摘要
我国的改革开放政策带来了大跨度桥梁和高耸结构建设的高潮。随着结构跨度和高度的增大,风对这些柔性结构的作用就不限于静力风荷载,而必须考虑各种风致振动问题,以及由此引起的动力风效应。 国际风工程界对结构风效应的研究已着重于非线性风致振动的精细化,结构气动参数的精确识别以及为风洞试验所需的紊流风场的真实模拟。结构抗风设计也正从确定性方式向基于可靠性理论的概率性评价过渡。 为了使我国结构风工程领域的研究全面赶上世界先进水平,并为解决进入21世纪的特大跨度桥梁和超高层建筑中的风工程问题作好准备,本文提出了一些迫切需要进行的研究热点。
The reform and open policy in China has brought an upsurge in building long-span bridges and tall structures. With the increase of span-length and height, the wind effects on these more flexible structures have not been confined to static wind loading, and the dynamic wind effects due to various wind-induced vibrations must be considered.The international wind engineering circle has emphasized the studies on this area to the refinement of nonlinear wind-induced vibrations, the precise identification of aerodynamic parameters for structures as well as the real simulation of natural turbulent flow field for wind tunnel tests. The wind-resistant design of structures is also being transited form the deterministic pattern to a reliability theory based probabilistic assessment.Some hot spots of researches, which should be conducted urgently, are presented in this paper in order to make the study of wind effects on structures in our country catching-up completely with the advanced world level, and to get ready for solving the wind engineering problems in extra long-span bridges and super-tall structures into 21st century.
出处
《振动与冲击》
EI
CSCD
1997年第4期1-5,共5页
Journal of Vibration and Shock
关键词
结构风工程
大跨高耸结构
风致振动
structures wind engineering, long-span and tall structures, wind-induced vibrations
