【摘要】：考慮樁基的剪切變形影響,利用單廣義位移深梁理論,建立了樁基m法的計算方法,導(dǎo)出了水平位移、轉(zhuǎn)角、彎矩和剪力的初參數(shù)表達式和無量綱參數(shù)函數(shù)的統(tǒng)一表達式,根據(jù)樁底邊界條件建立了初參數(shù)解的計算公式;給出了無量綱參數(shù)函數(shù)隨換算深度和彎剪剛度比的變化圖形。研究表明,換算深度小于3.0時,彎剪剛度比對無量綱參數(shù)函數(shù)影響較小,換算深度大于4.0時,彎剪剛度比對無量綱參數(shù)函數(shù)影響的趨勢非常明顯,樁基剪切變形的影響程度與樁的邊界條件有關(guān)。算例結(jié)果表明,樁身的剪切變形有增大樁頂水平位移、提高彎矩零點位置、改變彎矩分布特征、擴大樁側(cè)土壓力大小等影響。
[Abstract]:Considering the effect of shear deformation on pile foundation, the calculation method of m method for pile foundation is established by using the theory of single generalized displacement deep beam. The expressions of initial parameters of horizontal displacement, rotation angle, moment and shear force and the dimensionless parametric function are derived. According to the boundary condition of pile bottom, the calculation formula of initial parameter solution is established, and the graph of dimensionless parameter function changing with conversion depth and bending shear stiffness ratio is given. The results show that when the conversion depth is less than 3.0, the effect of bending shear stiffness ratio on dimensionless parametric function is smaller than that of non-dimensional shear stiffness ratio, and when the conversion depth is greater than 4.0, the effect of bending shear stiffness ratio on dimensionless parametric function is very obvious. The influence of shear deformation of pile foundation is related to the boundary condition of pile. The results show that the shear deformation of the pile body has the effects of increasing the horizontal displacement of the pile top, increasing the position of the moment zero, changing the distribution characteristics of the moment and expanding the soil pressure on the side of the pile.
【作者單位】： 長沙理工大學(xué)土木與建筑學(xué)院;
【基金】：國家自然科學(xué)基金(51278072) 湖南交通科技創(chuàng)新項目(201452)~~
【分類號】：TU473.1

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