CAJ | 학술논문

Drucker-Prager(下简称D-P)系列屈服准则作为Mohr-Coulomb(下简称M-C)准则的修正模型在岩土工程中得到了广泛的使用.然而采用不同的D-P系列屈服准则可能会得到差距较大的结果,因此,选用合适的D-P系列屈服准则十分重要.在研究了D-P系列屈服准则与M-C准则之间的对应关系之后,指出D-P系列屈服准则对应的Lode角取值较为有限,难以反映出材料在丰富受力状态下的M-C准则屈服强度,将其取值范围扩大至-30°～30°,并以某边坡和向家坝泄12坝段抗滑稳定分析为例,对如何选用合适的D-P系列屈服准则这一问题进行了研究,提出了具体的选择方法.研究结果表明,只要选用的D-P系列屈服准则对应的Lode角能反映影响边坡和坝基稳定的关键部位的受力状态,就能够得到较好的结果,将D-P系列屈服准则对应的Lode角取值范围扩大至-30°～30°也是必要的.
Drucker-Prager(하간칭D-P)계렬굴복준칙작위Mohr-Coulomb(하간칭M-C)준칙적수정모형재암토공정중득도료엄범적사용.연이채용불동적D-P계렬굴복준칙가능회득도차거교대적결과,인차,선용합괄적D-P계렬굴복준칙십분중요.재연구료D-P계렬굴복준칙여M-C준칙지간적대응관계지후,지출D-P계렬굴복준칙대응적Lode각취치교위유한,난이반영출재료재봉부수력상태하적M-C준칙굴복강도,장기취치범위확대지-30°～30°,병이모변파화향가패설12패단항활은정분석위례,대여하선용합괄적D-P계렬굴복준칙저일문제진행료연구,제출료구체적선택방법.연구결과표명,지요선용적D-P계렬굴복준칙대응적Lode각능반영영향변파화패기은정적관건부위적수력상태,취능구득도교호적결과,장D-P계렬굴복준칙대응적Lode각취치범위확대지-30°～30°야시필요적.
The Drucker-Prager yield criteria are widely used in geotechnical engineering as modified models of Mohr-Coulomb criterion. Great differences may be made between results with different Drucker-Prager yield criteria. It is important to select a proper Drucker-Prager yield criterion in geotechnical engineering analysis. The range of Lode angle of Drucker-Prager yield criterion is too limit to reflect more stressed conditions and should be enlarged from -30°to 30°is pointed out. Studies of section how to select a proper Drucker-Prager yield criterion are made based on stability analyses of a certain slope and that of dam #12 foundation of the Xiangjiaba Project. Studies show that more reasonable results can be achieved if the Lode angle of Drucker-Prager yield criterion selected can reflect the stressed condition of important parts which play important roles in maintaining stability of dam foundation or slope; and it is necessary to enlarge the range of Lode angle of Drucker-Prager yield criterion.