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高层建筑层数多,高度大,体型复杂,是三维空间结构。在竖直方向由许多抗侧力结构(如框架、剪力墙、筒体等)组成,在水平方向上则有许多楼板连结,有时还有刚性水平大梁、刚性桁架加劲。它除了承受静力荷载外,还受到风和地震等动力作用。在地震作用下,结构进入弹塑性大变形状态。由于结构组成和荷载作用的复杂性,因而高层建筑结构的力学分析成为结构力学中一个计算复杂、难度较大的问题。
High-rise buildings have many layers, high heights and complex body shapes, and are three-dimensional structures. In the vertical direction, it is composed of many anti-lateral structures (frames, shear walls, cylinders, etc.). There are many floor connections in the horizontal direction, sometimes rigid horizontal beams, and rigid trusses. In addition to being subjected to static loads, it is also affected by wind and earthquake forces. Under the action of the earthquake, the structure enters a large elastic-plastic deformation state. Due to the complexity of structural composition and loading, the mechanical analysis of high-rise building structures has become a complex and difficult problem in structural mechanics.