沈阳奥体中心大跨度预应力混凝土楼盖动力特性实测与分析

Field Test of Dynamic Properties of A Long-Span Pre-Stressed Concrete Floor System in Shenyang Olympic Center

大跨度预应力混凝土及钢-混凝土组合楼盖在体育建筑、大跨空间结构及高层建筑中的使用越来越广泛。由于大跨度楼盖阻尼小、基频低,在人日常活动激励等作用下会产生竖向振动,超过一定限度时会影响使用者的舒适度。因此,大跨度楼盖竖向振动舒适度问题日益受到重视。沈阳奥体中心综合体育馆三层楼盖主梁跨度41.5 m,是目前国内体育建筑中跨度最大的混凝土楼盖系统。本文针对此楼盖系统的动力特性进行了现场实测,并与理论分析结果进行了比较。

Long-span floors, such as post-tensioned floors and steel-concrete composite floors, are widely used in stadiums, buildings with large open space and high buildings. With small damping and low fundamental frequency, they are sensitive to floor vibration due to human activity. It may affect people＇ s serviceability when floor vibration is excessive. So vibration serviceability for long-span floors has been a considerable problem. Taking the Shenyang Olympic Center as an example, field measurements and analysis of its dynamic properties were carried out and the results were compared with those obtained by finite element analysis.