摘要
设置了支撑架的框架结构,当支撑刚度还不足以使框架柱可按无侧移框架确定计算长度时,如何确定框架柱的计算长度问题,本文对此进行了研究,提出了计算公式.本文还提出了使框架柱可按无侧移计算稳定性的支撑门槛刚度.适当考虑结构初始缺陷和侧向荷载的影响后,此刚度可作为确定框架柱计算长度时区分有侧移和无侧移框架的合理标准.
This paper investigates the buckling of frames with braces whose stiffness is not great e-nough to make frames buckle in nonsway mode. Formula is presented to calculate the column effective length in these partially braced frames. Threshold stiffnesses of the braces which is just to make frame buckling loads equal to those in nonsway buckling mode are obtained. After considering the effects of initial imperfections and lateral loads, the brace threshold stiffness may be used as a rational basis to distinguish between sway frames and nonsway frames.
出处
《土木工程学报》
EI
CSCD
北大核心
1998年第4期31-37,共7页
China Civil Engineering Journal
