[1]蒋凤昌,朱慈勉.混凝土柱中箍筋锈蚀影响纵筋压屈行为分析[J].东南大学学报(自然科学版),2008,38(2):279-282.[doi:10.3969/j.issn.1001-0505.2008.02.019]
 Jiang Fengchang,Zhu Cimian.Analysis of buckling behavior of longitudinal bars affected by stirrup corrosion in concrete columns[J].Journal of Southeast University (Natural Science Edition),2008,38(2):279-282.[doi:10.3969/j.issn.1001-0505.2008.02.019]
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混凝土柱中箍筋锈蚀影响纵筋压屈行为分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第2期
页码:
279-282
栏目:
土木工程
出版日期:
2008-03-20

文章信息/Info

Title:
Analysis of buckling behavior of longitudinal bars affected by stirrup corrosion in concrete columns
作者:
蒋凤昌 朱慈勉
同济大学土木工程学院, 上海 200092
Author(s):
Jiang Fengchang Zhu Cimian
College of Civil Engineering, Tongji University, Shanghai 200092, China
关键词:
箍筋锈蚀 纵向钢筋 压屈行为 剩余承载力 评估
Keywords:
stirrup corrosion longitudinal reinforcing bars buckling behavior residual capacity estimation
分类号:
TU375.3
DOI:
10.3969/j.issn.1001-0505.2008.02.019
摘要:
为了估算箍筋锈蚀对混凝土柱剩余承载力的影响,利用能量原理推导了锈蚀箍筋抗拉刚度和锈蚀纵筋抗弯刚度退化情况下纵筋压屈模态的计算模型; 列出了锈蚀纵筋压屈的1阶、2阶和3阶模态所对应的临界刚度系数Kcr,n; 提出了根据箍筋锈蚀率推断纵筋压屈模态的判别式,其理论计算结果与计算机仿真试验结果能很好吻合.基于197根锈蚀钢筋的压屈试验,建立了锈蚀纵筋压屈模态与承载力之间的函数关系.所提出的计算模型可为既有混凝土柱剩余承载力评估中考虑箍筋锈蚀因素提供依据.
Abstract:
To estimate the influence of stirrup corrosion on the residual capacity of concrete columns, a buckling calculation model of the longitudinal bars is presented using energy principles, considering the degeneration effect of tensile stiffness of corroded stirrups and flexural rigidity of corroded longitudinal bars. Corresponding with buckling models(one-order, two-order and three-order)of corroded longitudinal bars, critical stiffness coefficients Kcr,n are listed. A corrosion ratio related discriminating formula is proposed to determine buckling model, and its effectiveness has been confirmed by the computer-simulating experiment. The relation between buckling mode and bearing capacity of longitudinal bars is established on the basis of a series of buckling experiments containing 197 specimens. The proposed calculation model can provide reliable reference in the residual capacity estimation for existed concrete columns containing stirrup corrosion.

参考文献/References:

[1] 张誉,蒋利学,张伟平,等.混凝土结构耐久性概论[M].上海:上海科学技术出版社,2003.
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备注/Memo

备注/Memo:
作者简介: 蒋凤昌(1970—),男,博士生,讲师; 朱慈勉(联系人),男,博士,教授,博士生导师,zcm@mail.tongji.edu.cn.
基金项目: 国家自然科学基金资助项目(50508028)、“青蓝工程”优秀青年骨干教师培养基金资助项目(2006-2009).
引文格式: 蒋凤昌,朱慈勉.混凝土柱中箍筋锈蚀影响纵筋压屈行为分析[J].东南大学学报:自然科学版,2008,38(2):279-282.
更新日期/Last Update: 2008-03-20