地铁地下结构抗震分析及设计中的几个关键问题

针对我国尚缺少完善的地铁地下结构抗震分析方法和专门的地铁结构抗震设计规范的现状,在分析目前我国地铁等地下结构抗震研究及设计方法的基础上,重点阐述了需要迫切解决的五个关键问题:合理的地下结构动力分析模型,高效的地下结构-地基系统动力相互作用问题分析方法,合理而实用的地铁地下结构地震破坏模式和抗震性能评估方法,地铁地下结构抗震构造措施,地铁区间隧道穿越地震断层的设计方案及工程措施。这些问题的研究和解决将为地铁地下结构抗震设计规范或规程的制定奠定坚实的基础。

Issues on the seismic analysis and design of subway structures

So far,there is still lack of a mature seismic analysis method and design code for underground subway structures in China.On the basis of analyzing the existing seismic research and design methods for subway structures,five key issues need to be seriously considered and urgently resolved in the near future;these are a reasonable dynamic analysis model for underground structure systems,efficient analysis method for dynamic soil-structure interactions,reasonable and practicable assessment method for seismic failure patterns and seismic performance of subway structures,seismic construction measures for subway structures,and finally design schemes and engineering measures for subway tunnels through earthquake faults.