[1]蔡建国,冯健,王蜂岚,等.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):1054-1058.[doi:10.3969/j.issn.1001-0505.2009.05.037]
 Cai Jianguo,Feng Jian,Wang Fenglan,et al.Structural analysis of precast concrete frames considering joint stiffness[J].Journal of Southeast University (Natural Science Edition),2009,39(5):1054-1058.[doi:10.3969/j.issn.1001-0505.2009.05.037]
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考虑节点刚度的预制混凝土框架结构分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第5期
页码:
1054-1058
栏目:
土木工程
出版日期:
2009-09-20

文章信息/Info

Title:
Structural analysis of precast concrete frames considering joint stiffness
作者:
蔡建国 冯健 王蜂岚 黄利锋
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
Author(s):
Cai Jianguo Feng Jian Wang Fenglan Huang Lifeng
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
预制混凝土 框架 节点刚度 半刚性连接 刚度系数
Keywords:
precast concrete frame joint stiffness semi-rigid connection stiffness coefficient
分类号:
TU375.4
DOI:
10.3969/j.issn.1001-0505.2009.05.037
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.
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 moment of beams and increase the moment at the mid-span of beams. The lateral stiffness of the frame structure increases as the joint stiffness increases. Moreover, the influence of joint stiffness on the structural lateral stiffness increases with an increase of the beam-column linear stiffness ratio. When the coefficient α, which is the ratio of flexural stiffness of beam to rational stiffness of joints, is over 5, the structural performance is similar to hinged-connected frames. The frame can be seen to be rigid connected while the coefficient α is less than 0.04. It can be concluded that the inner-force of the structure under vertical loads and the lateral stiffness of the frame are greatly influenced by the semi-rigid behavior of connection.

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备注/Memo

备注/Memo:
作者简介: 蔡建国(1984—),男,博士生; 冯健(联系人),男,博士,教授,博士生导师,fengjian@seu.edu.cn.
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(YBJJ0817).
引文格式: 蔡建国,冯健,王蜂岚,等.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):1054-1058. [doi:10.3969/j.issn.1001-0505.2009.05.037]
更新日期/Last Update: 2009-09-20