余志武1   聂建国2   周凌宇1   刘小洁1

    （1 长沙铁道学院建工系 长沙 410075； 2 清华大学土木系 北京 100084）

[提要]  通过对国内69个构件和结构的试验资料的重新分析，提出了影响结构位移延性系数的主要因素：配箍特征值 β_v、名义剪跨比 λ、轴压比n和结构类型。通过回归分析，建议了适用于构件与结构的位移延性系数的通用经验公式，其计算结果与实测结果符合较好。
[关键词]  砼和预应力砼 框架 延性  回归分析

Through the reanalysis of the test data of sixty - nine members and structures at home, the principal factors affecting the displacement ductility factor of stucture such as stirrup reinforcement characteristic value β, nominal shear span ratio λ, axial compression ratio n and structural type are put forward.  Based on regression analysis, a general empirical formula suitable for displacement ductility factor of members and structure is also suggested. There is a good agreement between the calculated and test results.
Keywords: concrete;prestressed concrete; frame; ductility