CAJ | 학술논문

以地处软硬相间地基中的地铁隧道为研究对象，采用地震动力仿真模拟方法，建立了能同时考虑多点激励、土-结构动力相互作用的地基-隧道的整体计算模型，系统分析了地震 P 波斜入射作用下穿越软硬相间地基中地铁隧道的动力响应规律。结果表明：地震波的入射角度对隧道的响应影响较大，传统的考虑地震波垂直入射的输入方法显现出一定的不安全性；软土区宽度的增加导致隧道的动力响应有明显的加强，对结构抗震不利；隧道衬砌混凝土等级的提高将使隧道结构的位移及加速度有所减小，但是弯矩增大明显，因此通过增大衬砌混凝土的等级提高隧道结构的抗震性效果并不好，反而使衬砌结构的受力变大。
이지처연경상간지기중적지철수도위연구대상，채용지진동력방진모의방법，건립료능동시고필다점격려、토-결구동력상호작용적지기-수도적정체계산모형，계통분석료지진 P 파사입사작용하천월연경상간지기중지철수도적동력향응규률。결과표명：지진파적입사각도대수도적향응영향교대，전통적고필지진파수직입사적수입방법현현출일정적불안전성；연토구관도적증가도치수도적동력향응유명현적가강，대결구항진불리；수도츤체혼응토등급적제고장사수도결구적위이급가속도유소감소，단시만구증대명현，인차통과증대츤체혼응토적등급제고수도결구적항진성효과병불호，반이사츤체결구적수력변대。
The subway tunnel in a site interbedded with soft and hard soil was evaluated in this study by using seismic response simulation.A three-dimensional finite element model of subway tunnel and the site interbedded by soft and hard soil under oblique incidence of P wave was created,in which the soil-structure dynamic interaction and multi-point excitation were simultaneously considered.And the dynamic response of the subway tunnel were calculated and systematically analyzed.The results showed that seismic wave incident angle has a significant effect on the dynamic response of the subway tunnel.The traditional vertical incident seismic wave input method showed a certain degree of insecurity.In addition,the dynamic response of the subway tunnel was constantly increasing with the increasing soft soil district.Thus,the soft soil district is unfavorable to seismic loading.The in-crease of tunnel lining concrete strength grade led to reduction of displacement and acceleration of the tunnel structure and the sig-nificant increase of moment.Therefore,the increase of tunnel lining concrete strength grade has no significant effect on the im-provement of the seismic resistance level of subway tunnel whereas it will increase the internal force of the lining structure.