摘要
文章结合一榀单层2跨预压装配式PC框架实验,考虑节点半刚性的影响,分析了预压装配式预应力混凝土框架延性系数的影响因素,导出预压装配式PC框架梁端截面屈服曲率表达式和极限曲率表达式,计算了梁端截面延性系数并与试验值进行比较;导出了预压装配式PC框架梁端满足承载力要求和使用要求的截面延性系数和弯矩调幅限值,考虑节点半刚性的影响和裂缝宽度限值的要求,给出了弯矩调幅限值建议公式以及弯矩调幅系数限值,为预压装配式框架的设计提供了理论基础。
Based on the experimental study of one-layer two-span prestressed precast concrete（PPC） frame, with the consideration of the influence of semi-rigid joints, the factors influencing the ductility coefficients of PPC frame are analyzed, the expressions of yielding and ultimate curvatures at the beam-end sections of PPC frame are derived, and the ductility coefficients at the beam-end sections are computed and compared with experimental results. Taking into consideration the influence of semi- rigid joints and the limits of crack width, the ductility coefficients and limit value of moment modifica- tion with satisfaction to the bearing capacity and operation requirements at the beam-end sections of PPC frame are deduced. The recommended limit value formulas and coefficient limits of moment modi- fication provide a theoretical basis for future design of PPC frame.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第11期1514-1518,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(50778060)
关键词
预压装配式框架
半刚性节点
弯矩调幅
prestressed precast concrete（PPC） frame
semi-rigid joint
moment modification
