考虑施工过程任意截面偏压构件收缩徐变分析

华南理工大学学报（自然科学版） ›› 2005, Vol. 33 ›› Issue (1): 21-26.

考虑施工过程任意截面偏压构件收缩徐变分析

邓志恒秦荣王晓燕

广西大学土木工程学院，广西南宁 530004

收稿日期:2004-03-24 出版日期:2005-01-25 发布日期:2005-01-25
通信作者: 邓志恒(1963-)，男，博士，教授，主要从事混凝土结构方面的研究 E-mail:dengzh@gxu.edu.cn
作者简介:邓志恒(1963-)，男，博士，教授，主要从事混凝土结构方面的研究
基金资助:
国家自然科学基金资助项目(5006811)；广西自然科学基金资助项目(0135049)

Analysis of Shrinkage Creep Eccentrically-Compressed M embers of Arbitrary Cross-Section Considering Construction Process

Deng Zhi-heng Qin Rong Wang Xiao-yan

Civil Engineering College,Guangxi Univ.,Nanning 530004,Guangxi,China

Received:2004-03-24 Online:2005-01-25 Published:2005-01-25
Contact: 邓志恒(1963-)，男，博士，教授，主要从事混凝土结构方面的研究 E-mail:dengzh@gxu.edu.cn
About author:邓志恒(1963-)，男，博士，教授，主要从事混凝土结构方面的研究
Supported by:
国家自然科学基金资助项目(5006811)；广西自然科学基金资助项目(0135049)

摘要/Abstract

摘要： 将施工过程引入任意截面偏心受压构件收缩徐变的计算分析，考虑偏心受压构件轴力变化、混凝土弹性模量变化、环境的变化及配筋率对截面内力重分布的影响，利用混凝土徐变中值系数和混凝土弹性模量中值系数，推导出了任意截面偏心受压构件收缩徐变的计算公式，最后对一实际工程进行了施工过程混凝土收缩徐变跟踪测试．结果表明，考虑施工过程与不考虑施工过程的计算结果有较大的差别，所提出的计算公式与实测结果较相符，符合实际受力模型，可供工程设计参考．

关键词: 施工过程, 偏压构件, 收缩徐变

Abstract:

The formulas to calculate the shrinkage creep of arbitrary cross-section eccentrically-compressed men-bers were deduced in this paper,during which,besides the process of construction,the influences of the axial force variation,the concrete elasticity modulus variation and the change of circumstance and the reinforcement ratio on the stress redistribution in the cross-section were considered,and the median coefficients of concrete creep and con-crete elastic modulus were employed.The track test of the shrinkage creep in an actual project was then carried out.The results indicate that there is great difference between the calculated results with and without considering the construction process,that the theoretically calculated results accord well with the practical ones,and that the proposed calculation form ulas are in good a~eement with the practical bearing model,thus providing references to the design of actual projects.

Key words: construction process, eccentrically-compressed member, shrinkage creep

邓志恒秦荣王晓燕. 考虑施工过程任意截面偏压构件收缩徐变分析[J]. 华南理工大学学报（自然科学版）, 2005, 33(1): 21-26.

Deng Zhi-heng Qin Rong Wang Xiao-yan. Analysis of Shrinkage Creep Eccentrically-Compressed M embers of Arbitrary Cross-Section Considering Construction Process[J]. Journal of South China University of Technology (Natural Science Edition), 2005, 33(1): 21-26.