基于耦合模型的土与浅埋隧道非线性动力分析
|
摘要
文章在考虑了土体和结构的动相互作用基础上,采用耦合模型对浅埋隧道进行抗震分析。该模型中不同的单元可以模拟结构不同的部位:有限元可以模拟土体非线性本构关系、土体的分成性;接触面单元可以模拟土体和钢筋混凝土之间的滑移、拉裂、嵌入等现象;无限元可以模拟无限远处土体位移为零的特征。文中首先阐述了接触元的原理以及单元刚度矩阵的积分形式;然后推导了平行无限元的单元刚度矩阵。通过对某双洞矩形截面隧道的地震反应分析,为同类型工程的抗震设计提供指导性意见。
Based on the principle of soil-structure interaction, the coupled model is used to analyze the seismic responses of a shallow embedded tunnel. Different parts of the structure are simulated by different elements. Finite elements can imitate the nonlinear constitutive relation and the layered characteristics of soils. Contact interface elements can be used to simulate the slipping and tension crack between soil and reinforced concrete wall. Infinite elements can be used to simulate the displacements far away from the structure. The paper firstly describes the theory of contact interface elements and introduces the integral form of element stiffness matrix, then puts forward the matrix of an infinite element. Seismic analysis is carried out for a shallow double cell rectangular tunnel, the results obtained can be referred to by similar projects.
Based on the principle of soil-structure interaction, the coupled model is used to analyze the seismic responses of a shallow embedded tunnel. Different parts of the structure are simulated by different elements. Finite elements can imitate the nonlinear constitutive relation and the layered characteristics of soils. Contact interface elements can be used to simulate the slipping and tension crack between soil and reinforced concrete wall. Infinite elements can be used to simulate the displacements far away from the structure. The paper firstly describes the theory of contact interface elements and introduces the integral form of element stiffness matrix, then puts forward the matrix of an infinite element. Seismic analysis is carried out for a shallow double cell rectangular tunnel, the results obtained can be referred to by similar projects.
引文
[1]孙钧,候学渊.地下结构(下册)[M],北京:科学出版社,1988,783～794
[2]洪代铃.日本沉管隧道设计特点[J],世界隧道(现代隧道技术),1997(3);53～62
[3]姜忻良,宋梅.软土地层中地下隧道结构地震反应分析[J],地震工程与工程振动,1999,19(1):65～69
[4]杨小礼,李亮.层状地基中交通隧道地震反应分析[J],长沙铁道学院学报2000(4):15～19
[5]邓芃.在地震作用下土与浅埋隧道的动相互作用的非线性分析.(硕士学位论文)[D].天津大学,天津大学图书馆,2003,35～42
[6]钱家欢,殷宗泽.土工原理与计算[M].北京:中国水利水电出版社,第二版,1996,210～212
[7]吴世明.土动力学[M].北京:中国建筑工业出版社,2000:75～106
[8]胡聿贤.地震工程学[M].北京:地震出版社,1988:287～294
[9]黄宗明,白绍良.结构地震反应时程分析中阻尼问题评述[J],地震工程与工程振动,1996,16(2):95～105
[2]洪代铃.日本沉管隧道设计特点[J],世界隧道(现代隧道技术),1997(3);53～62
[3]姜忻良,宋梅.软土地层中地下隧道结构地震反应分析[J],地震工程与工程振动,1999,19(1):65～69
[4]杨小礼,李亮.层状地基中交通隧道地震反应分析[J],长沙铁道学院学报2000(4):15～19
[5]邓芃.在地震作用下土与浅埋隧道的动相互作用的非线性分析.(硕士学位论文)[D].天津大学,天津大学图书馆,2003,35～42
[6]钱家欢,殷宗泽.土工原理与计算[M].北京:中国水利水电出版社,第二版,1996,210～212
[7]吴世明.土动力学[M].北京:中国建筑工业出版社,2000:75～106
[8]胡聿贤.地震工程学[M].北京:地震出版社,1988:287～294
[9]黄宗明,白绍良.结构地震反应时程分析中阻尼问题评述[J],地震工程与工程振动,1996,16(2):95～105
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心