【摘要】 以考虑轴向力与弯矩共同作用的等价刚度非线性动力有限元法 ,分析了地震动作用下盾构法隧道纵向的非线性响应特性。通过与不考虑轴向力与弯矩共同作用的等价刚度法及管片与纵向螺栓单独建模分析等不同方法计算结果的对比 ,验证了等价刚度计算中考虑轴向力与弯矩共同作用的必要性和不考虑轴向力与弯矩共同作用等价刚度法的适用性 ,并就隧道等价刚度、螺栓非线性及地基参数非线性等要素对隧道纵向地震响应的影响情况进行分析。更多还原

【Abstract】 Adopting axial force and bending moment coactions equivalent rigidity method, the longitudinal nonlinear responses of a shield tunnel are analyzed, subjected to various earthquake incidence and soil-structure interaction. The rationality and applicability with considering such coactions or without are demonstrated for ordinary and higher level ground motions. Such influence aspects as equivalent rigidity, soil non-linearity and bolt plasticity are discussed in detail, providing an academic foundation for cognizing the dynamic behaviors of shield tunnel and upgrading its seismic design.更多还原