摘要
针对规范计算长度系数法计算框架稳定时,无法考虑同层柱之间的相互支援以及层与层的支援作用的问题,提出一种基于挠度法求解有侧移框架临界力的计算方法.利用挠度法将求解压杆临界力转化为计算压杆挠度这一基本原理,将有侧移框架临界力的求解转化为计算框架的楼层侧移,推导了单层及多层框架结构临界力的计算公式.研究结果表明:算例计算结果和有限元计算结果符合较好,证明这种方法具有较好的精度及准确性,且能够有效地改进规范计算长度系数法无法考虑这两种支援作用的不足,可供工程设计和理论计算使用.
To solve the problem that the standardized effective length method could not consider the mutual support between the same layer columns and the inter-story interaction,a calculation method based on the deflection method for solving the critical force of sway frame was proposed.According to the basic principle that the deflection method could convert the critical force of the pressure bar into calculating the deflection of the pressure bar,the solution of the critical force of sway frame was transformed into the calculation of the lateral displacement of sway frame,and some formulas for calculating the critical force of the single-layer and multi-layer frame were derived.Research results show that the final calculation results are in good agreement with finite element data,indicating good precision and accuracy of this method,which can improve the deficiency of the standardized effective length method,and can be used for engineering design and theoretical calculations.
作者
兰树伟
周东华
双超
LAN Shuwei;ZHOU Donghua;SHUANG Chao(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第5期122-127,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51668027
51468026)
关键词
挠度法
整体稳定
反弯点
临界力
计算长度系数
deflection method
overall stability
inflection point
critical force
effective length factor
