摘要
悬浮隧道是一种全浸入式新型跨越结构,在复杂海湾环境中有较高的应用前景。为了深入了解悬浮隧道在外界激励下的动力行为,整理了悬浮隧道动力学的研究假定,分别总结了悬浮隧道独立结构和整体结构在一般波流荷载、交通荷载以及偶然荷载作用下的数学模型与动力学研究进展,并归纳了影响结构动力响应的几何、环境和交通参数等因素。结果表明:管道计算模型普遍采用欧拉梁模型和离散弹性支承梁模型,锚索计算模型大多采用忽略了抗弯刚度并考虑初始构型的梁或者弦模型;在二维分析中梁模型具有较高精度,但少有学者进行三维空间下的讨论;物理实验需要考虑模型的适用性、环境的真实性和测量的准确性,着重针对结构相似、激励条件、测量手段、结构初始状态和整体系统固有动力参数进行测试;偶然荷载作用下地震动响应受到学者广泛关注,已有研究普遍表明:结构的地震响应一般在安全范围内,但是当考虑了由地震引起的动水压力之后,结构动力响应大大提高。
The submerged floating tunnel(SFT) is a new type of fully immersed structures for crossing, which has a high application prospect in complex bay environment. To understand the dynamic behavior of SFTs under external excitation, the assumptions of dynamics are firstly sorted out. The mathematical models and dynamic research progress of the independent structure and the whole structure of SFTs under general wave current load,traffic load and accidental load are summarized. The factors affecting the dynamic response of the structure,including the geometric parameters, environmental parameters and traffic parameters, are summarized. The results show that the Euler beam model and discrete elastic support beam model are widely used for pipeline models, and that the beam model that ignores the bending stiffness and considers the initial configuration is mostly used in the calculation model for anchor cables. In two-dimensional analyses, the beam model has high accuracy, but few scholars have discussed it in three-dimensional space. Experiments need to consider the applicability of the model, the representativeness of the environment reality and the accuracy of the measurement, and to focus on the similarity, excitation, measurement methods, the initial state of the structure and the inherent dynamic parameters of the whole system. The seismic response has been widely concerned by scholars. Previous studies have generally shown that the seismic response of the structures is generally within the safe range. However, the dynamic response of the structure is greatly increased when the hydrodynamic pressure caused by earthquakes is considered.
作者
周泰翔
贾军波
邓扬
李爱群
ZHOU Tai-xiang;JIA Jun-bo;DENG Yang;LI Ai-qun(School of Civil and Transportation Engineering,Beijing University of Engineering and Architecture,Beijing 100044,China)
出处
《工程力学》
EI
CSCD
北大核心
2022年第4期15-28,85,共15页
Engineering Mechanics
基金
国家自然科学基金项目(51978033,51878027)
北京市教委科技项目(KM201910016013)
青年拔尖人才项目(CIT&TCD201904060)。
关键词
桥梁与隧道工程
悬浮隧道
综述
力学特性
动力响应
bridge and tunnel engineering
SFT
overview
mechanical properties
dynamic response
