王瑞, 胡志平, 夏香波, 任翔, 熊帆. 2016: 近地裂缝处层状场地自振频率的剪切梁法初探. 工程地质学报, 24(s1): 571-576. DOI: 10.13544/j.cnki.jeg.2016.s1.083
    引用本文: 王瑞, 胡志平, 夏香波, 任翔, 熊帆. 2016: 近地裂缝处层状场地自振频率的剪切梁法初探. 工程地质学报, 24(s1): 571-576. DOI: 10.13544/j.cnki.jeg.2016.s1.083
    WANG Rui, HU Zhiping, XIA Xiangbo, REN Xiang, XIONG Fan. 2016: EXPLORATION ON SHEAR BEAM METHOD FOR NATURAL FREQUENCY OF LAYERED SITE NEARBY THE GROUND FISSURE. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 571-576. DOI: 10.13544/j.cnki.jeg.2016.s1.083
    Citation: WANG Rui, HU Zhiping, XIA Xiangbo, REN Xiang, XIONG Fan. 2016: EXPLORATION ON SHEAR BEAM METHOD FOR NATURAL FREQUENCY OF LAYERED SITE NEARBY THE GROUND FISSURE. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 571-576. DOI: 10.13544/j.cnki.jeg.2016.s1.083

    近地裂缝处层状场地自振频率的剪切梁法初探

    EXPLORATION ON SHEAR BEAM METHOD FOR NATURAL FREQUENCY OF LAYERED SITE NEARBY THE GROUND FISSURE

    • 摘要: 为了探究近地裂缝处场地自振频率的计算方法,本文在传统剪切梁法的基础上假设地裂缝上下盘水平位移连续,推倒了地裂缝上下盘处单层及任意多层场地自振频率的递推公式和隐式解答,并且与正常场地剪切梁法结果进行了对比。结果显示:近地裂缝处上盘场地基频比正常场地偏低、下盘场地基频则偏高,并且随着计算范围的扩大上下盘场地的基频越来越接近正常场地解。另外,随着自振频率阶数的提高,本文解也逐渐接近正常场地解。上述结论表明,本文得出的近地裂缝处场地自振频率的隐式解答还是比较合理的。

       

      Abstract: To explore the analysis mothed of natural frequency for the site closing to ground fissure, the recursion formula and implicit analytic solution of single and random multi-layer site were derived based on the traditional shear beam model with the assumption of horizontal displacement continuity. In comparison with the solution of normal site, the fundamental frequency of hanging side site is smaller than normal site's and the heading side site is inverse. Furthermore, the fundamental frequency of hanging and heading side site will close the solution of normal site with the increase of the calculating width. If the order of natural frequency enhance, the solution in this paper will more and more closing the normal site solution. The solution indicate that the implicit analytic solution of closing ground fissure site resented by this paper is reasonable.

       

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