| 两种FRP-混凝土组合梁对比试验及界面抗剪 |
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| 引用本文： | 李嵩林,邹星星,王景全.两种FRP-混凝土组合梁对比试验及界面抗剪[J].武汉水运工程学院学报,2013(5):984-988. |
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| 作者姓名： | 李嵩林 邹星星 王景全 |
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| 作者单位： | [1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]招商局重庆交通科研设计院有限公司,重庆400067 [3]东南大学国家预应力工程技术研究中心,南京210096 |
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| 基金项目： | 国家自然科学基金项目资助（批准号：51008068） |
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| 摘 要： | 为研究FRP型材-混凝土组合梁界面连接方式及界面抗剪计算方法,对FRP小型材和钢螺栓2种剪力键形式进行了对比研究.对1根纯FRP梁、2根剪力键为FRP小工字梁、3根剪力键为钢螺栓的组合梁进行了四点弯曲试验.对比不同梁的承载力、破坏模式、刚度等.研究了不同连接形式及连接程度对组合梁性能的影响.推导了界面纵向抗剪承载力计算公式.试验和理论研究结果表明：钢螺栓剪力键传递界面剪力的效率和极限承载力较FRP小工字梁剪力键高.
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| 关 键 词： | FRP-混凝土组合梁 FRP工字梁剪力键 钢螺栓 界面抗剪性能 抗剪强度 |
Comparative Experimental and Theoretical Study on the Interfacial Shear Behavior of Two Types FRP-concrete Composite Beams |
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| Authors: | LI Songlin ZOU Xingxing WANG Jingquan |
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| Institution: | 1.Key Laboratory of C＆ PC Structures of Ministry of Education, Southeast University, Nanjing 210096, China ; China Merchants Chongqing Transport Research ＆ Design Institute Co.Ltd., Chongqing 400067, China; 2.Key Laboratory of C＆ PC Structures of Ministry of Education, Southeast University, Nanjing 210096, China ; National Prestress Engineering Research Center, Southeast University, Nanjing 210096, China;) |
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| Abstract: | Shear Connector is the important components of FPR-concrete composite beam.In order to study the interfacial shear behavior of FRP-concrete composite beams with two frequently-used types of shear connectors-FRP profiles and steel bolts,6 composite beam specimens under four-point loading were tested,which are one FRP beam,two beams with FRP I-beams shear connectors,and the rest 3 beams with steel bolts connectors.Through comparing bearing capacity,failure modes,stiffness of different beams,the effects of different connectors and degrees of connecting on composite beams were investigated.It is concluded that the efficiency of beam with steel bolt to transfer interface shear and the bearing capacity are better than that of beam with FRP I-beam shear connector.Last,analytical formulas are derived to calculate the longitudinal shear capacity of FRP-concrete composite beams. |
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| Keywords: | FRP-concrete composite beam FRP I beam shear connector steel bolts connector interfacial shear behavior shear strength |
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