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考虑节点刚度的预制混凝土框架结构分析
引用本文:蔡建国,冯健,王蜂岚,黄利锋.考虑节点刚度的预制混凝土框架结构分析[J].东南大学学报(自然科学版),2009,39(5).
作者姓名:蔡建国  冯健  王蜂岚  黄利锋
作者单位:东南大学混凝土及预应力混凝土结构教育部重点实验室,南京,210096
基金项目:江苏省建设系统科技招标资助项目、东南大学优秀博士学位论文基金资助项目 
摘    要:给出了考虑节点刚度的框架梁的力学模型,推导了用节点连接刚度系数表示的半刚接梁的单元刚度矩阵,以及半刚接梁在荷载作用下的内力计算公式,并利用位移法对一单层单跨框架结构的横梁弯矩及其抗侧刚度进行了讨论.算例结果表明:半刚性连接框架受连接柔性的影响,会使框架结构横梁的杆端弯矩减小,而跨中弯矩增加;结构整体的抗侧刚度则随着节点转动刚度的增加而增加;随着梁柱线刚度比的增加,节点刚度对结构抗侧刚度的影响也随之增大.当梁的线刚度与节点转动刚度的比值α>5,结构受力性能与节点铰接时相近,而当α<0.04时,节点连接可视为刚接.综上所述,节点转动刚度对结构在竖向荷载作用下的内力以及结构整体的抗侧刚度有较大的影响.

关 键 词:预制混凝土  框架  节点刚度  半刚性连接  刚度系数

Structural analysis of precast concrete frames considering joint stiffness
Cai Jianguo,Feng Jian,Wang Fenglan,Huang Lifeng.Structural analysis of precast concrete frames considering joint stiffness[J].Journal of Southeast University(Natural Science Edition),2009,39(5).
Authors:Cai Jianguo  Feng Jian  Wang Fenglan  Huang Lifeng
Institution:Cai Jianguo Feng Jian Wang Fenglan Huang Lifeng(Key Laboratory of Concrete , Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China)
Abstract:A mechanics model for the frame beam with considering joint stiffness is presented in this paper.The beam element stiffness matrix by the joint connection stiffness coefficient is given.And internal forces of beams with semi-rigid connections under external loads are also obtained.Then the moments of beams and lateral stiffness of a frame structure with one span and one story are discussed.The results show that the flexibility of the connections affects the behavior of the frame,it can decrease the end mome...
Keywords:precast concrete  frame  joint stiffness  semi-rigid connection  stiffness coefficient  
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