CAJ | 학술논문

三维精细化数值模型有助于深入研究盾构隧道管片接头的力学性能，如何准确地将室内试验和数值模型的边界条件相对应是研究中的关键问题之一。在接头抗弯性能的研究中，轴力偏心距的影响不可忽视，以往研究大多对其进行理想化的处理，因此带来较大误差。针对管片接头压碎试验中轴力施加位置的不确定性进行探讨，证明了通过求解线性方程，并根据数值模拟和试验的偏差来确定初始轴力偏心距的可行性和合理性。并模拟出了管片接头在正负弯矩作用下变形至破坏的全过程，最后对正负弯矩作用下管片接头抗弯试验和三维有限元模拟提出建议。
삼유정세화수치모형유조우심입연구순구수도관편접두적역학성능，여하준학지장실내시험화수치모형적변계조건상대응시연구중적관건문제지일。재접두항만성능적연구중，축력편심거적영향불가홀시，이왕연구대다대기진행이상화적처리，인차대래교대오차。침대관편접두압쇄시험중축력시가위치적불학정성진행탐토，증명료통과구해선성방정，병근거수치모의화시험적편차래학정초시축력편심거적가행성화합이성。병모의출료관편접두재정부만구작용하변형지파배적전과정，최후대정부만구작용하관편접두항만시험화삼유유한원모의제출건의。
Three-dimensional accurate numerical model is favorable for the in-deep study on the mechanical performance of segment joints.How to establish the relationship between the boundary conditions of the indoor experiments and those of the numerical models is one of the key factors to success.In the studies on the bending performance of segment joints, the influence of the axial force eccentricity cannot be ignored.In previous studies,idealized treatment is carried out, which resulted in big errors.In the paper,the uncertainty of the positions where the axial force is applied in the segment joint crushing experiment is discussed,the feasibility and rationality to determine the axial force eccentricity in accordance with the deviation between the numerical simulation result and the experiment result and by means of regression analysis is verified,the whole process from the displacement of the segment joints to the failure of the segment joints under the positive and negative bending moments is simulated,and finally some suggestion is made on the bending experiment and three-dimen-sional numerical simulation of segment joints under positive and negative bending moments.