【摘要】 为探究波纹板加固对盾构隧道管片纵缝力学性能的影响机理，建立考虑波纹板接头的波纹板加固管片纵缝三维精细化有限元模型。通过足尺试验结果验证数值模型的合理性，并分析波纹板加固对管片纵缝抗弯刚度和承载能力的增强效果，同时探讨轴力、加固时机及波纹板接头形式对波纹板加固管片纵缝力学性能的影响。结果表明：所建立的数值模型能够较好地模拟波纹板加固管片纵缝试件在压弯荷载作用下的非线性力学行为，计算结果与试验结果吻合良好，具有较高的计算精度。在负弯矩作用下，波纹板加固后极限弯矩提高29.4%，弹塑性阶段和极限破坏阶段的抗弯刚度分别提高101.8%和40.5%。采用双排锚栓接头形式时，结构极限弯矩与纯波纹板仅相差2.6%，较单排锚栓提高31.1%。建议优先采用双排锚栓接头形式，以避免波纹板与管片之间的连接破坏。更多还原

【Abstract】 To clarify the strengthening mechanism of corrugated plates on the mechanical behavior of longitudinal segmental joints in shield tunnels, a refined three-dimensional finite element model incorporating corrugated plate joints was established. The numerical model was validated using full-scale test results. The enhancement effects of corrugated plate reinforcement on the bending stiffness and ultimate bearing capacity of segmental joints were investigated. Moreover, the influence of axial force, reinforcement timing, and corrugated plate joint configuration on the mechanical performance of reinforced joints was examined. The results indicate that the proposed numerical model can accurately simulate the nonlinear mechanical behavior of corrugated-plate-reinforced longitudinal joints subjected to combined compression and bending, demonstrating good agreement with experimental observations. Under negative bending moments, corrugated plate reinforcement increases the ultimate bending capacity by 29.4%, while the bending stiffness in the elastic-plastic stage and at ultimate failure is enhanced by 101.8% and 40.5%, respectively. When a double-row bolt connection is adopted, the ultimate bending capacity is only 2.6% lower than that of fully welded corrugated plates, and is 31.1% higher than that of a single-row bolt connection. It is therefore recommended to prioritize the double-row bolt configuration to prevent failure at the corrugated plate-segment interface.更多还原