摘要
为进一步提高强震区城市矩形隧道衬砌结构的抗震性能,依托某城市浅埋隧道的工程条件,利用有限元模拟软件ABAQUS,对该隧道采用不同厚度垫层减震层的减震效果进行优选研究。研究结果表明:施设5 cm厚垫层减震层后,衬砌结构的最大、最小主应力分别减小21.55%、45.34%,最大剪切应力减小41.74%,轴力和最大弯矩分别减小8.94%、18.82%,最小安全系数提高17.65%;施设10 cm厚垫层减震层后,衬砌结构的最大、最小主应力分别减小17.62%、45.47%,最大剪切应力减小43.07%,轴力和最大弯矩分别减小10.10%、20.07%,最小安全系数提高18.69%;施设15 cm厚垫层减震层后,衬砌结构的最大、最小主应力分别减小22.49%、46.78%,最大剪切应力减小43.27%,轴力和最大弯矩分别减小11.34%、19.42%,最小安全系数提高17.80%;与施设5 cm、15 cm厚垫层减震层时的减震效果相比,施设10 cm厚垫层减震层的减震效果最好。
To further improve the seismic performance of the lining structure of the rectangular tunnel in the strong earthquake area,based on the engineering conditions of a shallow buried tunnel in a city,using the finite element simulation software ABAQUS,this paper studies the optimal damping effect of the tunnel with different thickness of damping layer.The results show that the maximum and minimum principal stresses of the lining structure are reduced by 21.55%and 45.34%,the maximum shear stress is reduced by 41.74%,and the axial force and maximum bending moment are reduced by 8.94%and 18.82%,the minimum safety factor increased by 17.65%when the shock absorbing layer with a thickness of 5cm is applied;When the shock absorbing layer with a thickness of 10cm is applied,the maximum and minimum principal stresses of the lining structure were reduced by 17.62%and 45.47%,the maximum shear stress was reduced by 43.07%,and the axial force and The maximum bending moment was reduced by 10.10%and 20.07%,and the minimum safety factor was increased by 18.69%.When the shock absorbing layer with a thickness of 15cm is applied,the maximum and minimum principal stresses of the lining structure were reduced by 22.49%and 46.78%,the maximum shear stress is reduced by 43.27%,the axial force and the maximum bending moment were reduced by 11.34%and 19.42%,and the minimum safety factor was increased by 17.80%;Compared with the shock absorption effect when the shock-absorbing layer thickness is 5cm and 15cm,the shock absorption effect when the shock-absorbing layer thickness is 10cm is the best.
作者
陈征
崔光耀
张建军
肖剑
安栋
CHEN Zheng;CUI Guang-yao;ZHANG Jian-jun;XIAO Jian;AN Dong(School of Civil Engineering,North China University of Technology,Beijing 100144,China;North China Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300051,China;MCC Communication Construction Group Co.Ltd.,Beijing 100011,China)
出处
《河南城建学院学报》
CAS
2020年第3期1-6,37,共7页
Journal of Henan University of Urban Construction
基金
国家自然科学基金项目(51408008)
中冶交通建设集团科技计划项目(2017-SZ03)
北方工业大学毓优人才支持计划。
关键词
强震区
城市隧道
垫层
减震层
减震效果
strong earthquake area
urban tunnel
cushion layer
shock absorbing layer
damping effect
