有限差分法分析復(fù)合地基沉降計(jì)算深度
毛 前 龔曉南
- 摘 要
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毛 前 （浙江水電?？茖W(xué)校水利系 杭州 310016）龔曉南 （浙江大學(xué)土木系 杭州 310027）[提要] 運(yùn)用快速拉格朗日元有限差分分析程序FLAC，對復(fù)合地基在局部均布荷載作用下的附加應(yīng)力分布和變形場進(jìn)行了分析，討論了復(fù)合模量與周圍土的模量之比Ec/Es以及加固區(qū)高寬比L/B兩個(gè)指標(biāo)對下臥層的應(yīng)力集中和變形場的影響，并進(jìn)而探討了下臥層計(jì)算深度的確定問題。
[關(guān)鍵詞] 復(fù)合地基 下臥層 有限差分 計(jì)算深度
With an explicit finite difference program FLAC, the superimposd stress distribution and displancement field of composite groud is analysed, and then the influence on the stress concentration and displacement field caused by the two index Ec/Es, the ratio about composite modulus to round soil modulus, and L/B, the ratio about depth to width of reinforced area is discussed. Further more, the problem of determining the calculate depth of the compression zone is also discussed.
Keywords: composite ground; substratum; finite differnce; calculate depth
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