【摘要】：針對(duì)傳統(tǒng)彈塑性模型的塑性勢(shì)面用于巖土材料時(shí)的兩個(gè)固有缺陷,提出了塑性勢(shì)面區(qū)域的概念和連續(xù)漸變塑性勢(shì)面模型的構(gòu)想,連續(xù)漸變塑性勢(shì)面模型的優(yōu)點(diǎn)就在于塑性勢(shì)面的連續(xù)和漸變,連續(xù)使得在任何屈服面外側(cè)的應(yīng)力路徑下均是一系列連續(xù)的塑性勢(shì)面在起作用,不會(huì)出現(xiàn)一個(gè)塑性勢(shì)面單獨(dú)發(fā)揮作用的情況,從而避免了傳統(tǒng)彈塑性模型僅有一個(gè)塑性勢(shì)面發(fā)揮作用時(shí)不能反映塑性應(yīng)變?cè)隽糠较蚺c應(yīng)力增量有關(guān)的缺陷;漸變使得屈服面處的塑性勢(shì)面產(chǎn)生塑性變形的能力為0,且越接近屈服面的塑性勢(shì)面產(chǎn)生塑性變形的能力越小,無限接近屈服面的塑性勢(shì)面產(chǎn)生塑性變形的能力無限接近于0,從而解決了傳統(tǒng)彈塑性模型屈服面兩側(cè)變形不連續(xù)的問題,將傳統(tǒng)彈塑性模型發(fā)展成為連續(xù)漸變塑性勢(shì)面模型,既能彌補(bǔ)傳統(tǒng)彈塑性模型描述土體性質(zhì)時(shí)的缺陷,又不將彈塑性理論全盤拋棄,是對(duì)傳統(tǒng)彈塑性理論的繼承發(fā)展。
[Abstract]:In view of the two inherent defects of the plastic potential surface of the traditional elastoplastic model used in geotechnical materials, the concept of the plastic potential surface region and the concept of a continuous progressive plastic potential surface model are proposed. The advantage of the continuous progressive plastic potential surface model lies in the continuity and gradual variation of the plastic potential surface, which makes a series of continuous plastic potential surfaces work under any stress path outside the yield surface. There will not be a single plastic potential surface acting on each other, thus avoiding the defects that the traditional elastic-plastic model can not reflect the direction of plastic strain increment and stress increment when only one plastic potential surface is used. The ability of the plastic potential surface at the yield surface to produce plastic deformation is 0, and the ability of the plastic potential surface near the yield surface to produce plastic deformation is smaller, and the ability of the plastic potential surface which is infinitely close to the yield surface to produce plastic deformation is infinitely close to zero. Thus the problem of discontinuous deformation on both sides of the yield surface of traditional elastoplastic model is solved. The traditional elastoplastic model is developed into a continuous gradual plastic potential surface model, which can remedy the defects of the traditional elastoplastic model in describing the properties of soil. It is the inheritance and development of the traditional elastoplastic theory that the elastoplastic theory is not completely abandoned.
【作者單位】： 常州工學(xué)院常州市建設(shè)工程結(jié)構(gòu)與材料性能研究重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(51479052,51678083,41302226) 江蘇省六大人才高峰項(xiàng)目(JZ-011) 江蘇高校品牌專業(yè)建設(shè)工程一期項(xiàng)目(PPZY2015A041) 湖南科技大學(xué)巖土工程穩(wěn)定控制及健康監(jiān)測(cè)湖南省重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(E21620) 江蘇省高�！扒嗨{(lán)工程”資助 江蘇省高校優(yōu)秀中青年教師和校長(zhǎng)境外研修計(jì)劃資助
【分類號(hào)】：TV223

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