| 高温下钢筋桁架楼承板中栓钉抗剪性能研究 |
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| 引用本文： | 陈玲珠,李国强,蒋首超,王卫永,RANZI Gianluca.高温下钢筋桁架楼承板中栓钉抗剪性能研究[J].建筑结构学报,2015,36(5):116-123. |
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| 作者姓名： | 陈玲珠 李国强 蒋首超 王卫永 RANZI Gianluca |
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| 作者单位： | 1.同济大学 土木工程学院，上海200092； 2.School of Civil Engineering,The University of Sydney， Sydney NSW2006; 3.同济大学 土木工程防灾国家重点实验室，上海200092; 4.重庆大学 土木工程学院, 重庆400045 |
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| 基金项目： | 同济大学土木工程防灾国家重点实验室开放课题(SLDRCE-MB-05)。 |
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| 摘 要： | 对15个试件进行常温和高温下推出试验，研究钢筋桁架楼承板中栓钉的抗剪性能，得到混凝土楼板和栓钉不同位置处的温度分布以及栓钉受剪承载力随温度的退化规律。试验结果表明,钢筋桁架楼承板中栓钉在常温和高温下的破坏均为栓钉剪断破坏，栓钉根部混凝土局部压碎，但是与平板混凝土板中栓钉的破坏位置不同，所研究的栓钉剪断破坏的位置在钢梁上翼缘处，而不是在栓钉根部焊缝处，这也在很大程度上导致了钢筋桁架楼承板中栓钉受剪承载力比平板混凝土板中栓钉低。钢筋桁架楼承板中栓钉的受剪承载力和刚度均随温度的升高而降低。通过对试验数据的分析，提出了钢筋桁架楼承板中栓钉高温下受剪承载力和荷载-滑移曲线的计算方法。
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| 关 键 词： | 高温 栓钉 钢筋桁架楼承板 受剪承载力 |
Experimental studies on behavior of headed stud shear connectors embedded in steel bar truss floor slabs at elevated temperatures |
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| CHEN Lingzhu,LI Guoqiang,JIANG Shouchao,WANG Weiyong,RANZI Gianluca.Experimental studies on behavior of headed stud shear connectors embedded in steel bar truss floor slabs at elevated temperatures[J].Journal of Building Structures,2015,36(5):116-123. |
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| Authors: | CHEN Lingzhu LI Guoqiang JIANG Shouchao WANG Weiyong RANZI Gianluca |
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| Affiliation: | 1. College of Civil Engineering, Tongji University, Shanghai 200092, China；;
2. School of Civil Engineering, The University of Sydney, Sydney NSW2006，Australia; ;
3. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092,China; ;
4. School of Civil Engineering, Chongqing University, Chongqing 400045, China |
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| Abstract: | Fifteen push-out test specimens were designed and prepared to be tested at both ambient and elevated temperatures to investigate the performance of shear studs embedded in steel bar truss floor slabs. During the experiments, the temperature distribution along the thickness of concrete slab close to the place of shear studs and the temperature distribution along the axis of shear studs were recorded, and the shear capacities of shear studs were evaluated. Results show that the failure modes observed for both ambient and elevated temperature tests include fracture of the shear studs and local crushing of concrete close to the base of shear connectors. Unlike the case of shear studs embedded in solid slabs, in which case fracture of the shear studs takes place just above the weld collar, the failure mode observed in the steel bar truss floor slabs was fracture of the stud just above the steel flange. The change in fracture plane produces a lower capacity of connectors in steel bar truss slabs compared with connectors in solid slabs. For this purpose, design equations are proposed to calculate the shear capacity and load-slip relationship for shear studs embedded in steel bar truss floor slabs at elevated temperatures. |
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| Keywords: | steel bar truss floor slab shear stud elevated temperature shear capacity |
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