摘要
利用ABAQUS有限元软件,建立了组合式预制管廊三维壳-弹簧有限元模型,研究地震作用下组合式预制管廊之间的相互作用,以及组合式预制管廊的整体抗震性能。采用壳单元模拟管廊结构,非线性弹簧单元模拟管廊承插式接头、钢绞线、舱室之间填充的泡沫板材料,非线性地基弹簧模拟土-结构相互作用。利用反应位移法计算了组合式预制三舱(双舱+单舱)管廊在安评波作用下的变形及内力响应。研究表明,安评波不同入射角度下,双舱管廊和单舱管廊之间存在相互作用,但管廊之间峰值相对位移小于其初始间距;随着安评波入射角度的增加,双舱管廊和单舱管廊的接头张开量及内力均呈现先增大后减小的趋势,接头张开量和截面内力峰值均满足抗震验算要求。
This paper established a three-dimensional shell-spring finite element model,and made studies on the tunnel-tunnel interaction and longitudinal overall seismic capability of combined precast utility tunnels.The utility tunnels are modelled by shell elements,the socket joint,steel strand and foam board material between tunnels are modelled by nonlinear springs,and the soil-tunnel interaction is modelled by nonlinear soil springs.The deformation and internal force of the combined precast three-cabin(double-cabin+single-cabin)utility tunnels under seismic safety evaluation waves were calculated by response deformation method.It is shown that,there exists tunnel-tunnel interaction and the relative peak displacements between tunnels are less than the initial interval value under different incident angles;the joint opening and internal force increase and then decrease as the increasing of incident angle,and both the peak joint opening and peak internal force meets the seismic design requirements.
作者
王长祥
梁建文
李东桥
甘梦云
闫启超
WANG Changxiang;LIANG Jianwen;LI Dongqiao;GAN Mengyun;YAN Qichao(North China Municipal Engineering Design&Research Institute Co.,Ltd,Tianjin 300074,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)
出处
《自然灾害学报》
CSCD
北大核心
2020年第3期1-8,共8页
Journal of Natural Disasters
基金
国家重点研发项目(2017YFC0805000)。
关键词
组合式预制管廊
三舱管廊
双舱管廊
单舱管廊
壳-弹簧模型
纵向抗震分析
反应位移法
combined precast utility tunnel
three-cabin tunnel
double-cabin tunnel
single-cabin tunnel
shell-spring model
longitudinal seismic analysis
response deformation method
