本文關(guān)鍵詞： 旁壓試驗(yàn) SMP屈服準(zhǔn)則 Rowe法則 彈塑性 本構(gòu)關(guān)系　出處：《巖土力學(xué)》2015年S1期 　論文類型：期刊論文

【摘要】：在大量旁壓試驗(yàn)數(shù)據(jù)分析的基礎(chǔ)上,通過曲線擬合,建立了旁壓試驗(yàn)彈塑性階段曲線的橢圓方程,利用土體SMP屈服準(zhǔn)則和Rowe流動(dòng)法則,推導(dǎo)出土體塑性階段應(yīng)力增量與應(yīng)變?cè)隽块g關(guān)系矩陣。在彈性階段,假設(shè)土體應(yīng)力-應(yīng)變服從廣義虎克定律,建立了基于旁壓試驗(yàn)的土體彈塑性本構(gòu)模型。編制了相應(yīng)的計(jì)算程序,將文中模型計(jì)算結(jié)果與實(shí)際旁壓試驗(yàn)曲線進(jìn)行對(duì)比,初步驗(yàn)證了模型的正確性。將本構(gòu)模型編譯為ABAQUS自定義材料子程序UMAT,通過有限元對(duì)比分析,文中模型計(jì)算變形較彈性模型小,較摩爾-庫侖模型大,與模型建立的假設(shè)一致。基于旁壓試驗(yàn)的土體彈塑性本構(gòu)模型參數(shù)少,且易于獲取,便于在實(shí)際工程中應(yīng)用。
[Abstract]:Based on the analysis of a large number of pressure-pressure-test data, the elliptic equation of the elastic-plastic stage curve of the pressure-pressure-test is established through curve fitting, and the SMP yield criterion and Rowe flow rule of soil are used. The matrix of the relationship between stress increment and strain increment in plastic stage of soil is derived. In elastic stage, the stress-strain of soil is assumed to be based on generalized Hook's law. A soil elastoplastic constitutive model based on pressure-pressure-test is established, and the corresponding calculation program is worked out. The calculated results of the model are compared with the actual pressure-test curve. The constitutive model is compiled into ABAQUS custom material subroutine Umatt. The finite element analysis shows that the deformation of the model is smaller than that of elastic model and larger than that of Mohr-Coulomb model. The soil elastoplastic constitutive model based on the pressure-pressure test has few parameters and is easy to be obtained, so it is easy to be applied in practical engineering.
【作者單位】： 上海巖土工程勘察設(shè)計(jì)研究院有限公司;
【基金】：上海市科學(xué)技術(shù)委員會(huì)資助項(xiàng)目(No.10231203500,No.09dz1207705)
【分類號(hào)】：TU43

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 張新兵，陳映南，姜前，，張佩知;用有限元方法分析旁壓試驗(yàn)特征值[J];長沙鐵道學(xué)院學(xué)報(bào);1995年04期

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐習(xí)龍;林可勃;賈妮;李忠;;結(jié)構(gòu)計(jì)算軟件中的模塊化設(shè)計(jì)[J];四川建筑科學(xué)研究;2005年06期

2 錢坤;尹新生;朱珊;佴磊;;三維地基沉降計(jì)算公式的改進(jìn)與比較[J];四川建筑科學(xué)研究;2009年03期

3 熊學(xué)玉;王紹輝;;現(xiàn)澆空心板的正交異性板理論分析方法的研究[J];四川建筑科學(xué)研究;2010年05期

4 郝婷s

本文編號(hào)：1547920