近年隧道震害频发，强震环境下盾构隧道的宏观动力响应与细观动态演化密切相关，但传统数值模拟和模型试验方法均难以全面反映结构在宏-细观不同尺度下的力学行为，缺乏强震灾变模拟的有效研究手段。本项目交叉融合隧道动力学、地震工程学及多尺度科学等学科，采用理论分析、数值模拟和模型试验相结合的研究方法，系统研究盾构隧道强震灾变的并发多尺度动力分析方法和多尺度模型试验方法。包括推导盾构隧道宏-细观模型纵向刚度等效化理论；建立宏-细观模型相关联的能量函数和约束关系，推导多尺度动力控制方程，引入损伤理论实现并发多尺度数值模拟；建立基于宏-细观模型等效设计的多尺度振动台模型试验方法；通过数值模拟和模型试验交叉验证，揭示强震下盾构隧道的宏观动力响应规律和细观损伤演化机理。项目预期将建立基于损伤指标和能量指标的盾构隧道抗震安全性评价方法。项目研究有助于发展和完善我国隧道抗震理论和方法，为隧道抗震设计提供科学依据。

Tunnel structures are susceptible to receive irrecoverable damage in recent earthquakes. For shield tunnels, macro-scale dynamic response has a strong relationship with meso-scale dynamic evolution under strong earthquakes. However, traditional numerical simulation and model testing methods cannot be used to fully describe the macro-scale and meso-scale dynamic behaviors of shield tunnels, and thus effective research methods are urgently required for dynamic hazard simulation of shield tunnels under strong earthquakes. Based on the multidisciplinary subjects intersected by tunnel dynamics, earthquake engineering and multiscale science, a concurrent numerical multiscale method and a multiscale model testing method, are systematically presented, for shield tunnels subjected to strong earthquakes. Both the theoretical, numerical and testing techniques are used to conduct the research. Main contents of the proposal include: the equivalent theory of longitudinal stiffness of macro-scale and meso-scale models of shield tunnel is derived; energy functions and constrained relations are built up to connect macro-scale and meso-scale models smoothly, and the corresponding multiscale dynamic equations are derived, and the damage theory is introduced to realize the concurrent multiscale numerical simulation; a multiscale shaking table test method for shield tunnels is proposed on the basis of equivalent design of macro-scale and meso-scale models; and via the comparative validation between numerical simulation and model test, both the macro-scale dynamic responses and meso-scale damage mechanisms of shield tunnels under strong earthquakes are fully revealed. Further expected accomplishments include a seismic safety evaluation method for shield tunnels based on the defined damage and energy indexes. The research proposal will be beneficial to develop and improve seismic theories and methods of tunnels, and furthermore will provide scientific basis for seismic design of tunnel structures.