Compared with the condition of the two - dimensional stress state , the influence of all the parameters to the results of the formulas of the critical edge load and critical load in the condition of the three - dimensional stress state is analyzed in the end of this paper 并通過(guò)實(shí)際的算例詳細(xì)的分析了臨塑荷載、臨界荷載中各個(gè)參數(shù)在二維應(yīng)力狀態(tài)下和三維應(yīng)力狀態(tài)下對(duì)計(jì)算結(jié)果進(jìn)行了影響程度分析。
The formulas of the critical edge load and critical load are expanded from the two - dimensional stress state to the three - dimensional stress state by using smp ( matsuoka - nakai ) strength criterion to substitute for mohr - coulomb strength criterion , and the new formulas are proposed in chapter three 本文將臨塑荷載、臨界荷載計(jì)算公式擴(kuò)展到三維應(yīng)力狀態(tài),應(yīng)用smp (松崗?中井)強(qiáng)度準(zhǔn)則替代莫爾?庫(kù)侖強(qiáng)度準(zhǔn)則,推導(dǎo)了三維應(yīng)力狀態(tài)下的臨塑荷載、臨界荷載計(jì)算公式。
The programme can solve two - dimensional stresses , strains and axial symmetry problems with different yield criteria . a satisfying solution has been put forward to the contact boundary between reinforcements and soil . the special problem of two contact plane elements at the joint between plate and strip has been solved 該程序能同時(shí)考慮平面應(yīng)力、平面應(yīng)變和軸對(duì)稱問(wèn)題,并能運(yùn)用不同的屈服準(zhǔn)則,使其更具有通用性和適用性,成功地解決了筋材與土介質(zhì)界面的接觸問(wèn)題,較好地解決了墻面板與筋帶連接處出現(xiàn)兩個(gè)接觸面單元的特殊問(wèn)題。
The formulas of the critical edge load and the critical load are wildly used in the definition of the bearing capacity in practice . for the ignorance of the middle principal stress , the results of the formulas of the critical edge load and critical load which are based on the mohr - coulomb strength criterion in the two - dimensional stress state tend to be conservative 臨塑荷載、臨界荷載計(jì)算公式一直是工程實(shí)際中計(jì)算地基承載力的理論基礎(chǔ),但是基于二維應(yīng)力狀態(tài)下莫爾?庫(kù)侖強(qiáng)度準(zhǔn)則的臨塑荷載、臨界荷載公式因?yàn)闆](méi)有考慮到中主應(yīng)力在強(qiáng)度上的有利作用而使計(jì)算結(jié)果偏于保守。
The rankine soil pressure theory is always accepted as the foundation of calculations of the soil pressure in practice . but as we know , the ignorance of the middle principal stress and the utility of mohr - coulomb strength criterion in the two - dimensional stress state make a blemish that the active soil pressure is bigger and the passive soil pressure is litter than the real 朗肯土壓力計(jì)算公式一直是工程實(shí)際土壓力計(jì)算的理論基礎(chǔ),但是朗肯土壓力計(jì)算公式在推導(dǎo)過(guò)程中忽略了中主應(yīng)力的影響,仍然應(yīng)用二維應(yīng)力狀態(tài)下的莫爾?庫(kù)侖強(qiáng)度準(zhǔn)則,致使計(jì)算出的主動(dòng)土壓力偏大而被動(dòng)土壓力偏小。