本文選題：橫向慣性 + 擴(kuò)散虛土樁�。� 參考：《巖土力學(xué)》2017年09期

【摘要】：考慮樁身的橫向慣性效應(yīng)和樁端土應(yīng)力擴(kuò)散效應(yīng),進(jìn)行了成層土樁的縱向振動(dòng)研究。在樁-土模型中,將樁身等效為Rayleigh-Love桿,樁端土對(duì)樁身的支承作用簡(jiǎn)化為擴(kuò)散虛土樁模型,采用平面應(yīng)變模型來描述樁與樁側(cè)土的相互作用。結(jié)合初始條件、邊界條件和連續(xù)條件,并通過積分變換法和阻抗函數(shù)遞推法,得到半正弦激振脈沖作用下樁頂?shù)膭?dòng)力響應(yīng)理論解。建立樁-土系統(tǒng)的有限元模型,進(jìn)行數(shù)值計(jì)算。分別利用理論解和數(shù)值解分析脈沖寬度、樁徑、虛土樁樁長(zhǎng)和樁側(cè)土夾層等相關(guān)參數(shù)對(duì)樁頂速度時(shí)域曲線的影響,并得出了兩種方法的對(duì)比結(jié)果,互相驗(yàn)證了所建模型的正確性。
[Abstract]:The longitudinal vibration of layered soil pile was studied by considering the lateral inertia effect of pile body and the stress diffusion effect of soil at the end of the pile.In the pile-soil model, the pile body is equivalent to the Rayleigh-Love rod, and the supporting action of the pile end soil to the pile body is simplified as the diffusion fictitious soil pile model. The plane strain model is used to describe the interaction between the pile and the pile-side soil.Combined with initial condition, boundary condition and continuous condition, the theoretical solution of dynamic response of pile top under the action of half-sinusoidal vibration pulse is obtained by means of integral transformation method and impedance function recursive method.The finite element model of pile-soil system is established and the numerical calculation is carried out.The effects of the parameters such as pulse width, pile diameter, pile length and soil intercalation on the time-domain velocity curves of the pile are analyzed by theoretical and numerical solutions, and the results of comparison between the two methods are obtained.The correctness of the model is verified by each other.
【作者單位】： 蘇州科技大學(xué)土木工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(No.51508369) 江蘇省自然科學(xué)基金項(xiàng)目(No.BK20150289)~~
【分類號(hào)】：TU473.1
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本文編號(hào)：1734665