| 阪神地震中大开地铁车站和区间隧道破坏差异成因研究? |
| |
| 引用本文： | 李洋,许成顺,杜修力.阪神地震中大开地铁车站和区间隧道破坏差异成因研究?[J].防灾减灾工程学报,2020(3):326-336. |
| |
| 作者姓名： | 李洋 许成顺 杜修力 |
| |
| 作者单位： | 中国铁道科学研究院集团公司城市轨道交通中心，北京 100081;北京工业大学城市与工程安全减灾教育部重点实验室，北京 100124 |
| |
| 基金项目： | 国家自然科学基金创新研究群体项目(51421005)、国家自然科学基金优青项目（51722801）、国家自然科学基金青年科学基金项目（5190082782）、铁科院（北京）工程咨询有限公司科研项目（2019ZXJ004）资助 |
| |
| 摘 要： | 在日本阪神地震中遭受地震破坏的地铁地下结构中,仅大开车站中标准段一处区域发生了完全塌毁,其它地铁车站、隧道的震害程度均相对其要轻微。利用能够合理模拟地下框架结构损伤破坏的数值分析模型,对大开车站标准段、中央大厅段以及区间隧道结构的地震破坏反应进行了数值模拟分析,探讨了造成上述现象的原因。结果表明:不同断面宽度以及埋深导致大开车站标准段、中央大厅段以及区间隧道结构所受的上覆土压不同,使三者立柱在地震作用中处于不同的轴压比状态下工作,并使得三者不同刚度的结构框架在地震作用中出现不同程度的损伤与刚度退化,继而导致三者立柱出现了不同程度的水平相对变形。最终大开站标准段立柱由于较高的轴压比下受到过量的水平相对变形而发生破坏,从而导致整体框架结构的严重破坏;其余二者则由于立柱处于较低的轴压比下,所受水平相对变形处于立柱变形能力范围内,而未发生立柱破坏,进而使得整体框架保持了承载能力。
|
| 关 键 词： | 阪神地震 大开地铁车站 区间隧道 轴压比 侧向变形刚度 |
Causal Analyses of Different Degree of Earthquake Damage Occurred on Daikai Subway Station and its Running Tunnels During Kobe Earthquake |
| |
| LI Yang,XU Chengshun,DU Xiuli.Causal Analyses of Different Degree of Earthquake Damage Occurred on Daikai Subway Station and its Running Tunnels During Kobe Earthquake[J].Journal of Disaster Prevent and Mitigation Eng,2020(3):326-336. |
| |
| Authors: | LI Yang XU Chengshun DU Xiuli |
| |
| Affiliation: | Urban Rail Transit Center, China Academy of Railway Sciences Corporation Limited, Beijing 100081 , China;Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124 , China |
| |
| Abstract: | During the Kobe earthquake in Japan, different degrees of earthquake damage occurred on the subway underground structures. Only one zone of the standard section of Daikai station totally collapsed, while the other zones of Daikai station, its running tunnels and other subway underground structures did not have serious earthquake damage. In this paper, the earthquake damage responses of the standard section, central hall and running tunnel structure of Daikai station were analyzed based on nonlinear finite element analyses which can reasonably simulate the damage of underground structures. Numerical results indicate that different width of structural cross section and burial depth lead to different overlying earth pressure on the structures at the standard section, central hall section and running tunnel section. The different overlying earth pressure generated different axial compression ratio of the three structural columns. In addition, the three structures with different lateral racking stiffness had different degree of damage and stiffness degradation, and further led to different lateral racking deformation. Eventually, the columns of Daikai station standard section destroyed due to the excessive relative deformation under the high axial compression ratio, which caused the total collapse damage to the entire frame structure. On the contrary, the columns of central hall and running tunnel section have not destroyed because there were not excessive relative deformation under the lower axial compression ratio, which kept the bearing capacity of the entire frame structure. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《防灾减灾工程学报》浏览原始摘要信息 |
|
点击此处可从《防灾减灾工程学报》下载全文 |
|
