[1]安然,王有志,周磊,等.剪力钉连接件拉剪复合作用试验及计算模型[J].长安大学学报(自然科学版),2020,40(3):42-52.
 AN Ran,WANG You zhi,ZHOU Lei,et al.Experiment and analytical model of sheer stud connectorsunder combined tension and shear force[J].Journal of Chang’an University (Natural Science Edition),2020,40(3):42-52.
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剪力钉连接件拉剪复合作用试验及计算模型()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年3期
页码:
42-52
栏目:
桥梁与隧道工程
出版日期:
2020-05-15

文章信息/Info

Title:
Experiment and analytical model of sheer stud connectorsunder combined tension and shear force
作者:
安然王有志周磊许晓杰
(1. 山东大学 土建与水利学院,山东 济南 250061; 2. 山东省公路桥梁建设有限公司,山东 济南 250021)
Author(s):
AN Ran1 WANG Youzhi1 ZHOU Lei1 XU Xiaojie2
(1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China; 2. Shandong Highway &Bridge Construction Co., Ltd., Jinan 250021, Shandong, China)
关键词:
桥梁工程剪力钉连接件推出试验计算模型
Keywords:
bridge engineering shear stud connector pushout test analytical model
文献标志码:
A
摘要:
为了明确钢混组合梁桥中剪力钉连接件在拉剪共同作用下的承载性能,设计并进行了5组高强混凝土剪力钉抗拉、抗剪和拉剪复合作用模型试验,得到了剪力钉的荷载滑移曲线,分析比较了不同荷载条件下剪力钉的破坏模式与抗剪性能。结合试验结果,推导了拉力作用下剪力钉弹性变形阶段、塑性发展阶段的荷载滑移关系式,提出了拉剪复合作用荷载滑移关系三折线形计算模型;基于试验结果和相关文献数据,分析评价了不同规范中剪力钉抗拉、抗剪承载力的计算公式,并提出了改进的拉剪复合作用承载力关系式。研究结果表明:拉剪复合作用下,试件抗剪承载力随拉力的增加显著减小,当拉力施力比为0.6时,抗剪承载力较纯剪切状态减小约31%;拉力会导致剪力钉的弹性剪切刚度下降,但对滑移性能的影响没有明显规律。提出的改进拉剪复合作用承载力计算公式与相关试验数据吻合较好;建立的三折线形模型计算结果安全,能准确预测拉剪复合作用下剪力钉连接件荷载滑移曲线的发展规律,体现拉力对剪切刚度和抗剪承载力的折减作用。
Abstract:
In order to investigate the shear behavior of shear stud connectors in steelconcrete composite beams under combined tension and shear force, five groups of specimens in high strength concrete were prepared and tested, including pullout tests, pushout tests and pushout tests subjected to tension force. The loadslip curves were obtained, and the failure modes and shear behavior of shear stud connectors under different loading conditions were presented and compared. According to experimental results, the loadslip relationships in elastic stage and plastic development stage under tension were derived, then a trilinear analytical model of loadslip curve under combined loading was established. Formulas for calculating the tension and shear capacity of shear studs in different codes were analyzed and evaluated based on test data from this paper and other researches, and an improved interaction expression for calculating the capacities under combined loading was proposed. The results show that the ultimate shear strength decreases significantly with the increase of tension under combined loading. The maximum reduction of shear strength is about 31% when the applied tension force equals 0.6 of the ultimate tensile strength. Tension force also lead to decrease of elastic shear stiffness, but has no obvious affection on the sliding performance. The proposed interaction expression agrees well with the test results. The established trilinear analytical model provides safe and accurate prediction on the development of loadslip curves of shear stud connectors under combined loading, and is capable of reflecting reduction of shear stiffness and shear strength caused by tension force. 6 tabs, 10 figs, 28 refs.

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更新日期/Last Update: 2020-06-03