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中南大学学报(自然科学版)

Journal of Central South University

第48卷    第11期    总第279期    2017年11月

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文章编号:1672-7207(2017)11-3013-10
半刚性组合框架骨架曲线实用计算方法
潘建荣1, 2,杨正挺1,王湛1, 2,陈士哲1

(1. 华南理工大学 土木与交通学院,广东 广州,510640; 2. 华南理工大学 亚热带建筑科学国家重点实验室,广东 广州,510640)

摘 要: 针对组合节点的弯矩-转角计算模型以及组合框架骨架曲线计算模型忽略节点半刚性的问题,探讨组合节点转动刚度和半刚性组合框架骨架曲线的计算方法。基于参数相关性,运用改进的参数灵敏度分析方法,研究外加强环式钢管混凝土柱-钢梁节点的转动刚度。应用二阶分析推导柔性梁柱单元的刚度矩阵;应用得出的节点转动刚度计算模型推导半刚性组合框架骨架曲线的简化计算模型。研究结果表明:改进后的灵敏度分析方法得出的节点参数灵敏度更高。节点半刚性可降低骨架曲线的弹性刚度和下降段斜率。引入节点半刚性的骨架曲线计算模型更加符合组合框架的实际工作性能。

 

关键词: 半刚性;灵敏度分析;弯矩-转角曲线;组合框架;骨架曲线计算模型

Simplified practical calculation method of skeleton curve of semi-rigid composite frame
PAN Jianrong1, 2, YANG Zhengting1, WANG Zhan1, 2, CHEN Shizhe1

1. Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China; 2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China

Abstract:In view of the calculation model of moment-rotation for composite joints and the composite frame skeleton curve model in which the semi-rigid of the joints is neglected, the calculation methods of the rotational stiffness of the joint and the skeleton curve of the semi-rigid composite frame were investigated. Based on parameter correlation, the parameters sensitivity of outer strengthening ring joint of steel beam to concrete filled steel tubes (CFST) column stiffness were studied by using improved sensitivity analysis method. The stiffness matrix of flexible beam column element was deduced. The calculation model of the moment-rotation curve of the joints was simplified and used to deduce the semi-rigid composite frame. The results show that the improved sensitivity analysis method is more accurate in obtaining the sensitivity of the joint parameters. The semi-rigid joints can decrease the elastic stiffness and slope of the skeleton curve. The skeleton curve model in which semi-rigid joints is introduced is more in line with the actual working performance of the composite frame.

 

Key words: semi-rigid; sensitivity analysis; moment-rotation curve; composite frame; skeleton curve model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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