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Probabilistic Performance Criteria for Tall Buildings Subjected to Wind

机译:受风影响的高层建筑的概率性能标准

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Database-assisted design (DAD) for wind loads consists of (1) using simultaneous measurements of wind-induced pressure time histories at a large number of taps on a model structure's envelope, and (2) using those time histories to estimate the structural response in each member, both for rigid and flexible buildings. The paper lists the shortcomings of the High Frequency Force Balance approach, which are eliminated if the DAD approach is used, and shows how the DAD approach can be used to provide clear, transparent information that can be used directly and effectively in design. DAD allows the development of reliability procedures to estimate probabilities that the structure will satisfy specified performance criteria under extreme winds. In this paper we outline such a procedure for tall buildings with specified natural frequencies and damping ratios. The internal forces and their combinations, as they appear in design interaction formulas, are affected by climatological, micrometeorological, aerodynamic, and mechanical parameter uncertainties. The reliability procedure we propose accounts for those uncertainties and integrates information on the directional wind climate and the building's directional aerodynamics.
机译:用于风荷载的数据库辅助设计(DAD)包括(1)在模型结构的包络线的大量抽头上同时测量风致压力时间历史,以及(2)使用这些时间历史来估计结构响应在每个构件中,都适用于刚性和柔性建筑物。本文列出了高频力平衡方法的缺点,如果使用DAD方法,则可以消除这些缺点,并说明如何使用DAD方法提供清晰,透明的信息,这些信息可以直接有效地用于设计中。 DAD允许开发可靠性程序来估计在极端风下结构将满足指定性能标准的概率。在本文中,我们概述了具有指定固有频率和阻尼比的高层建筑的此类程序。出现在设计相互作用公式中的内力及其组合受气候,微气象,空气动力学和机械参数不确定性的影响。我们提出的可靠性程序解决了这些不确定性,并整合了定向风气候和建筑物定向空气动力学方面的信息。

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