摘要
介绍了GB 50017—2017《钢结构设计标准》中多高层钢结构稳定计算的思路。首先,回顾了压杆弹性屈曲的欧拉公式,通过分析摇摆柱-悬臂柱体系、设置摇摆柱的框架和防屈曲支撑的构成,表明了压杆自身刚度和相邻构件的刚度为压杆本身、摇摆柱、芯杆提供了稳定承载力。然后,将这些概念推广到双重抗侧力结构中,则支撑架为框架提供了支持,因此要求支撑架在框架柱达到极限状态时应具有刚度。
The idea of stability calculation of multi-story steel structure in GB 50017—2017 was introduced. Firstly, the Euler’s formula of elastic buckling of the struts was reviewed. By analyzing the structure of the leaning column-cantilever column system, the frame of the leaning column, and the buckling-restrained brace, it was shown that the stiffness of the struts and the stiffness of the adjacent members provided the stability capacity for the strut itself, the leaning column, and the core rod. These observations were extended to the dual lateral resisting structure, if the buckling capacity of frames in the system was required to be enhanced by bracing, the bracing should possess some residual elastic stiffness at the moment of frame buckling.
作者
童根树
TONG Genshu(Institute of High-Performance Structures and Materials,Zhejiang University,Hangzhou 310023,China)
出处
《钢结构》
2019年第1期86-87,68,共3页
Steel Construction
关键词
框架稳定
双重抗侧力结构
刚度
摇摆柱
frame stability
dual lateral resisting structure
stiffness
leaning column
