55m长18m高单片异形剪力墙结构选型分析

Structural selection analysis of monolithic special-shaped shear wall structure with 55m long and 18m high

以某特种工程的55m长、18m高单片槽形剪力墙结构为例,分析单片异形剪力墙结构的结构选型。单片异形剪力墙结构不仅要承担竖向荷载,更要承受水平地震作用及风荷载,该结构的特点是平面内刚度大,平面外刚度极小,在竖向荷载和水平荷载共同作用下,单片异形剪力墙结构容易发生平面外失稳甚至整体倾覆。因此在工程结构设计中通过协调X、Y向整体刚度来达到减小单片异形剪力墙结构平面外位移,提高其抗侧移能力的目的,从而保证所设计工程结构的侧向稳定性。通过使用盈建科(YJK)软件建立结构模型、开展结构计算分析,并依据得出的结构整体性能指标(质量比、刚度比、剪重比、刚重比、位移比等),对结构模型进行调整优化,最终使结构体系满足可靠性要求。

Taking the 55m long and 18m high monolithic slotted shear wall structure of a special project as an example,the structural selection of monolithic special-shaped shear wall structure is analyzed.The monolithic special-shaped shear wall structure should bear not only the vertical load,but also the horizontal earthquake and wind load.The structure is characterized by large in-plane stiffness and minimal out-of-plane stiffness.Under the action of vertical and horizontal load,the monolithic special-shaped shear wall structure is prone to out-of-plane instability and even overturning.Therefore,by coordinating the overall stiffness of X and Y direction in the structural design,the purpose of reducing the out-of-plane displacement of the monolithic special-shaped shear wall structure and improving its anti-lateral displacement ability is achieved,so as to ensure the lateral stability of the designed structure.By using YJK software,the structural model is established,the structural calculation and analysis are carried out,and the structural model is adjusted and optimized according to the overall performance indicators of the structure(mass ratio,stiffness ratio,shear weight ratio,rigid-weight ratio,displacement ratio,etc.),and finally the structural system meets the reliability requirements.