黄铭枫. 基于风振性能的高层建筑抗风设计优化[J]. 工程力学, 2013, 30(2): 240-246,253. DOI: 10.6052/j.issn.1000-4750.2011.08.0519
引用本文: 黄铭枫. 基于风振性能的高层建筑抗风设计优化[J]. 工程力学, 2013, 30(2): 240-246,253. DOI: 10.6052/j.issn.1000-4750.2011.08.0519
HUANG Ming-feng. WIND-INDUCED VIBRATION PERFORMANCE-BASED OPTIMAL STRUCTURAL DESIGN OF TALL BUILDINGS[J]. Engineering Mechanics, 2013, 30(2): 240-246,253. DOI: 10.6052/j.issn.1000-4750.2011.08.0519
Citation: HUANG Ming-feng. WIND-INDUCED VIBRATION PERFORMANCE-BASED OPTIMAL STRUCTURAL DESIGN OF TALL BUILDINGS[J]. Engineering Mechanics, 2013, 30(2): 240-246,253. DOI: 10.6052/j.issn.1000-4750.2011.08.0519

基于风振性能的高层建筑抗风设计优化

WIND-INDUCED VIBRATION PERFORMANCE-BASED OPTIMAL STRUCTURAL DESIGN OF TALL BUILDINGS

  • 摘要: 提出了一个基于风振性能的结构优化设计方法来解决高层建筑在各种风灾条件下的风致性能设计问题。借签抗震性能设计方法,划分了高层建筑的三水准抗风设防标准。各水准下的风灾烈度及其概率要素可以通过对气象部门的极端风速记录开展统计极值分析来进行。基于高层建筑风致动力响应的频域内风振模态分析,给出了各种风致加速度指标的实用表达式。通过数学建模对风致性能的结构优化设计问题作出了精确描述,用结构构件尺寸等设计变量显式的表达出各种风振性能设计指标。发展了基于优化准则法的数值算法来求解高层建筑在多种风致性能设计约束条件下的结构最优设计。最后,通过一个40层住宅楼的工程实例验证了文中提出的多级抗风性能自动化结构设计方法的有效性和实用性。

     

    Abstract: This paper presents an integrated computer-based analysis and an optimal design method for the performance-based design of tall buildings under various levels of wind hazards. Performance-based wind engineering design framework for tall buildings has been proposed by considering three performance levels, i.e., life safety, damage reduction, habitability and operation under exposure to extreme wind events. The design wind speeds corresponding to multi-level wind hazards can be statistically estimated using meteorological wind speed data. Based on random vibration theory, the wind-induced responses of a tall building can be analyzed and formulated in the frequency domain for wind-induced performance assessment. A rigorously derived Optimality Criteria (OC) method is to be developed for achieving the optimal structural design solution of a tall building satisfying multiple wind-resistant performance constraints, i.e., the element strength, the system drift and acceleration design constraints. The effectiveness and practicality of the optimal performance-based design technique are illustrated by a 40-storey residential building with complex 3D mode shapes. Results have shown that the automated design optimization technique provides a powerful tool for multi-level performance-based design of wind sensitive tall building structures.

     

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