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EXPERIMENT ON ULTIMATE BEARING CAPACITY AND SHEAR RIGIDITY OF STUD CONNECTORS
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摘要: 对焊接圆柱头栓钉连接件,考虑栓钉直径、混凝土强度及钢纤维配置三个因素,进行三因素三水平正交推出试验。试验数据的极差和方差分析表明,在混凝土中配置钢纤维不影响栓钉的抗剪承载力和剪切滑移刚度,但栓钉的剪切刚度随混凝土强度的提高而增大,剪切刚度与滑移量呈双曲函数关系;并给出栓钉极限承载力及剪切刚度的计算公式。重复加载试验表明,即使在剪力很小时,对栓钉卸载其滑移变形仍不能恢复。Abstract: Based on 3 factors of stud diameter and concrete intensity and steel fibre, orthogonal push -off tests of weldedstud shear connectorswere conducted. The analysis of range and variance shows that the steel fiber inside concrete has noeffect on ultimate carrying capacity and shear rigidity of stud. Shear rigidity of stud increases as concrete intensity. Therelation between shear rigidity and slip is hyperbolic function. Formulae calculating ultimate carrying capacity and shearrigidity of stud are given. The repeat load tests show that the slip is no comeback with unloading even if low -shear.
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Key words:
- stud connectors /
- ultimate carrying capacity /
- shear rigidity /
- orthogonal test
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.Ollgaard J G, Roger G Slutter, John W Fisher. Shear Strength of StudConnectors in Lightweight and Norma-l Weight Concrete. AISCEngineering Journal, 1971, 8(2): 55-64 .Li A, Krister C. Push -Out Tests on Studs in High Strength and NormalStrength Concrete. J. Constr. Steel Res, 1996,36(1): 15-29 .宗周红, 车惠民. 剪力连接件静载和疲劳试验研究. 福州大学学报, 1999, 27(6):61-66 .曹建安, 叶新梅. 结合梁栓钉的极限承载力的试验研究. 长沙铁道学院学报, 1999,17(1): 16-20 .Dennis Lam, ASCEM, Ehab E-l Lobody. Behavior of Headed Stud ShearConnectors in Composite Beam. J.Struct.Eng, 2005, 131(1): 96-107 .阎.石, 刘学东. 钢-混凝土组合梁连接件的综合评述. 沈阳建筑工程学院学报, 1996,12(2): 258-265 .聂建国. 钢-混凝土组合梁结构. 北京: 科学出版社, 2005: 1-314 .白国良, 刘.明. 荷载与结构设计方法. 北京: 高等教育出版社,2003: 140-145 -
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