首页期刊在线 2022年（第25卷）第8期

明-暗挖地铁车站框架结构接头刚度对抗震性能的影响研究

袁勇1,2蓝旭曌1徐正良3毕湘利4李翀1

Influence of Open-buried Excavation Metro Station Joint Stiffness on Seismic Per-formance

YUAN YongLAN XuzhaoXU ZhenliangBI XiangliLI Chong

作者信息:

1.1.同济大学地下建筑与工程系, 200092，上海；
2.2.同济大学土木工程防灾国家重点实验室, 200092，上海；
3.3.上海市城市建设设计研究总院， 200125，上海；
4.4.上海申通地铁集团有限公司， 201103，上海
Affiliation:

Department of Geotechnical Engineering, Tongji University, 200092, Shanghai, China
关键词:

地铁;车站;组合工法;结构抗震;振动台
Key words:

metro;station;combined excavation;structure seismic resistance;shaking table
DOI:

10.16037/j.1007-869x.2022.08.039
中图分类号/CLCN:

U442.5+5∶U231.4
栏目/Col:

其他

摘要:

上海轨道交通14号线静安寺站位于城市核心区，受限于周边运营设施与建筑保护需求，采用顶管结构衔接两侧明挖法框架结构式车站。该复合工法建设的车站结构存在刚度差异大，衔接方式对地震效应的影响未知等技术难题。为此开展了几何比尺1/20的结构振动台试验，研究该车站的抗震性能。试验结果表明：车站顶管与框架结构之间采用柔性连接时，地震波沿车站横向输入时顶管加速度峰值比纵向输入时大，框架结构质量较大的一端顶管加速度峰值较大；采用刚性连接时环缝张开量整体大于采用柔性连接的工况。已有理论分析较适用于柔性连接工况，当最大环缝张开量较小时，试验值相对理论值偏小。

Abstracts:

Jing′an Temple Station of Shanghai Metro Line 14 is located in urban core area. Due to the restriction of surrounding operating facilities and the demand for building protection, the station adopts a combined structure in which the pipe-jacking structures are connected to the cut-and-cover frame structures on both sides. However, the station structure constructed by the combined excavation method has technical problems such as large differences in stiffness and unknown seismic effects. Therefore, a shaking table test with a geometric scale of 1/20 is carried out to investigate the seismic performance of the station structure. Using the flexible connection, the peak accelerations of pipe-jacking structures when the seismic wave is input along the transverse direction of the station are larger than those along the longitudinal direction. The peak accelerations of pipe-jacking at the end with the larger mass is larger. Using rigid connection, the overall circumferential-joint extensions is larger than that of the flexible connection. The theoretical analysis is more suitable for flexible connection conditions. When the maximum circumferential-joint extension is small, the experimental value is smaller than the theoretical value.