盾构隧道管片衬砌的平板壳-接缝元-地基系统模型研究  

STUDY ON FLAT SHELL-JOINT ELEMENT-FOUNDATION MODEL FOR SEGMENT OF SHIELD TUNNELS

作　　者：赵大洲[1] 景来红[1] 

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《工程力学》2011年第6期110-117,共8页Engineering Mechanics

基　　金："十一五"国家科技支撑计划项目(2006BAB04A06)

摘　　要：基于Mindlin平板理论及钢筋混凝土分层组合式模型,提出了平板壳-接缝元-地基系统模型。模型以所构造的接缝元模拟管片衬砌间力的传递,可体现管片中钢筋、接缝处各种构造对衬砌结构力学性能的影响。模型在对管片接缝的模拟中以较容易确定的止水、衬垫、螺栓和混凝土等材料的力学及几何指标替代了传统方法中不易确定的接缝刚度指标,可更真实地反映管片结构的力学性态、提高计算结果的准确性。通过算例验证了模型的合理性和有效性。Based on Mindlin plate theory and a layered and combined model of reinforced concrete,a flat shell-joint element-foundation model is proposed.The mechanical characteristics of segment joints can be simulated by the joint element model which is presented in this paper.The influence on the mechanical characteristics of lining segments,which is due to the reinforced bars and different structures of the joint zone,can be correctly simulated by the model.The mechanical and geometrical parameters of water-proof plastic,load cushion,conjunction bolts and concrete which can be obtained easily by test are used in the model instead of the joint stiffness parameters which are hard to be ascertained but used in the conventional model.Thusly,by using the model,the actual mechanical behavior of the segmental linings can be reflected and the calculation accuracy can be improved.The validity and effectivity of the model is demonstrated by examples.

关 键 词：盾构隧道 管片衬砌 平板壳 接缝模型 弹性地基 

分 类 号：TU318[建筑科学—结构工程] U451.4[建筑科学—桥梁与隧道工程]