摘要
为研究地震动荷载对大跨度浅埋明挖装配式结构受力性能产生的影响,本文以中山地下综合管廊项目为背景,借助有限元软件ABAQUS建立土体-管廊结构三维实体模型,通过调整埋深和加速度峰值(0.1 g、0.2g、0.3g),模拟装配式管廊结构受力和变形影响。研究结果表明:(1)在相同地震波荷载下,装配式结构相较于现浇结构最大主应力增加33.75%,最小主应力提升12.63%;(2)现浇结构侧墙-中墙的相对位移波动较小,而装配结构波动范围则较大;(3)结构受力最不利位置主要位于大跨度底板受拉侧和顶板与中隔墙相交的腋角处,在设计和维修加固过程中应当重点关注。本文研究成果可为类似大跨度浅埋明挖装配式管廊结构设计提供参考。
In order to study the influence of seismic dynamic load on the mechanical property of large-span shallow buried and open-cut prefabricated structures,the Zhongshan underground utility tunnel project is taken as the background,a three-dimensional solid model of the soil-utility tunnel structure is established with the help of finite element software ABAQUS,and the influence of force and deformation of the prefabricated utility tunnel structure is simulated by adjusting the buried depth and acceleration peak(0.1 g,0.2g,0.3g).The results show that:(1)Compared with the cast-in-situ structure,the maximum principal stress of the prefabricated structure increases by 33.75%and the minimum principal stress increases by 12.63%compared with the cast-in-situ structure under the same seismic wave load;(2)the relative displacement fluctuation of the side wall and the middle wall of the cast-in-situ structure is smaller,while the fluctuation range of the prefabricated structure is larger;(3)the most unfavorable position of the structural stress is mainly located at the axillary angle where the tension side of the long-span bottom plate and the roof and the middle partition wall intersect,which should be focused on in the process of design and maintenance reinforcement.The results can provide references for similar structural design of large-span shallow buried and open-cut prefabricated utility tunnel.
作者
张秋实
陈柏全
ZHANG Qiushi;CHEN Baiquan(China Nineteen Metallurgical Group Co.,Ltd.,Chengdu 610200,Sichuan,China)
出处
《工程建设》
2024年第1期34-39,共6页
Engineering Construction
关键词
装配式综合管廊
浅埋明挖结构
地震动力响应
数值分析
prefabricated utility tunnel
shallow buried and open-cut structure
seismic dynamic response
numerical analysis
