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（內(nèi)蒙古科技大學(xué)土木工程學(xué)院， 包頭 014010）

［摘要］在重復(fù)荷載和單調(diào)荷載作用下進(jìn)行12個(gè)栓釘抗剪連接件推出試驗(yàn)，對(duì)鋼-混凝土組合結(jié)構(gòu)中栓釘?shù)钠茐哪Ｊ?、屈服模式、疲勞機(jī)制、承載力、剛度退化、耗能等動(dòng)力性能與靜力性能進(jìn)行研究，重點(diǎn)分析了栓釘直徑、混凝土強(qiáng)度等參數(shù)對(duì)栓釘?shù)钠谛阅芎涂辜粜阅艿挠绊?。研究結(jié)果表明：栓釘抗剪連接件的破壞模式有栓釘剪斷和混凝土開(kāi)裂，在重復(fù)荷載下表現(xiàn)出疲勞現(xiàn)象，如承載力下降、混凝土初始裂縫的發(fā)展。單調(diào)荷載下，栓釘?shù)闹睆接?3mm增加為16mm時(shí)承載力提高20-55%，栓釘直徑由16mm增加為19mm時(shí)極限承載力提高11-7%。混凝土強(qiáng)度等級(jí)從C30提高到C50，對(duì)應(yīng)承載力也有一定提高，增幅為3%。重復(fù)荷載下栓釘直徑由13mm增加為16mm時(shí)，承載力提高35%，初始剛度提升明顯，耗能能力提高40%?；炷翉?qiáng)度的提高對(duì)承載力和初始剛度影響不明顯，但剛度退化穩(wěn)定，耗能能力提高27-5%～ 47-3%。整體來(lái)看，栓釘抗剪連接件表現(xiàn)出良好的抗疲勞能力。

［關(guān)鍵詞］栓釘抗剪連接件； 推出試驗(yàn)； 重復(fù)加載； 疲勞性能； 抗剪性能

中圖分類號(hào)：TU398文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)23-0097-05

Performance study on stud shear connectors under repeated loads

Zhao Gentian, Zhang Yi, Jiang Wei, Liang Youteng

(Inner Mongolia University of Science & Technology, Baotou 014010,  China)

Abstract:Based on the push-out test of 12 stud shear connectors under repeated loads and monotonic loads, dynamic and static performances of the studs in the steel-concrete composite structure were investigated, including the failure modes, yield patterns, fatigue mechanism, bearing capacity, stiffness degradation and energy dissipation performance. And the influence of the parameters on the fatigue performance and shear resistance of the studs were analyzed such as the diameter of the stud and the strength of the concrete. The results show that the failure modes can be divided into stud shear failure and concrete crack. And the fatigue phenomenon under repeated loads occurs such as decrease of bearing capacity and the development of the initial cracks in the concrete. Under monotonic loads, the bearing capacity is increased by 20-55% when the diameter of studs is increased from 13mm to 16mm, and the ultimate bearing capacity is increased by 11-7% when the diameter of studs is increased from 16mm to 19mm. When the strength of concrete is increased from C30 to C50, the corresponding bearing capacity is also increased by 3%. When the diameter of studs is increased from 13mm to 16mm under repeated loads, the bearing capacity is increased by 35%, and the initial stiffness is increased significantly, and the energy dissipation capacity is increased by 40%. The increase of concrete strength has no obvious influence on bearing capacity and initial stiffness, but the stiffness degrades steadily and the energy dissipation capacity is increased by 27-5%～ 47-3%. On the whole, the stud shear connector shows good fatigue performance.

Keywords:stud shear connector; push-out test; repeated loading; fatigue performance; shear performance

*內(nèi)蒙古自然科學(xué)基金項(xiàng)目（2016MS0546）。

作者簡(jiǎn)介：趙根田，博士，教授，Email：zhaogentian93110@sina.com。