CAJ | 학술논문

基于损伤力学、岩体力学及有限元分析方法,编制损伤附加位移有限元计算程序,选取一组倾向为NW45°的随机裂隙,讨论不同倾角、密度（损伤因子）及充填情况（拉剪、压剪应力传递系数）等对节理岩体隧道损伤影响。分析表明：隧道拱顶（底板）损伤附加位移绝对值随损伤因子的增大而增加,并成非线性关系;当倾角为0°和90°时,隧道的损伤影响与拉剪应力传递系数无关;相同倾角的随机裂隙对底板和拱顶关键点的损伤影响基本是相反的;倾角越小对拱顶下沉和底板隆起的损伤影响越大。拉剪应力传递系数对隧道损伤影响比压剪应力传递系数大;拉剪应力传递系数的变化对隧道损伤影响比压剪应力传递系数变化的影响小。
기우손상역학、암체역학급유한원분석방법,편제손상부가위이유한원계산정서,선취일조경향위NW45°적수궤렬극,토론불동경각、밀도（손상인자）급충전정황（랍전、압전응력전체계수）등대절리암체수도손상영향。분석표명：수도공정（저판）손상부가위이절대치수손상인자적증대이증가,병성비선성관계;당경각위0°화90°시,수도적손상영향여랍전응력전체계수무관;상동경각적수궤렬극대저판화공정관건점적손상영향기본시상반적;경각월소대공정하침화저판륭기적손상영향월대。랍전응력전체계수대수도손상영향비압전응력전체계수대;랍전응력전체계수적변화대수도손상영향비압전응력전체계수변화적영향소。
Finite element program for damage additional displacement is worked out on basis of damage mechanics,rock mechanics and finite element analysis methods.A group of stochastic fractures with NW45° dip are selected so as to analyze the damage of different dip angles,densities（damage factors） and filling conditions（transfer coefficients of tensive and compressive shear stress） on the surround rock mass of tunnels.The study shows that： 1） The absolute value of damage additional displacement of tunnel crown（floor slab） increases as the damage coefficient increases and the relationship between them is nolinear.2） The damage influence of tunnels has nothing to do with the transfer coefficients of tensive and compressive shear stress when the dip angle is 0° and 90°.3） The damage influence on the key points of tunnel crown and floor slab imposed by stochastic fractures with the same dip angle is almost opposite.4） The damage influence on the crown settlement and the floor slab heave increases as the dip angle decreases.5） The damage influence on the tunnel caused by the tensive shear stress transfer coefficient is larger than that caused by the compressive shear stress transfer coefficient.6） The damage influence on the tunnel caused by the variation of the tensive shear stress transfer coefficient is less than that caused by the compressive shear transfer coefficient.