[1]卢锦钟,黄晓吉.梁端约束对钢筋混凝土梁耐火性能的影响[J].华侨大学学报(自然科学版),2008,29(4):593-599.[doi:10.11830/ISSN.1000-5013.2008.04.0593]
　LU Jin-zhong,HUANG Xiao-ji.Effect of Restraint Stiffness on the Fire Resistance of Reinforced Concrete Beam[J].Journal of Huaqiao University(Natural Science),2008,29(4):593-599.[doi:10.11830/ISSN.1000-5013.2008.04.0593]
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梁端约束对钢筋混凝土梁耐火性能的影响()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第29卷
期数:
2008年第4期
页码:
593-599
栏目:
出版日期:
2008-10-20

文章信息/Info

Title:
Effect of Restraint Stiffness on the Fire Resistance of Reinforced Concrete Beam
文章编号:
1000-5013(2008)04-0593-07
作者:
卢锦钟; 黄晓吉
华南理工大学亚热带建筑科学国家重点实验室; 华东交通大学土木建筑学院
Author(s):
LU Jin-zhong1;  HUANG Xiao-ji2
1.State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China; 2.School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China
关键词:
钢筋混凝土梁;  轴向约束;  转动约束;  耐火极限
Keywords:
reinforced concrete beam;  axial restraint;  rotational restraint;  fire resistance
分类号:
TU375.1
DOI:
10.11830/ISSN.1000-5013.2008.04.0593
文献标志码:
A
摘要:
利用已编制的钢筋混凝土结构高温反应的全过程分析程序,通过带有杆端约束的钢筋混凝土梁的耐火极限分析,初步探讨轴向约束刚度比、转动约束刚度比和高跨比对梁的耐火性能的影响规律.研究表明,转动约束刚度比不变时,随着轴向约束刚度比的增大,梁的耐火极限逐渐减少,当轴向约束刚度比增大到一定程度时,这一趋势逐渐减缓; 轴向约束刚度比不变时,随着转动约束刚度比的增大,梁的耐火极限逐渐增大,当转动约束刚度比增大到一定程度时,这一趋势逐渐减缓; 随着高跨比的减少,梁的耐火时间逐渐减少.
Abstract:
A computer program considering geometrical nonlinearity for reinforced concrete structure subjected to high temperature is used,the reliability of the program is validated by the existed experimental results.A reinforced concrete beam with restraint stiffness is selected for the fire endurance analysis,the effect of the axial and rotational restraint stiffness ratios,and the height-span ratio on the fire resistance of the reinforced concrete beam is primarily studied.Simulation results show that for a constant ratio of rotational restrained stiffness,with increasing the ratio of axial restraint stiffness,the fire resistance of beam decreases,and this trend slows down as the axial restraint stiffness increases to a certain value; for a constant ratio of axial restraint stiffness,with increasing the ratio of rotational restraint stiffness,the fire resistance of beam increases,and this trend also slows down as the rotational restraint stiffness increases to a certain value; with decreasing the height-span ratio,the fire resistance of beam decreases.

参考文献/References:

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备注/Memo

备注/Memo:
国家自然科学基金资助项目(50478078); 教育部新世纪优秀人才支持计划(NCET-04-0819)
更新日期/Last Update: 2014-03-23