摘要
木文就《建筑抗震设计规范》(GBJ 11-89)中关于底部剪力法的等效总重力荷载的规定提出问题。所谓等效总重力荷载,对于多质点体系来说,就是总重力荷载代表值乘以等效质量系数0.85。作者通过分析及实例计算指出,对二、三质点系来说,该系数偏低,尤其对二质点系偏低误差超过10％;并建议,对不等高单层厂房,用底部剪力法计算厂房的横向水平地震作用时,取等效质量系数为0.95。
In this paper, the author has found a problem concerning the stipu-lations of equivalent total gravity loads with base shear method that is stipu-lated in The Aseismic Design Code For Buildings(GBJ11-89). The equivalent total gravity load is defined by multiplying the total gravity load represen-tative value by equivalent mass coefficient 0.85 for multi-degree-of-freedom systems. On the basis of analyses and sample calculations, it is found that the coefficient of 0.85 is a little bit smaller for two and three-degree-of free-dom systems, especially, the difference is larger than 10 percent for two-degree-of freedom systems. The coefficient is proposed to be 0.95 when base shear method is used to calculate the horizontal earthquake effects for single-story factory building with different roof levels.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1992年第4期429-435,共7页
Journal of Tongji University:Natural Science
关键词
工业建筑
抗震加固
重力载荷
Earthquake effects
Base shear method
Mode-decomposition method
