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研究目的:地下大空间构筑物的开发利用成为近年来城市化进程的热点,相关的抗震规范也在近几年陆续出台,但抗震设计的理论和实践水平与地面结构相比还有差距,存在与地下结构建设水平相脱节的情况。本文对上部拟建立交桥的地铁车站工程进行基于时程分析法的抗震性能研究,对描述2种不同站桥相互关系的设计方案进行数值分析并得出结论,期望对地下结构抗震设计的认识与方法的完善提供有益思路。研究结论:(1)各工况下的车站顶板-底板层间位移角均满足相关规范中对结构弹性层间位移角限值的要求;(2)站桥分离方案在满足变形和承载力要求的前提下,更好地节省了工程造价和劳动力成本;(3)采用时程分析法对地下结构进行计算,宜将计算结果与其他抗震分析方法的对应结果进行比对并进行过程修正,对计算结果的评价应以结构的抗震性能及薄弱部位的定性分析为主,并作为结构设计的参考依据;(4)本研究成果对地下工程的抗震分析与结构设计具有参考和借鉴价值。
Research purposes: The development and utilization of large-scale underground structures have become the focus of urbanization in recent years. Relevant seismic codes have also been introduced in recent years. However, there is still a gap between theoretical and practical levels of seismic design and ground structures. Underground structure construction phase out of phase situation. In this paper, based on the time-history analysis method, the seismic performance of metro station project with the overpassed bridge is studied. The numerical analysis of the design scheme describing the relationship between the two different stations and bridges is made and the conclusion is reached. Improve the method to provide useful ideas. The conclusions are as follows: (1) The roof-floor displacement angles under various conditions meet the requirements of the relevant codes for the displacement angle limit of the structure elastic layer; (2) The station-bridge separation scheme meets the requirements of deformation and bearing capacity (3) Calculating the underground structure by using the time history analysis method, comparing the calculated result with the corresponding result of other seismic analysis methods, and correcting the process The evaluation of the calculation results should be based on the seismic performance of the structure and the qualitative analysis of the weak parts, and serve as a reference for structural design. (4) The results of this study have reference and reference value for the seismic analysis and structural design of underground engineering.