摘要
针对地下管廊抗震的问题,以郑州市耿河变电站到博文变电站之间的三心拱断面地下管廊为研究对象,利用ANSYS Workbench软件建立三维实体模型,对其进行前6阶的模态分析,发现该管廊存在纵向振动、竖向振动、横向振动以及转动。基于模态分析,对管廊在水平地震和竖向地震作用下的位移响应、加速度响应和主应力响应进行分析。结果表明:最大的水平和竖向位移峰值分别为-24.222 mm和-8.954 mm;最大加速度峰值分别为3354.2 mm/s^(2)和1646.0 mm/s^(2);第一主应力峰值分别为514.7 kPa和244.15 kPa;第三主应力峰值分别为-608.15 kPa和-256.71 kPa,可得出水平地震占主导作用。对管廊的横向地震动力时程进行分析,改变频谱特性、结构材料强度、结构埋深等参数,分析其对管廊抗震性能的影响。得到研究的管廊结构在地震波频谱特性约为1.1 Hz时最为敏感;混凝土强度的改变对管廊结构的动力响应影响不大;随管廊埋设深度的增加,周边土压力加大,使其内力逐步上升。
Aiming at the seismic problem of underground utility tunnel,the three-core arch section underground utility tunnel between Genghe Substation and Bowen Substation in Zhengzhou City was taken as the research object,ANSYS Workbench software was used to establish a three-dimensional solid model,and carries out the first 6 order modal analysis.It was found that the utility tunnel had longitudinal vibration,vertical vibration,lateral vibration and rotation.Based on the modal analysis,the displacement response,acceleration response and principal stress response of the utility tunnel with horizontal and vertical earthquakes were analyzed.The results showed that the maximum horizontal and vertical displacement peaks were -24.222 mm and -8.954 mm,respectively.The maximum acceleration peaks were 3354.2 mm/s^(2) and 1646.0 mm/s^(2),respectively.The peak values of the first principal stress were 514.7 kPa and 244.15 kPa,respectively.The peak values of the third principal stress were -608.15 kPa and -256.71 kPa,respectively.It could be concluded that the horizontal earthquake played a leading role.Based on the transverse seismic dynamic time history analysis of the utility tunnel,the parameters such as spectral characteristics,structural material strength and structural depth were changed to analyze their influence on the seismic performance of the utility tunnel.The utility tunnel structure studied was the most sensitive when the seismic wave spectrum characteristic was about 1.1 Hz;the change of concrete strength had little effect on the dynamic response of the pipe gallery structure.With the increase of the buried depth of the utility tunnel,the surrounding soil pressure increased,and the internal force gradually increased.
作者
胡鹏辉
盛桂琳
杜文风
金岭
HU Penghui;SHENG Guilin;DU Wenfeng;JIN Ling(School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,China;China Construction Fifth Engineering Division Co.,Ltd.,Changsha 410004,China;Henan AOONE Architectural Technology co.,Ltd.,Zhengzhou 450000,China)
出处
《郑州大学学报（工学版）》
CAS
北大核心
2024年第5期135-142,共8页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(U1704141)
河南省高校科技创新团队支持计划项目(22IRTSTHN019)
河南省科技攻关计划项目(212102310274)。
关键词
三心拱断面
地下管廊
地震响应
影响因素
three-center arch section
underground pipe gallery
seismic response
influencing factors
