摘要
以高速铁路隧道健康服役重大需求为出发点,对高速铁路隧道缺陷结构检测及特征、动力荷载特征、力学行为及其动力损伤本构模型、动力响应规律、服役状态演变规律及服役性能评估等方面进行研究;指出研究中的难点:复杂形态隧道缺陷结构表征特征,衬砌裂纹扩展机制及龟裂块体结构的联动作用规律,典型缺陷结构的动力损伤本构模型构建,含缺陷高速铁路隧道三维精细仿真模型构建,以及高速铁路隧道服役状态评价体系的构建和安全阈值的识别;同时指出高速铁路隧道缺陷结构的受荷模式及动力荷载特征、缺陷结构体动力响应规律及其损伤特性、含缺陷高速铁路隧道结构状态从"缺陷→病害→致灾"的演变机制是研究中的关键科学问题。针对研究中的关键科学问题和研究难点分别提出拟采取的解决方法。
Focusing on the requirements for HSR tunnel healthy service, the paper carries out the research in the defect structure and characteristics, dynamic loading characteristics, mechanical behaviors and its dynamic damage constitutive model, dynamic response rule, service condition evolvement rule and service performance evaluation of HSR tunnel. The paper points out the difficulties of the research： characteristics of defect structure in complex shape tunnel, lining crack extension mechanism and the linkage mechanism of cracked block structure, building of constitutive model of dynamic damage of typical defect structure, building of 3D simulation model of HSR tunnel with defect, building of evaluation system for service condition of HSR tunnel and recognition of safety threshold. The paper also highlights key scientific issues in the research including loading mode and dynamic load characteristics of defect structure of HSR tunnel, dynamic response rules and damage characteristics of defect structure, ＂defect→disease→disaster＂evolution mechanism of structural state of HSR tunnel with defect. The paper proposes solutions to key scientific issues and difficulties in the research.
作者
张千里
马超锋
马伟斌
王志伟
郭小雄
余东洋
ZHANG Qianli;MAChaofeng;MAWeibin;WANG Zhiwei;GUO Xiaoxiong;YU Dongyang(Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China)
出处
《中国铁路》
2018年第6期1-4,共4页
China Railway
基金
国家自然科学基金委员会-中国铁路总公司高速铁路基础研究联合基金项目(U1434211)
中国铁路总公司科技研究开发计划项目(2017G004-D)
中国铁道科学研究院科技研究开发计划项目(2016YJ032
2017YJ029)
关键词
高速铁路
隧道
结构缺陷
致灾机理
服役状态
HSR
tunnel
structural defect
disaster-causing mechanism
service condition
