降低超高层建筑横风向响应的气动措施研究进展

Aerodynamic Measures for Mitigation of Across-wind Responses of Super Tall Buildings:State of the Art

摘要:

随着科学技术的进步，现代超高层建筑向高柔方向发展，其横风向荷载和响应问题越来越显著，成为结构设计中必须重点关注的问题。降低超高层建筑横风向荷载和响应的措施主要有空气动力学措施（简称气动措施）、结构措施以及外设阻尼器措施三种，其中气动措施的机制是通过设计合适的建筑外型（或适当的局部修正）使其满足抗风要求。本文对超高层建筑抗风气动措施的研究成果进行了总结，这些措施主要有：选择气动性能好的基本截面形状，横截面角部处理、横截面沿高度变化、立面开洞，等等。同时，本文还指出目前研究和工程应用中需要注意的问题，以及今后研究的建议。

Abstract:

With the development of science and technology, modern super-tall building is becoming more slender and flexible, which will lead to more serious across-wind loads and responses of them. Measures for mitigation of across-wind loads and responses of super tall buildings are mainly aerodynamic measures, structural measures and additional dampers. Appropriate designing of architectural configuration or appropriate local modifications of cross-section of buildings can mitigate the across-wind loads and responses, which is the mechanism of aerodynamic measures. This paper presents an overview of past/recent work on aerodynamic measures for mitigation of across-wind responses of super tall buildings, including selecting basic cross-section configuration with good aerodynamic features, modifying corner details, variation of cross-section shape along building height, openings on building walls, and so on. Furthermore, issues of concern in the research and application are pointed out, and suggestions for future research are also given.