摘要
本文为研究预制地下管廊内非连续管道的横向抗震性能,采用实体单元模拟混凝土管廊和廊内管道支墩,桁架单元模拟预制混凝土管廊配筋,壳单元模拟管道和支墩抱箍,非线性弹簧模拟管廊预应力企口接头和管道承插口接头,非线性土弹簧模拟土-管廊相互作用,考虑混凝土塑性损伤,基于ABAQUS软件建立土-管廊-管道系统模型。求解土-管廊-管道系统的自振频率和模态,计算在设计地震作用下管廊内管道的内力和变形。研究表明,管道和管廊自振特性存在明显差异,管道和管廊之间存在明显相互作用,支墩抱箍对管廊内管道受力影响不可忽视,开展管廊内管道的抗震分析需要对土-管廊-管道整体系统建模分析。研究对于预制地下管廊内非连续管道的横向抗震设计具有一定参考价值。
In this paper,the lateral seismic analysis of discontinuous pipes in underground precast utility tunnel was studied.The solid element was used to simulate the concrete tunnel and the pipe piers,the truss element was used to simulate the reinforcement of the concrete tunnel,the shell element was used to simulate the pipe and pier hoops,the nonlinear spring was used to simulate the prestressed tongue joints of the tunnel and socket joints of the pipe,the nonlinear soil spring was used to simulate the soil-tunnel interaction,and the soil-tunnel-pipe system model was established based on ABA QUS software considering the plastic damage of con-Crete.The natural frequencies and modes of the soil-tunnel-pipe system were calculated,and the internal forces and deformations of the pipes under the design earthquake were solved.The study showed that,there are obvious differences in the natural frequencies and modes between the pipe and the tunnel,which means there is obvious interaction between the pipe and the tunnel.The impact of the pier hoop on the internal forces of the pipe cannot be ignored.The seismic analysis of the pipe in the tunnel requires modelling and analysis of the soil-tunnel-pipe system.The study may be a reference for the lateral seismic design of discontinuous pipes in precast underground utility tunnel.
作者
王长祥
黄宇昊
梁建文
李东桥
Wang Changxiang;Huang Yuhao;Liang Jianwen;Li Dongqiao(North China Municipal Engineering Design&Research Institute Co.,Ltd,Tianjin 300074,China;School of Civil Engineering,Tianjin University,300350,China)
出处
《特种结构》
2023年第2期50-55,共6页
Special Structures
基金
国家重点研发项目(2017YFC0805000)。
关键词
预制地下管廊
管廊内非连续管道
土-管廊-管道系统
抗震分析
Underground precast utility tunnel
Discontinuous pipes in utility tunnel
Soil-tunnel-pipe system
Seismic analysis
