钢筋混凝土异形柱框架-斜撑结构特性探讨
- 摘 要
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陈 勤* （清华大学土木系 北京 100084）吴 晖 严士超 （天津大学土木系 300072）[提要] 以K形斜撑为代表，采用杆系空间分析模型，通过对一批异形柱框架-斜撑结构典型工程算例的系统理论分析，研究了地震作用下钢筋混凝土异形柱框架-斜撑结构的内力分布规律、水平位移特性及自振特性。提出了白振周期的近似计算公式、斜撑与框架侧移刚度比范围及确定斜撑截面高度的公式，供工程实用参考。
[关键词] 异形柱 框架-斜撑结构 内力分布 白振周期 侧移刚度比Based on the theoretical analysis of a set of representative examples of frame with R.C special-shaped column-K-shaped bracing system, by using 3-dimensional analysis modei of bar system, the regularity of inner force distribution, characteristics of horizontal displacement and vibration characteristics of frame with R.C special-shaped column-bracing system are stuclied. The approximate formula of vibration period, the range of stiffness ratio of bracing to frame and the formula to determine the depth of bracing cross-section are proposed, which are of practical engineering values.
Keywords: frame; R.C special-shaped column-bracing system; regularity; inner force distribution; vibration period; stiffness ratio of bracing to frame
