【摘要】：給出了小剪切變形下的基樁P-Δ效應(yīng)和大剪切變形下支座P-Δ效應(yīng)計(jì)算的桿單元?jiǎng)偠染仃嚪匠�。假定桿單元彎曲變形位移函數(shù)為三次冪函數(shù),剪切變形函數(shù)為線性函數(shù),根據(jù)有限元法一般原理,推導(dǎo)了一種同時(shí)計(jì)入豎向力徑向剪切分力剪切變形和水平力剪切變形的P-Δ效應(yīng)桿單元?jiǎng)偠确匠?推導(dǎo)了一種僅計(jì)入豎向力徑向剪切分力剪切變形而忽略水平力剪切變形的P-Δ效應(yīng)桿單元?jiǎng)偠确匠?推導(dǎo)了一種僅計(jì)入水平力剪切變形而忽略豎向力徑向剪切分力剪切變形的P-Δ效應(yīng)桿單元?jiǎng)偠确匠�。�?jì)入水平力剪切變形而忽略豎向力徑向剪切分力剪切變形的P-Δ效應(yīng)桿單元可良好的模擬支座在大剪切變形下的偏心工作特性,能實(shí)時(shí)計(jì)入其偏心彎矩影響,為實(shí)時(shí)計(jì)入支座偏心特性的結(jié)構(gòu)動(dòng)靜力分析提供了理論支撐。最后通過(guò)自編MATLAB程序進(jìn)行算例分析,結(jié)果表明,計(jì)入支座大剪切變下的P-Δ效應(yīng)后,基樁內(nèi)力位移和地基土壓力均顯著增大�；鶚蹲陨砑羟凶冃螌�(duì)樁身內(nèi)力位移和地基土壓力影響較小,可以忽略。
[Abstract]:The stiffness matrix equations of the P螖 effect of the foundation pile under small shear deformation and the P螖 effect of the bearing under large shear deformation are given. It is assumed that the bending deformation displacement function of the rod element is a cubic power function and the shear deformation function is a linear function. According to the general principle of the finite element method, A P-螖 effect bar element stiffness equation considering both vertical force radial shear force shear deformation and horizontal force shear deformation is derived. The stiffness equation of P-螖 effect bar element is derived, which only takes into account the shear deformation of vertical force radial shear component force and ignores the shear deformation of horizontal force. In this paper, the stiffness equation of P-螖 effect bar element is derived, which only takes into account the shear deformation of horizontal force and ignores the shear deformation of radial shear force of vertical force. The P-螖 effect bar element, which takes into account the horizontal force shear deformation and neglects the vertical force radial shear force shear deformation, can well simulate the eccentric working characteristics of the bearing under large shear deformation, and can take into account the influence of eccentric bending moment in real time. It provides a theoretical support for the dynamic and static analysis of the structure which takes into account the eccentricity of the bearing in real time. Finally, an example is given by MATLAB program. The results show that the internal force and displacement of the foundation pile and the earth pressure of the foundation increase significantly after taking into account the P-螖 effect of the large shear deformation of the bearing. The shear deformation of the foundation pile has little effect on the internal force and displacement of the pile body and the earth pressure of the foundation, which can be ignored.
【作者單位】： 中南大學(xué)土木工程學(xué)院;中煤科工集團(tuán)重慶設(shè)計(jì)研究院有限公司;
【分類號(hào)】：TU473.1

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1 王蔭長(zhǎng);;關(guān)于桿件結(jié)構(gòu)剪切變形的分析[J];西安建筑科技大學(xué)學(xué)報(bào)(自然科學(xué)版);1982年04期

2 胡給泗;;剪切變形曲線特征點(diǎn)的確定[J];人民長(zhǎng)江;1988年07期

3 陳麗華;孫s，

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