CAJ | 학술논문

基于传统的模量软化法和双曲线弹性本构模型建立永久变形随时间变化的表达式。通过与动三轴试验结果对比发现，此类方法在应用于循环荷载下易液化的粉砂的永久变形计算时，具有明显的局限性。因此，结合粉砂容易液化而产生流变的特性，在力的平衡方程中引入流变项。通过分析力的平衡方程，发现引入流变项后能够更好地描述土体破坏前后的永久变形发展规律。同时，得出了方程中相关参数的计算方法，并将数值计算结果与试验结果进行比较，发现两者吻合度较高。研究为循环荷载作用下粉砂的永久剪切变形计算提供了一种新思路。
기우전통적모량연화법화쌍곡선탄성본구모형건립영구변형수시간변화적표체식。통과여동삼축시험결과대비발현，차류방법재응용우순배하재하역액화적분사적영구변형계산시，구유명현적국한성。인차，결합분사용역액화이산생류변적특성，재력적평형방정중인입류변항。통과분석력적평형방정，발현인입류변항후능구경호지묘술토체파배전후적영구변형발전규률。동시，득출료방정중상관삼수적계산방법，병장수치계산결과여시험결과진행비교，발현량자문합도교고。연구위순배하재작용하분사적영구전절변형계산제공료일충신사로。
Based on the viewpoint of traditional modulus softening method and hyperbolic constitutive model,a formula of permanent deformation changing with time was established. Compared with results of dynamic triaxial test,it was found that the formula was impossibly used for the silty sand which was easily liquefied. On this basis,a rheological term was introduced into the stress equilibrium equation,by which the character of silty sand permanent deformation could be described properly. At the meantime,the way of calculating related parameters in the equations was also introduced. Plugging these parameters into the equilibrium equation,it showed that the numerical calculating results were highly identical with the test results. Although some problems needing for further studies,a new idea in studying the permanent strain was provided.