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（清華大學(xué)土木系結(jié)構(gòu)工程與振動教育部重點實驗室  北京 100084）

［提要］  建立了鋼筋混凝土（RC）柱屈服位移角和極限位移角的計算式，對141個試件的試驗數(shù)據(jù)進行分析，得到了計算式的相關(guān)參數(shù)。RC柱的屈服位移角與受拉鋼筋屈服強度、柱截面高度和軸壓比有關(guān)，極限位移角與軸壓比、配箍特征值、剪跨比等有關(guān)，與縱筋配筋率關(guān)系不大。提出了RC柱基于位移的變形能力設(shè)計方法。

［關(guān)鍵詞］  鋼筋混凝土柱  基于位移抗震設(shè)計  屈服位移角  極限位移角  變形能力

Displacementbased Deformation Capacity Design of RC Columns/Qian Jiaru, Xu Fujiang（Key Laboratory for Structural Eng. and Vibration of the Ministry of Education, Department of Civil Engineering, Tsinghua Univ., Beijing 100084,China）

Abstract:A model is developed to predict the drift ratios of reinforced concrete columns at yielding and at ultimate respectively, and a set of test data is used for regression analysis of the model, and expressions for the drift ratio of RC columns are evaluated. The drift ratio of RC columns at yielding is related to the yielding strength of longitudinal bars, depth of column cross section and axial force ratio. The drift ratio of RC columns at ultimate is related to axial force ratio, stirrup characteristic value and shearspan ratio, and has little to do with the longitudinal reinforcement ratio. According to the expression of drift of RC column at ultimate, displacementbased deformation capacity design method of RC columns is proposed.