不同位置火源引起圆形综合管廊结构损伤特性研究
Study on the structure damage characteristics of circular utility tunnel caused by fire at different locations
郑铭钧 1叶建国 2夏栋 2叶立 2丁智 3董毓庆4
作者信息
- 1. 宁波城建投资集团有限公司,浙江宁波 315199
- 2. 宁波市基础设施运营管理有限公司,浙江宁波 315199
- 3. 浙江大学城市学院,浙江杭州 310015
- 4. 杭州岩通科技有限责任公司,浙江杭州 310005
- 折叠
摘要
综合管廊在运营过程中,电力管线及燃气管线容易引起火灾,不仅会产生重大经济损失,还会影响管廊服役性能与临近轨道交通等公共设施的平稳运行.为探究不同位置火源对综合管廊结构的影响,文章构建圆形综合管廊温度-应力耦合三维有限元模型,分析不同位置火源作用下综合管廊的变形规律及结构损伤,结果表明:随着火源高度的增加,火源上方综合管廊结构变形增大,下方变形减小;火源到拱顶范围内火源处的压应力随火源高度增加而减小,而其余各处压应力增大;圆形管廊结构环向损伤区的范围为火源上方约10°;当管廊直径为 6 m左右时,建议电缆管线及燃气管线布置在3～4 m的高度范围内.
Abstract
During the operation of the utility tunnel,power and gas pipelines are prone to fires,which not only cause significant economic losses,but also affect the service performance of the pipeline corridor and impact the regular operation of nearby public facilities such as rail transit.To investigate the influence of different fire locations on the structure of a utility tunnel,this article constructs a 3D-finite element model of temperature stress coupling for a circular utility tunnel.The deformation law and structure damage of the utility tunnel under the action of fire at different locations are analyzed.The results show that as the height of the fire position increases,the deformation of the utility tunnel structure above the fire source increases and the deformation decreases below;The compressive stress at the fire position within the range from the fire to the arch crown decreases with increasing height of the fire position,while the compressive stress increases at other locations;The range of the circumferential damage zone of the circular pipeline corridor structure is about 10 ° above the fire;When the diameter of the pipeline corridor is about 6 meters,it is recommended to arrange cable and gas pipelines within a height range of 3-4 meters.
关键词
轨道交通/综合管廊/火源位置/温度-应力耦合/结构损伤Key words
rail transit/utility tunnel/fire location/temperature stress coupling/structure damage引用本文复制引用
出版年
2024
NETL
NSTL
万方数据