局部开孔对矩形钢板抗剪承载能力影响研究
Investigation on the Influence of Local Opening on Shear Capacity of Rectangular Steel Plates
由于钢板具有优越的抗剪性能,故其被广泛地应用于建筑结构以及船舶海洋工程中。在实际工程中,由于使用中的需要或者锈蚀等原因,钢板开孔的现象屡见不鲜。开孔会减小钢板的有效抗剪面积进而降低抗剪承载能力。本文开展了矩形孔和圆形孔两种开孔类型对钢板抗剪承载力影响的研究。通过试验研究了开孔位置、开孔率对钢板抗剪承载力的影响。结果表明:开孔位置对钢板抗剪承载力有显著影响;抗剪承载力的降低程度不能简单通过开孔率进行评估。在此基础上,通过理论和试验验证了数值模型的可靠性,进而通过参数分析研究了两种开孔形状在不同位置和不同高宽比下对钢板抗剪承载力的影响规律,提出了衡量抗剪承载力降低程度的折减系数及其理论计算公式。通过对比结果可以得出,所提出的理论计算公式可以准确衡量开孔位置对钢板抗剪承载力的影响,可为开孔钢板抗剪承载力的准确评估提供参考。
Steel plates have been widely adopted in building structures and marine engineering. The steel plates with opening are always needed due to the using function or corrosion caused by surrounding environment. The opening can reduce the effective shear area and then decrease the shear capacity. The influence of rectangular and circle opening on the shear capacity of steel plates is investigated in the presented work. The influence of opening position and opening ratio were studied through experiment. The experimental results indicate that the opening position has obvious influence on the shear capacity and the decrease of shear capacity cannot be simply estimated by the opening ratio. Then, a numerical model was developed and validated by the experimental and theoretical results. A parametric analysis was performed to reveal the influence of opening position on shear strength of steel plates. A reduction factor was proposed to consider the influence of opening and a formula for reduction factor was proposed. The accuracy of the formula was validated through comparison of results. The work presented in this study can provide a foundation for the estimation of shear strength of steel plates.
开孔钢板 / 抗剪承载力 / 开孔位置 / 钢板屈曲 / 强度破坏 / 折减系数
steel plate with opening / shear capacity / position of opening / buckling of steel plate / strength failure / reduction factor
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中国博士后科学基金面上项目(2021M690033)
陕西省交通运输厅交通科研项目(23-49K)
陕西省住建厅科技计划(2023-K21)
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