低周反复荷载作用下钢筋混凝土异形柱框架的延性分析

Ductility analysis of reinforced concrete special-shaped column frame under low reversed cyclic loading

通过对一榀异形柱框架的低周反复试验,研究了框架在水平反复荷载作用下的位移延性及在竖向荷载作用下框架柱截面曲率的延性性能,分析了框架柱柱脚截面曲率延性与结构位移延性的关系,给出了异形柱截面极限曲率的确定方法,分析了延性对框架抗震性能的影响,针对提高异形柱框架的延性提出了相应的建议。结果表明:框架拥有良好的延性。

Based on the low reversed cyclic loading test of one common frame with special - shaped columns, the paper reveals the displacement ductility of frame under horizontal load and the curvature ductility performance under the vertical load of frame columnsection. It analyzes curvature ductility and the relationship between the displacementductility of the structure of frame column foot section, giving the limiting curvature method of special - shaped columns section determination. It also analyzes the ductility＇ s influence on seismic performance of frame structure, and corresponding suggestions are given to improve the ductility of the special -shaped column frame. The results show that the framework has good ductility.