盾构隧道实用抗震计算方法研究

首先分析了各国盾构隧道抗震计算的现状,总结了常用的盾构隧道抗震计算方法,分析了这些方法的优缺点及适用性。在此基础上介绍了在盾构隧道抗震分析方法方面笔者带领的研究团队近年来取得的部分进展,主要有:在盾构隧道横向抗震计算中提出修正静力法,解决了静力法的计算合理性问题;提出考虑环间接头非线性刚度的纵向迭代计算方法,进一步发展了纵向广义反应位移法的适用性,以期解决大型复杂结构在非均匀地层中的高精度计算问题;并介绍了上述研究进展在中国相关抗震规范中的采纳应用情况。最后对隧道实用抗震计算方法进行了展望:在管片结构劣化对盾构隧道抗震的影响、拟静力计算方法如何考虑地层非线性、近场地震动对隧道的影响等方面有待进一步研究。

Research on Practical Seismic Analysis Methods of Shield Tunnel

First of all, this paper investigates the existing seismic analysis methods of shield tunnels in various countries and summarizes the common seismic analysis methods of shield tunnels. Then the advantages and disadvantages and the applicability of the analysis methods of shield tunnels are discussed. Based on these, this paper focuses on a series of research carried out by the authors' team on the seismic analysis methods of shield tunnels and the related progress achieved. The main progress is as follows:The revised transverse static method is proposed, which solves the problem of the calculation rationality of the static method. An iterative algorithm considering the nonlinear longitudinal stiffness of the ring joints is proposed, and the applicability of the longitudinal generalized response displacement method is further developed, which makes it possible to solve large-scale complex structures in non-uniform strata with good accuracy. Then, this paper also introduces the application of the above research results in Chinese seismic codes. Finally, the research on practical methods for the seismic design of shield tunnel is prospected:further research is needed in the aspects of the influence of the deterioration of segment on shield tunnel, quasi-static calculation method considering stratum nonlinearity and the influence of near-field seismic ground motion characteristics on shield tunnel.