量则明显减少。最后，在试验结果的基础上，通过拟合方法提出了钢-混杂纤维混凝土螺栓剪力键承载力计算公式和荷载-滑移曲线公式，为其设计提供参考。
|
| 关 键 词： | 桥梁工程 混杂纤维混凝土 螺栓剪力键 荷载-滑移曲线 承载力 |
| 收稿时间： | 2019-10-08 |
Experimental Study on Behavior of Bolt Connectors in Steel-hybrid Fiber Concrete |
| |
| HE Yu-liang,HU Li-pu,CAO Xin-yu,YANG Ying,XIANG Yi-qiang.Experimental Study on Behavior of Bolt Connectors in Steel-hybrid Fiber Concrete[J].China Journal of Highway and Transport,2021,34(6):90-98. |
| |
| Authors: | HE Yu-liang HU Li-pu CAO Xin-yu YANG Ying XIANG Yi-qiang |
| |
| Affiliation: | 1. College of Civil Engineering, Shaoxing University, Shaoxing 312000, Zhejiang, China;2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China |
| |
| Abstract: | To investigate the ultimate capacity, slip and failure mode of bolt connector in hybrid fiber-reinforced concrete(HFRC), ten push out test specimens were designed to consider the influence of parameters such as fiber, bolt diameter, and the ratio of bolt and aperture, on the properties of bolt connectors in HFRC. The test results show that the capacity of the connectors in HFRC increase with the bolt diameter. The bearing capacity of Φ22 mm diameter bolt connectors is 1.83 and 1.39 times higher than that of bolt connectors with diameters of Φ16 mm and Φ19 mm, respectively. When the ratio of bolt and aperture decreases, the initial stiffness, capacity, and slippage of the connectors increase. With the reduction in concrete strength, the initial stiffness and capacity of the connectors decrease, and the slippage increases. The fibers could improve the initial stiffness and capacity of the connector, and the effect of slip might neglect. After the adhesion stress of the interface between the steel beam and the concrete slab was enhanced, the initial stiffness of the bolt connector increased and the capacity and slippage reduced. Finally, the calculation formulas of the capacity and load-slip curve were proposed based on the test data fitted. |
| |
| Keywords: | bridge engineering HFRC bolt connector load-slip curve capacity |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国公路学报》浏览原始摘要信息 |
|
点击此处可从《中国公路学报》下载全文 |
|
