论文部分内容阅读
常规的幕墙抗震设计,往往只考虑玻璃质量对幕墙整体的影响而忽略玻璃刚度,将玻璃结构转化为等效质量施加于幕墙支撑结构进行抗震分析。然而,当幕墙结构承受大震作用时,幕墙支撑结构已进入塑性状态,将产生较大变形,此时玻璃刚度将在一定程度上影响幕墙整体刚度。尤其是对于复杂的超高层幕墙结构,玻璃刚度对幕墙整体刚度的影响具有一定的未知性,需要深入研究。针对这一问题,本文依托上海中心大厦幕墙结构,研究了考虑玻璃结构的幕墙大震下的弹塑性响应,并将其与未考虑玻璃结构的响应进行对比分析。结果表明,玻璃结构对建筑主体结构影响较少,对幕墙结构层间位移角抑制明显,从而减少了支撑结构内力;对高楼层,加速度放大系数有一定抑制作用,但对低楼层,加速度放大系数抑制作用有限。
Conventional curtain wall seismic design often only considers the influence of glass quality on the whole curtain wall and neglects the stiffness of glass, and transforms the glass structure into equivalent quality and applies it to the curtain wall support structure for seismic analysis. However, when the curtain wall structure under earthquake, the curtain wall support structure has entered the plastic state, will have a greater deformation, then the glass stiffness will affect the overall stiffness of the curtain wall to a certain extent. Especially for the complex super high-rise curtain wall structure, the influence of glass stiffness on the overall stiffness of the curtain wall has a certain unknown, need further study. In response to this problem, this paper, based on the curtain wall structure of Shanghai Central Tower, studies the elasto-plastic response under curtain wall earthquake considering the glass structure and compares it with the response without considering the glass structure. The results show that the influence of the glass structure on the main structure of the building is less, and the displacement angle between the curtain walls is significantly suppressed, so the internal force of the support structure is reduced; while the amplification factor of the high floor and the acceleration is restrained. However, Inhibition is limited.