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分组栓钉连接件抗剪性能研究

Study on the Shear Resistance Performance of Grouped Stud Connectors.

作者信息

Lu Wenru, Huang Yuanming, Xu Wenhan

机构信息

School of Civil Engineering, Henan University of Technology, Zhengzhou 450001, China.

Henan Key Laboratory of Grain and Oil Storage Facility & Safety HAUT, Zhengzhou 450001, China.

出版信息

Materials (Basel). 2023 Oct 10;16(20):6625. doi: 10.3390/ma16206625.

DOI:10.3390/ma16206625
PMID:37895607
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10608247/
Abstract

In order to further investigate the grouped stud effect on the force properties of stud connectors, based on the premise that the correctness of the finite element simulation method, in this paper, a finite element model of grouped stud connectors was developed, and the grouped stud effect and its sensitivity factors were analyzed in order to validate the recommended formula for calculating the shear capacity of grouped stud connectors. Results show that the number of grouped stud rows and stud row spacing have a significant influence on the grouped stud effect, and the unevenness coefficient of grouped stud force is negatively correlated with the number of grouped stud rows as well as the grouped stud row spacing. Grouped stud connectors with commonly used concrete grades greater than C50 and height-to-diameter ratios of greater than 4 in steel-concrete composite structural bridges are insensitive to changes in the concrete strength grades and the length of the studs. The direction of force transmission for grouped stud changes with the change in loading angle and the unevenness coefficient of force for the grouped stud will therefore be reduced. By comparing the results of the 62 existing groups of grouped stud connectors push-out tests, the mean of the tested to calculated value ratio was found to be 1.12, the variance was 0.023, the dispersion was small, and it was shown that the recommended formula has a high degree of accuracy. The results of this paper can be used as a theoretical basis for the study of the shear stress performance of grouped stud connectors.

摘要

为了进一步研究群钉对钉连接件受力性能的影响，在有限元模拟方法正确的前提下，本文建立了群钉连接件的有限元模型，分析了群钉效应及其敏感因素，以验证群钉连接件抗剪承载力的推荐计算公式。结果表明，群钉排数和钉排间距对群钉效应有显著影响，群钉受力不均匀系数与群钉排数和钉排间距呈负相关。在钢 - 混凝土组合结构桥梁中，常用混凝土强度等级大于C50且钉高径比大于4的群钉连接件对混凝土强度等级和钉长的变化不敏感。群钉的传力方向随加载角度的变化而变化，群钉受力不均匀系数也会因此减小。通过比较62组现有群钉连接件推出试验的结果，得到试验值与计算值的比值均值为1.12，方差为0.023，离散性小，表明推荐公式具有较高的精度。本文结果可为群钉连接件剪应力性能研究提供理论依据。

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本文引用的文献

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Materials (Basel). 2022 Jul 23;15(15):5125. doi: 10.3390/ma15155125.