CAJ | 학술논문

为了深入分析Duncan模型推广的关键所在,通过平面应变这一常见情况,从理论和数值两方面考证三点修正以及在原Duncan模型基础上引入方开泽强度准则对土体的应力变形计算的影响,最后针对某一理想坝进行三维有限元分析.结果表明:前两点修正不足以弥补中主应力对切线弹模的影响,而第三点修正使弹模整体值减小;在Duncan模型中引入方开泽强度准则,能够较好体现中主应力对土体应力变形的影响.
위료심입분석Duncan모형추엄적관건소재,통과평면응변저일상견정황,종이론화수치량방면고증삼점수정이급재원Duncan모형기출상인입방개택강도준칙대토체적응력변형계산적영향,최후침대모일이상패진행삼유유한원분석.결과표명:전량점수정불족이미보중주응력대절선탄모적영향,이제삼점수정사탄모정체치감소;재Duncan모형중인입방개택강도준칙,능구교호체현중주응력대토체응력변형적영향.
@@@@In order to find the key point of promoting Duncan models ,the theoretical and numerical methods are used here to study the applicability of three advices raised by Guganchen et al from the aspects such as modifying elastic mod-ules ,Poisson’s ratio and strength criterion in 1991 and FKZ criterion introduced on Duncan models in plan strain ques-tion ,then the 3D finite element method is applied to the structural simulation of an ideal dam .The results indicate that the front two advices cannot make up the effects of intermediate principal stress on tangent elastic modulus sufficiently , the last advice can make the value of elastic modulus smaller than that in Duncan model itself ,and FKZ criterion can re-flect the effects of intermediate principal stress well in stress and deformation behaviors .