组合框架梁刚度增大系数取值研究  

Research on Stiffness Amplified Coefficient of Composite Frame Beam

作　　者：范重[1] 程竞[1,2] 

机构地区：[1]中国建筑设计研究院,北京100044 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《建筑科学与工程学报》2014年第1期98-103,110,共7页Journal of Architecture and Civil Engineering

基　　金：科学技术部科研院所技术开发研究专项基金项目(22012201)

摘　　要：分析了钢框架-混凝土核心筒混合结构中组合框架梁正弯矩区截面抗弯刚度增大系数的变化范围和负弯矩区楼板翼缘有效宽度范围内钢筋对梁截面惯性矩的增大效果,对受力状态与组合框架梁负弯矩区长度的关系进行了深入研究,提出了变刚度组合框架梁刚度增大系数的计算方法,探讨了各种因素对混合结构中组合框架梁刚度增大系数的影响,并给出了混合结构设计时框架梁刚度增大系数的取值建议。T he changing zone of stiffness amplified coefficient of composite frame beam in positive moment area in steel frame-concrete core wall mixed structure was studied ,and the increasing effects on moment of inertia within flange effective width in negative moment area were analyzed . The relations of force state and negative moment zone length of composite frame beam were focused deeply ,the calculation method of stiffness amplified coefficient of variable stiffness frame beam was proposed , and the effects of various factors on stiffness amplified coefficient of composite frame beam were discussed . At last , the proposed value of stiffness amplified coefficient of composite frame beam in mixed structure design was presented .

关 键 词：钢框架-混凝土核心筒混合结构 组合框架梁 负弯矩区 弯矩比 刚度增大系数 

分 类 号：TU398.9[建筑科学—结构工程]