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   （空軍第六空防工程處，衡陽(yáng)421001）

[摘要]結(jié)構(gòu)性土體破壞機(jī)理不同于重塑土，為研究結(jié)構(gòu)性土體的漸進(jìn)性損傷破壞，針對(duì)傳統(tǒng)本構(gòu)理論不能很好的模擬重塑土的變形特性，編制了結(jié)構(gòu)性土體損傷本構(gòu)模型相應(yīng)的計(jì)算程序，并對(duì)模型參數(shù)進(jìn)行了計(jì)算分析，計(jì)算表明：耗散能越大，剪應(yīng)力峰值越大，結(jié)構(gòu)性破壞所耗散的能量也越多。耗散能可以用來(lái)表征土體結(jié)構(gòu)性強(qiáng)弱的定量指標(biāo)。結(jié)構(gòu)相體積模量和剪切模量反映結(jié)構(gòu)相的彈性性質(zhì)。最后采用損傷模型對(duì)隧道工程進(jìn)行模擬分析嘗試，表明模型能夠較好的模擬工程土體實(shí)際損傷發(fā)展過(guò)程。

[關(guān)鍵詞] 土體；損傷；數(shù)值模擬；本構(gòu)關(guān)系

中圖分類號(hào)：TU528.01    文獻(xiàn)標(biāo)識(shí)碼：A     文章編號(hào)：

Study on the damage constitutive model of geomaterial simulation

Wu Hesheng，Wang Weilong，Zhou Jiawu

(No. 6 Air Defense Engineering Department of PLA Air Force, Hengyang 421001, China)

Abstract: Based on the progressive failure of the structured soil and the failure mechanism, the tradition of the constitutive theory is lack of ability to solve this problem. The damage model is carried out to analyze the engineering project. Through the tunnel engineering numerical example, the tunnel engineering damage distribution and damage evolution process is reached and also indicated the applicability of the damage model.

Keywords: soil; damage; simulation; constitutive relation

參  考  文  獻(xiàn)

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[6]     沈珠江. 土體結(jié)構(gòu)性的數(shù)學(xué)模型[J]. 巖土工程學(xué)報(bào), 1996, 18(1)：95-97．

沈珠江, 章為民. 損傷力學(xué)在土力學(xué)中的應(yīng)用[C]//第三屆全國(guó)巖土力學(xué)數(shù)值分析與解析方法討論會(huì)論文集. 北京：中國(guó)建筑工業(yè)出版社, 1988：595-610.