| 预制UHPC组合梁槽口式连接界面抗剪性能研究 |
| |
| 引用本文： | 姜海波,董孝童,邵腾飞,方壮城. 预制UHPC组合梁槽口式连接界面抗剪性能研究[J]. 中国公路学报, 2021, 34(2): 276-288. DOI: 10.19721/j.cnki.1001-7372.2021.02.016 |
| |
| 作者姓名： | 姜海波 董孝童 邵腾飞 方壮城 |
| |
| 作者单位： | 1. 广东工业大学土木与交通工程学院, 广东广州 510006;2. 甘肃省铁路投资建设集团有限公司, 甘肃兰州 730000;3. 东莞路桥投资建设有限公司, 广东东莞 523000 |
| |
| 基金项目： | 国家自然科学基金项目(51778150);广东省自然科学基金项目(2016A030313699);广州市科技计划项目(201804010422)。 |
| |
| 摘 要： | 相比现浇混凝土桥面板,全预制混凝土桥面板有诸多优势,能够提高桥梁工程质量、加快桥梁施工速度和降低成本.预制超高性能混凝土(Ultra-high Performance Concrete,UHPC)梁和预制UHPC桥面板通过槽口连接形成组合梁是一种新的结构形式,这种槽口式连接的界面抗剪性能会影响全梁整体承载力.通过16个...
|
| 关 键 词： | 桥梁工程 界面抗剪性能 推出试验 UHPC组合梁 槽口式连接 |
| 收稿时间： | 2019-10-28 |
Study on the Interface Shear Behavior of Precast UHPC Composite Beam with Shear Pocket |
| |
| JIANG Hai-bo,DONG Xiao-tong,SHAO Teng-fei,FANG Zhuang-cheng. Study on the Interface Shear Behavior of Precast UHPC Composite Beam with Shear Pocket[J]. China Journal of Highway and Transport, 2021, 34(2): 276-288. DOI: 10.19721/j.cnki.1001-7372.2021.02.016 |
| |
| Authors: | JIANG Hai-bo DONG Xiao-tong SHAO Teng-fei FANG Zhuang-cheng |
| |
| Affiliation: | 1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China;2. Gansu Province Railway Investment Construction Group Co. Ltd., Lanzhou 730000, Gansu, China;3. Dongguan Road and Bridge Investment Construction Co. Ltd., Dongguan 523000, Guangdong, China |
| |
| Abstract: | Compared with cast-in-place concrete bridge decks,full-depth precast concrete bridge decks have numerous advantages,which can improve the quality of precast concrete slabs,accelerate bridge construction,and reduce costs.In this study,the interface shear behavior of a novel shear pocket was evaluated,which connected a precast ultra-high performance concrete(UHPC)beam and a precast UHPC bridge deck.The interface shear behavior of shear pocket effects the overall load-bearing capacity of the composite beam.Sixteen push-out specimens with different reinforcement ratios,concrete types of precast beam,concrete types of precast deck,and grouted concrete types were tested to estimate the effect on the interface shear behavior.The propagation of cracks were observed during the test,and the vertical slip,horizontal slip,reinforcement strain,ultimate load,and residual load were recorded.The test results showed that the reinforcement ratio plays a significant role in the ultimate Vuand residual Vrloads.The ultimate load with a reinforcement ratio of 3.7%is 1.06times and 1.20times the reinforcement ratio of 2.8%and 2.0%,respectively.Second,Vuand Vrare dominated together by the grouted concrete types and precast beam concrete types.Third,the precast bridge deck concrete type has a slight effect on the shear behavior.Simultaneously,it is deduced that the dowel action of the reinforcement is mainly affected by the diameter and concrete strength grade.Compared with AASHTO LRFD 2015and ACI 318,it is inferred that the two codes are conservative in estimating the shear capacity of UHPC composite beams by shear pocket connection.Finally,a formula for predicting the precast UHPC composite beam is proposed in this paper,which is in good agreement with experimental value. |
| |
| Keywords: | bridge engineering interface shear behavior push-out test UHPC composite beam shear pocket connection |
| 本文献已被 CNKI 维普 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》下载免费的PDF全文 |
|
