中文摘要：

针对盾构隧道块体间由于拼装咬合引起局部结构刚度分布不均匀,从而导致结构受力与变形不同于均质连续管状结构体的现象,采用自主研发的局部原型结构加载试验系统装置,分别选取盾构隧道管片衬砌结构中的原型单体管片与考虑前后环错缝拼装组合的原型管片衬砌局部构件进行加载试验,对比分析了其受力特征的差异,并探讨了不同轴压比、偏心距以及螺栓初始预紧力下管片结构受拼装效应的影响规律。研究结果表明：单体管片工况下,结构受两侧支座的影响较大,沿结构环向其内力、变形分布均极不均匀,沿幅宽方向,内力呈对称分布,中部大、两侧小,竖向位移基本保持不变;考虑前后环错缝拼装组合工况下,结构受两侧支座的影响较小,沿结构环向,其内力、变形对称分布,较单体管片更为均匀,沿幅宽方向,内力、变形的变化规律与单体管片基本一致;偏心距对结构弯矩的影响大于轴力,不同偏心距下,轴力调整系数α在-0.04-0.02之间,弯矩调整系数β在0.17~48之间;螺栓初始预紧力仅对构件纵缝截面的轴力影响较大,对α和β的影响较小;拼装效应能显著降低结构受两侧支座的影响,对管片的受力变形起到较为明显的传递和重分配作用,使其对称均匀化。

英文摘要：

In allusion to the phenomenon that internal force and deformation of structure were different from those of the homogeneous and continuous tubular structure resulting from uneven distribution of the local structural stiffness of the shield tunnel caused by assembling and occlusion of segments,prototype loading tests were carried out on the single segment and local staggered assembling structure of segmental lining in the shield tunnel by using self-developed＂local prototype loading test system＂.By comparing differences of mechanical characteristics,theinfluence of assembling effect on segment structure was investigated under different axial compression ratio,eccentricity and pre-tightening force of bolts.The results show that under the single segment condition,the structure is greatly affected by both sides of the support.The distribution of internal force and deformation is extremely uneven along the circumferential direction.Along the width direction,the internal force is distributed symmetrically and the internal force of middle part is larger than that of both sides of the support,with vertical displacement keeping basically the same.Under the condition of local staggered assembling structure,the structure is slightly affected by both sides of the support and the internal force and deformation are more evenly distributed than the single segment along the circumferential direction.The change laws of the structural internal force and deformation are basically consistent with ones of the single segment along the width direction.The eccentricity has a greater impact on bending moment than axial force.The adjustment coefficient of axial forceαis between-0.04-0.02 and the adjustment coefficient of bending momentβis between 0.17-48 under different eccentricity ratios.Bolt pre-tightening force has a significant impact on axial force at the structural longitudinal seam,but with slight impact onα andβ.It is evident that assembling effect can significantly lower the impact of supports on the structure and guide