从西安地铁l#线工程背景和西安地裂缝地质环境出发,根据相似理论设计了盾构隧道管片衬砌结构30°斜穿地裂缝的物理模型试验。管片混凝土应变、纵向和环向螺栓应变、结构接触土压力外围土压力、结构内部收敛位移、模型顶表面土体变形以及宏观变形破坏现象表明:盾构隧道管片衬砌结构30°斜穿地裂缝的变形破坏模式为剪切变形为主,局部有扭转变形;结构破坏范围为上盘1.25D,下盘0.75D(D为管片环外径);管片衬砌结构变形破坏不对称,管片环向处于偏压状态;环缝拱底位错量大于拱顶和拱腰,拱底最大位错量达40mm(0.033D),模型难以适用地裂缝错动变形20cm(0.1667D),盾构管片衬砌结构不适用于地裂缝活动强烈的地质环境。
Based on elastic theory, interface slip equations of corroded bttC beam were estaDnsneu ana solved. In different loads, the distribution characteristics of bond-slip were discussed between steel flanges and around concrete in long direction along beam. Durability test results of steel reinforced concrete beams shows that the result is the same with SRC beams corroded interface slip. It' s verified the correctness of the theoretical study, and the study laid a foundation for bond-slip relation of the corroded SRC beam.