鋼筋混凝土異形柱框架-斜撐結(jié)構(gòu)特性探討
陳 勤* 吳 暉 嚴(yán)士超
- 摘 要
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陳 勤* （清華大學(xué)土木系 北京 100084）吳 暉 嚴(yán)士超 （天津大學(xué)土木系 300072）[提要] 以K形斜撐為代表，采用桿系空間分析模型，通過對一批異形柱框架-斜撐結(jié)構(gòu)典型工程算例的系統(tǒng)理論分析，研究了地震作用下鋼筋混凝土異形柱框架-斜撐結(jié)構(gòu)的內(nèi)力分布規(guī)律、水平位移特性及自振特性。提出了白振周期的近似計(jì)算公式、斜撐與框架側(cè)移剛度比范圍及確定斜撐截面高度的公式，供工程實(shí)用參考。
[關(guān)鍵詞] 異形柱 框架-斜撐結(jié)構(gòu) 內(nèi)力分布 白振周期 側(cè)移剛度比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
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