基于薄壁圓柱殼理論的盾構(gòu)隧道抗震擬靜力分析法
[Abstract]:In order to simplify the seismic analysis of shield tunnel, based on the theory of elastic thin-walled cylindrical shell, the shear strain and shear stress of free field around the deep buried shield tunnel are obtained. The formula for calculating the additional internal force under the action of horizontal seismic shear wave of deep buried shield tunnel is given, and the results are compared with the results of numerical analysis of equivalent stiffness under the same conditions. The results show that the quasi-static calculation results are in good agreement with the corresponding numerical results under the conditions of slip and non-slip. It is shown that the quasi-static formula of shield tunnel based on the elastic thin-walled cylindrical shell theory is reasonable. The results also show that the additional moment and shear force under the sliding condition are larger than those under the condition of non-slip, respectively, under the horizontal seismic shear wave, the additional moment and the additional shear force under the sliding condition are larger than the additional moment and the additional shear force under the condition of non-slip respectively. The additional axial force under sliding condition is smaller than that under non-slip condition, and the additional bending moment and additional axial force show antisymmetric distribution characteristics. The maximum values of the additional axial force are usually distributed on 45 擄and 225 擄radar symmetry axes or 135 擄and 315 擄radar symmetry axes. The maximum value of additional shear force is generally distributed on the symmetry axis of 0 擄and 180 擄radar. The research results have certain reference value for shield tunnel seismic design.
【作者單位】: 西南交通大學(xué)交通隧道工程教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】:教育部新世紀(jì)人才資助項(xiàng)目(NCET-11-0713) 國(guó)家科技支撐計(jì)劃課題(2013BAB10B04) 國(guó)家自然科學(xué)基金項(xiàng)目(51178400,U1134208)
【分類(lèi)號(hào)】:U455.43;U452.28
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