- 摘 要
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（1 天津大學(xué)水利工程仿真與安全國家重點實驗室， 天津 300072；2 天津大學(xué)建筑工程學(xué)院， 天津 300072）
［摘要］根據(jù)陸上風(fēng)機圓形擴展基礎(chǔ)的外形特征和受力特性，結(jié)合E.Reissner和R.D.Mindlin板彎曲理論，將風(fēng)機擴展基礎(chǔ)底板等效為內(nèi)邊緣剛接且外邊緣自由的變厚板，建立彈性理論的內(nèi)力平衡方程，并采用常數(shù)變易和迭代法求解得到了基礎(chǔ)底板內(nèi)力的解析解；同時，探究了基礎(chǔ)底板徑向彎矩和環(huán)向彎矩的關(guān)系，二者的比值在小范圍區(qū)間內(nèi)變動，這為風(fēng)機基礎(chǔ)內(nèi)力簡化計算方法提供了一定理論參考；基于三維有限元軟件ABAQUS，采用單一變量法研究了土體變形模量、內(nèi)摩擦角、黏聚力對基礎(chǔ)傾斜率、基底脫開率和脫開面積的影響規(guī)律，得出了土體變形模量是其主要的影響因素。
［關(guān)鍵詞］擴展基礎(chǔ)； 板彎曲； 變厚板； 基礎(chǔ)傾斜率； 基底脫開
中圖分類號：TU470+.3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)03-0129-08
Analysis of internal force and disengagement law for circular expansion foundation plate of onshore wind turbine
Zhang Puyang1,2， Zeng Bin2， Ding Hongyan1,2， Guo Yaohua2
(1 State Key Laboratory of Hydraulic Engineering Simulation and Safety（Tianjin University）， Tianjin 300072， China;2 School of Civil Engineering， Tianjin University， Tianjin 300072， China)
Abstract:According to the shape characteristics and mechanical characteristics of the circular expansion foundation of the onshore wind turbine, the plate bending theories of E. Reissner and R. D. Mindlin were combined to make the expansion foundation plate of the wind turbine equivalent to a plate of variable thicknesses with a rigid inner edge and a free outer edge. The internal force equilibrium equation of the elastic theory was established, and the analytical solution of the internal force of the foundation plate was obtained by constant change and iterative methods. At the same time, the relationship between the radial bending moment and the circumferential bending moment of the foundation plate was explored, and the ratio of the moments was in a small range. This provided a certain theoretical reference for the simplified calculation method of the foundation internal force of the wind turbine. Based on the three-dimensional finite element software ABAQUS, the single-variable method was used to research the influence laws of deformation modulus, internal friction angle and cohesion of the soil on the foundation slope, foundation disengagement rate and the disengagement area; it′s obtained that the deformation modulus of the soil was the main influencing factor.
Keywords:circular expansion foundation; plate bending; plate of variable thicknesses; foundation inclination rate; foundation bottom disengagement
作者簡介：張浦陽，博士，副教授，Email：zpy_td@163.com。
