(清华大学土木工程系，结构工程与振动教育部重点实验室，北京 100084)

［摘要］在钢板-混凝土组合梁及钢板-混凝土组合抗弯加固梁中，由于栓钉与普通钢-混凝土组合梁中受力情况不同，其抗剪承载力按照现行规范的方法计算偏于不安全。为了研究栓钉连接件在钢板-混凝土组合梁及组合抗弯加固中的性能，进行了8根钢板-混凝土组合梁及10根钢板-混凝土组合抗弯加固钢筋混凝土梁的试验，通过量测钢板沿轴向的应变间接得到栓钉在梁中的性能。通过分析栓钉在钢板-混凝土组合梁及组合抗弯加固中的受力情况，给出了栓钉抗剪承载力的计算方法，采用该方法得到的结果与试验结果吻合较好。

［关键词］钢板-混凝土组合梁;组合抗弯加固;栓钉;抗剪承载力

Shear resistance of stud shear connectors in steel plate-concrete composite beams and RC beams flexurally strengthened using steel plate-concrete composite technique

Nie Jianguo, Zhao Jie(Department of Civil Engineering, Key Laboratory of Structural Engineering andVibration of China Education Ministry, Tsinghua University, Beijing 100084, China)

Abstract:The states of stress and ultimate shear resistance of stud shear connectors in steel plate-concrete composite (SPCC) beams and RC beams flexurally strengthened using SPCC technique were different from the studs in traditional steel-concrete composite beams in hogging moment region, so the design rules in current standards can not be used in SPCC beams. Eight large-scale SPCC beams and ten RC beams flexurally strengthened using SPCC technique were tested. The axial strains of steel plate were measured in order to obtain the real behavior of studs in SPCC beams. The ultimate shear strength of studs is suggested according to test results. A design model is proposed based on the analysis of the state of stress of steel plate in SPCC beams. And the design method is verified by the test results.

Keywords:steel plate-concrete composite beams; strengthened using steel plate-concrete composite technique; stud shear connectors; shear resistance

*国家自然科学基金资助项目(50578084)，铁道部科技研究开发计划资助项目(2006G029)。

作者简介：聂建国（1958-），男（汉），湖南人，教授，Email: niejig@tsinghua.edu.cn。

参考文献

［1］European Committee for Standardization. Eurocode 4. Design of composite steel and concrete structures, Part 1.1: General rules and rules for buildings［S］. Brussels, Belgium, 1994.

［2］聂建国，刘明，叶列平. 钢-混凝土组合结构［M］. 北京： 中国建筑工业出版社，2005.

［3］JOHNSON R PAUL, GREENWOOD R D, DALEN K VAN. Stud shear-connectors in hogging moment regions of composite beams［J］. The Structural Engineer, 1969, 47(9):345-350.

［4］ODUYEMI T O S， WRIGHT H D. An experimental investigation into the behaviour of double-skin sandwich beams［J］. Journal of Constructional Steel Research, 1989, 14(3): 197-220.

［5］WRIGHT H D， ODUYEMI T O S. Partial interaction analysis of double skin composite beams［J］. Journal of Constructional Steel Research, 1991,19(4): 253-283.

［6］WRIGHT H D,ODUYEMI T O S， EVANS H R. The design of double skin composite elements［J］. Journal of Constructional Steel Research, 1991, 19(2): 111-132.

［7］ROBERTS T M, EDWARDS D N，NARAYANAN R. Testing and analysis of steel-concrete-steel sandwich beams［J］. Journal of Constructional Steel Research, 1996, 38(3): 257-279.

［8］CP117. Composite Construction in Structural Steel and Concrete［S］. 1965.

［9］叶梅新, 吏林山. 混凝土受拉状态下钢-混凝土组合结构中栓钉的承载力的研究［J］. 长沙铁道学院学报, 2003, 21(1): 8-12.

［10］British Standard Institution. BS 5400-1. Steel, concrete and composite bridges, Part 1: General statement［S］. London, March 12,2003.

［11］British Standard Institution. BS 5950-3. Structural use of steelwork in building, Part 3: Design in composite construction［S］. London, 1990.

［12］GB50017