地震荷载作用下钢筋混凝土柱的滑移变形

Study on Slip Deformation of Reinforced Concrete Column under Seismic Loading

根据钢筋滑移的受力变形原理和Alsiwat-Saatcioglu模型假定推导出钢筋的显式表达式;基于转动弹簧模型和滑移截面模型,阐述了由滑移量-应力关系确定柱端弯矩-转角和构件的荷载-滑移变形关系的理论方法;开发了该方法相应的计算程序对上述两种模型的适用性进行了评定,结果表明采用滑移截面模型得到的钢筋混凝土柱构件荷载-滑移变形反应比转动弹簧模型更为准确.

Expression of steel slip-stress is derived according to load-deformation principle of steel slip and calculation assumption of Alsiwat-Saatcioglu model. Based on rotational spring model and bar-slip fiber section model,a theoretical approach is given for the relationship of moment-rotation of end column and load-slip deformation of component. The calculating program is developed to evaluate the model adaptability. Comparison of the numerical results and experiment results validate that the load-slip deformation characteristics of reinforced concrete column component is more accurate by using adopted bar-slip fiber section model than rotational spring model.