摘要
高层建筑风振舒适度已受到普遍关注,目前常采用规范的经验公式和风洞模型试验实测计算。但随着结构体系的复杂化及采用附加阻尼器减振技术的日益广泛化,进行结构的风振时程分析是更为简单直接和准确的分析方法。本文采用自回归滤波法技术,考虑三维空间相关性,对具有随机性的脉动风荷载进行有效的模拟;通过编制软件生成风压时程数据并自动输出至结构有限元软件进行风振时程分析,为高层建筑的风振控制分析提供了可行的方法;最后,将该风动力荷载数值模拟技术与动力时程分析技术相结合进行算例分析验证,经过对比研究表明该风振时程分析方法可应用于工程分析与设计。
Wind-induced comfort problems of tall building have raised more and more attention, empirical formulas from design codes and wind tunnel experiment method are widely used nowadays. However, as the complicate structure systems and especial structures with viscous dampers are widely applied, wind load time-history analysis method is more precise. In this paper, auto-regressive method is used to simulate the random wind dynamic loads which consider 3D spatial correlation. The computer program is developed to produce wind load time-history and export to FEM program to carry out the time-history analysis under wind-induced vibration. The program provides feasible method for analysis of wind-induced vibration of tall building structure .The proposed method was applied in numerical simulation of several typical examples. The results verify the effectiveness of this simulation method in practical structural analysis.
出处
《华中科技大学学报（城市科学版）》
CAS
2008年第3期136-139,145,共5页
Journal of Huazhong University of Science and Technology
基金
广东省自然科学基金(06105416)
关键词
风振控制
风荷载时程
时程分析
自回归滤波法
wind-induced vibration control
wind load time-history
time-history analysis
auto-regressive
