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The Global Stability Performance and Design Method of the Mono-Overhanging Steel Beam

机译:单悬挑钢梁的整体稳定性及设计方法

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摘要

This article presents a research and design method for the global stability of the mono-overhang steel beam, which is very different from other kinds of beams. First, the total potential energy equation of the mono-overhanging beam is deduced by energy method. Then, the critical bending moment formula of the global stability is deduced based on its boundary conditions. Second, by introducing the equivalent calculated length coefficient, the critical bending moment equation is transformed into the form that is the same as that of a simply supported beam subjected to the uniform moment. This transformation can make stable design more convenient. At last, the impact factors of the calculated length coefficient of the global stability are determined. Furthermore, the formulas of the equivalent calculated length coefficients are proposed, which reflect the comprehensive interrelation between the equivalent calculated length coefficient and its impact factors. These formulas are continuous functions so that the calculation results are more precise and practical than before because in the previous method, the calculated length coefficient is taken as a piecewise constant value, which has led to a large error in the past.
机译:本文提出了一种单悬臂钢梁整体稳定性的研究和设计方法,该方法与其他类型的梁有很大的不同。首先,通过能量法推导了单悬伸梁的总势能方程。然后,根据边界条件推导了整体稳定性的临界弯矩公式。第二,通过引入等效的计算长度系数,将临界弯矩方程式转换为与受到均匀弯矩的简支梁相同的形式。这种转换可以使稳定的设计更加方便。最后,确定了计算得到的整体稳定性长度系数的影响因素。此外,提出了等效计算长度系数的公式,反映了等效计算长度系数与其影响因子之间的综合关系。这些公式是连续函数,因此计算结果比以前更精确和实用,因为在以前的方法中,将计算出的长度系数作为分段常数值,这在过去导致了较大的误差。

著录项

  • 来源
    《Journal of testing and evaluation》 |2019年第3期|1-11|共11页
  • 作者

    Li Kun; Sun Kaichang;

  • 作者单位

    China Three Gorges Univ, Hubei Prov Key Lab Hazards Prevent & Alleviat, 8 Univ Ave, Yichang 443002, Hubei, Peoples R China;

    China Three Gorges Univ, Coll Hydraul & Environm Engn, 8 Univ Ave, Yichang 443002, Hubei, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    global stability; design method; mono-overhanging steel beam;

    机译:整体稳定性;设计方法;单悬臂钢梁;

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