[1]甘梦云,梁建文,李东桥,等.基于壳-弹簧模型的预制地下管廊横向抗震分析[J].自然灾害学报,2022,31(02):102-110.[doi:10.13577/j.jnd.2022.0211]
 GAN Mengyun,LIANG Jianwen,LI Dongqiao,et al.Lateral seismic analysis of precast utility tunnels using the shell-spring model[J].,2022,31(02):102-110.[doi:10.13577/j.jnd.2022.0211]
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基于壳-弹簧模型的预制地下管廊横向抗震分析
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
31
期数:
2022年02期
页码:
102-110
栏目:
出版日期:
2022-04-28

文章信息/Info

Title:
Lateral seismic analysis of precast utility tunnels using the shell-spring model
作者:
甘梦云1 梁建文1 李东桥1 赵华2
1. 天津大学 建筑工程学院, 天津 300350;
2. 天津市建筑设计院, 天津 300074
Author(s):
GAN Mengyun1 LIANG Jianwen1 LI Dongqiao1 ZHAO Hua2
1. School of Civil Engineering, Tianjin University, Tianjin 300350, China;
2. Tianjin Architecture Design Institute, Tianjin 300074, China
关键词:
预制地下管廊横向抗震分析反应位移法钢绞线预应力承插口接头壳-弹簧模型梁-弹簧模型
Keywords:
precast utility tunnellateral seismic analysisresponse deformation methodprestress of steel strandbell and spigot jointsshell-spring modelbeam-spring model
分类号:
TU452;X43
DOI:
10.13577/j.jnd.2022.0211
摘要:
利用ABAQUS有限元软件,采用壳单元模拟预制装配式地下管廊,非线性弹簧模拟管段承插口接头的力学行为,非线性地基弹簧模拟土-结构间相互作用,文中提出一种适用于预制管廊横向抗震分析的壳-弹簧计算模型。以天津市某拟建地下管廊为例,对4个计算工况进行了横向抗震分析。结果表明,壳-弹簧模型内力较梁-弹簧模型均有所增大,轴力、剪力、弯矩分别增大17.4%、22.7%和27.9%;考虑管段间钢绞线预应力时,内力在幅宽上有明显变化且在承插口接头处明显增高;引入管廊结构材料塑性后,管廊层间变形显著增大,且较之线弹性模型增大了68.7%。文中的壳-弹簧模型可反映预制综合管廊结构的弹塑性行为及接头钢绞线预应力影响,对预制综合管廊抗震设计有一定指导作用。
Abstract:
By using ABAQUS finite element software,the shell element is used to simulate the precast utility tunnel. The nonlinear spring is used to simulate the mechanical behavior of the bell and spigot joint,as well as the nonlinear soil spring is used to simulate the soil-structure interaction. A shell-spring model considering the influence of prestress of precast joint is proposed for lateral seismic analysis of precast utility tunnels. Taking a precast utility tunnel in Tianjin as an example,the lateral seismic analysis of four working cases is carried out in this paper. The results show that the internal force of the shell-spring model is larger than that of the beam-spring model. The axial force,shear force and bending moment increase by 17.4%,22.7% and 27.9% respectively. When considering the prestress of steel strand between tunnel segments,the internal force changes significantly within the segment and increases significantly at the precast bell and spigot joint. The deformation between top and bottom slab of the utility tunnel increases significantly after introducing material plasticity into the utility tunnel model. Meanwhile,the shell-spring model with structural plasticity increases by 68.7% compared with that of the linear model. The shell-spring model in this paper can reflect the elastic-plastic behavior of precast utility tunnel and the influence of the prestress of steel strand,which has a certain guidance in the seismic design of precast utility tunnel.

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备注/Memo

备注/Memo:
收稿日期:2020-12-3;改回日期:2021-12-28。
基金项目:国家自然科学基金项目(51978462)
作者简介:甘梦云(1996-),女,硕士研究生,主要从事地震工程研究.E-mail:gmy_why@163.com
通讯作者:梁建文(1965-),男,教授,博士,主要从事地震工程研究.E-mail:liang@tju.edu.cn
更新日期/Last Update: 1900-01-01