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超高层建筑高、柔,风振影响显著,工程中常需配置调频液柱阻尼器(TLCD)以减小振动、提高人居舒适度。针对在强风作用下TLCD可能存在液体运动撞击容器顶部或液面低于水平段等失效问题,进行了TLCD的抗风可靠度研究,并对超高层建筑结构-TLCD体系的生命周期费用进行了分析。采用虚拟激励法计算结构-TLCD体系在脉动风荷载下的随机风振响应;基于随机振动的首次超越破坏准则,研究结构-TLCD体系在不同风速风载下的动力可靠度;分析结构-TLCD体系的风振舒适度生命周期费用;依据生命周期费用最小原则进行投资决策,是基于性能的抗风设计的具体应用。利用该方法对某超高层建筑结构的TLCD安装与否进行了投资决策,说明了本方法的适用性。
High-rise buildings are affected by high and soft buildings, and wind-induced vibration is significant. Frequency-modulated liquid column dampers (TLCDs) are often required in the project to reduce vibration and improve the comfort of people. In view of the failure of the TLCD in the presence of strong winds, such as the impact of liquid motion on the top of the container or the liquid level below the horizontal section, the TLCD wind resistance reliability study was carried out, and the life cycle cost of the TLCD system for the high-rise building structure was analyzed. . The virtual excitation method is used to calculate the random wind-induced vibration response of the structure-TLCD system under fluctuating wind loads. Based on the first-ever surpassing failure criterion of random vibration, the dynamic reliability of the structure-TLCD system under different wind speeds and wind loads is studied. The structure-TLCD system is analyzed. The wind-induced vibration comfort life cycle cost; investment decision-making based on the minimum life cycle cost principle is a specific application of performance-based wind resistance design. Using this method, investment decision was made for the installation of TLCD in a super high-rise building structure, which demonstrated the applicability of this method.