土石混合體二維細觀結構模型的建立與數值流形法模擬
[Abstract]:As a common geotechnical engineering material, numerical simulation of soil-rock mixture can provide direct basis for engineering construction. The numerical simulation of soil and rock mixture includes modeling and simulation. In the stage of modeling, the background grid-EAB block placement algorithm based on the stone contact theory is proposed. The new algorithm avoids the repeated dropping of the block stone and the judgment of overlap between the blocks, and improves the efficiency of the modeling of the block stone. In the stage of numerical simulation, the numerical manifold method (NMM) is applied to the simulation of two-dimensional soil-rock mixture, and the computational model of two-dimensional soil-rock mixture is simplified adaptively. A unified mathematical covering model for soil mass is established. The model can be used to simulate the interaction between rock filling and other granular systems and continuum media. Finally, the influence of confining pressure on the peak compressive strength of soil-rock mixture and the influence of soil and rock dislocation on the evolution of compressive strength of soil-rock mixture are demonstrated by an example of compression test of two-dimensional soil-rock mixture. The validity and applicability of the model in simulating the interaction between bulk system and continuum medium are verified.
【作者單位】: 中國科學院武漢巖土力學研究所巖土力學與工程國家重點實驗室;河南工業(yè)大學土木建筑學院;
【基金】:“973”項目資助(No.2014CB047100) 國家自然科學基金項目資助(No.11572009,No.51538001,No.51609240)~~
【分類號】:TU43
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