CAJ | 학술논문

随着土木水利行业的蓬勃发展，出现越来越多岩土-结构相互作用的问题。虽然目前国内外学者研究出很多种类的接触面本构模型，但大多软件中的接触面模型甚为简单，如此便限制了软件对接触面问题的模拟。FLAC3D软件中的interface单元是简单的库伦滑移型无厚度接触单元，不能模拟接触面所能表现出的例如应变软化等特性。鉴此，基于塑性力学，首先提出了一种弹塑性本构模型。然后基于VC＋＋语言，将此模型开发成适用于FLAC3 D软件的薄层实体单元。最后用三个数值算例验证了所开发的单元和本构模型能反映接触面在弹性阶段的非线性，在塑性阶段的应变软化、大变形、法向剪胀及拉伸破坏等特性。用所开发的新单元代替原有的interface单元能提高FLAC3D模拟复杂接触特性的能力。
수착토목수리행업적봉발발전，출현월래월다암토-결구상호작용적문제。수연목전국내외학자연구출흔다충류적접촉면본구모형，단대다연건중적접촉면모형심위간단，여차편한제료연건대접촉면문제적모의。FLAC3D연건중적interface단원시간단적고륜활이형무후도접촉단원，불능모의접촉면소능표현출적례여응변연화등특성。감차，기우소성역학，수선제출료일충탄소성본구모형。연후기우VC＋＋어언，장차모형개발성괄용우FLAC3 D연건적박층실체단원。최후용삼개수치산례험증료소개발적단원화본구모형능반영접촉면재탄성계단적비선성，재소성계단적응변연화、대변형、법향전창급랍신파배등특성。용소개발적신단원대체원유적interface단원능제고FLAC3D모의복잡접촉특성적능력。
With the vigorous development of civil engineering and hydraulic engineering ,there have been more and more problems about soil-structure interaction .Although there are many interface constitutive models brought up by scholars from home and abroad ,most of them are too simple to fulfill the task of simultating interface problems . Interfaces in FLAC3D are zero-thickness contact elements characterized by Coulomb sliding ,which cannot simulate such behaviors as strain-softening .Therefore ,based on the theory of plasticity ,an elasto-plastic constitutive model for soil-structure inter-action interface was proposed firstly .Then ,the constitutive model was implemented by developing a thin-layer solid ele-ment on the software platform FLAC3D using VC+ + language .Finally ,three numerical examples were presented in de-tail to confirm the validity of the proposed model and the thin-layer element in describing nonlinear behaviors in the elas-tic range ,strain-softening ,large deformation and dilatancy behaviors in the shear direction ,as well as tensile failure in the normal direction during the plastic range .Using the new thin-layer element instead of the original interface element can improve the ability of simulating more complicated interface problems of FLAC3D .