Elastic half - space theory of foundation vibration 動(dòng)力機(jī)器基礎(chǔ)基礎(chǔ)振動(dòng)半空間理論
( 3 ) fem basic theory of foundation pit excavation stimulation is expounded , numerical model and method of construction simulation are determinated , which includes simplification of two - dimension problem and constitutive model of soil mass i . e . constitutive model of duncan - chang hyperbola model , numerical ways of initial situ stress , stimulation of equal nodal load of foundation pit excavation , nonlinear solutions of basic equations , fem disposing of inner supporting and pre - axial force etc . further fem code of stimulation of foundation pit excavation is compiled 闡述了基坑開挖模擬的有限元基本理論,確定計(jì)算模型及施工模擬方法。包括二維問題的簡化、土體的本構(gòu)模型,即鄧肯-張雙曲線本構(gòu)模型、初始地應(yīng)力場的計(jì)算方法、基坑開挖等效結(jié)點(diǎn)荷載模擬、基本方程的非線性解法、內(nèi)支撐及預(yù)加軸力的有限元處理等,并編制了模擬基坑開挖的有限元程序。