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[1]许晶,贡金鑫.钢筋混凝土偏心受压构件二阶效应计算对比分析[J].建筑科学与工程学报,2010,27(03):65-77.
　XU Jing,GONG Jin-xin.Comparative Analysis of Second-order Effect on Eccentrically Compressed Reinforced Concrete Member[J].Journal of Architecture and Civil Engineering,2010,27(03):65-77.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
27卷
期数:
2010年03期
页码:
65-77
栏目:
出版日期:
2010-09-20

文章信息/Info

Title:
Comparative Analysis of Second-order Effect on Eccentrically Compressed Reinforced Concrete Member
作者:
许晶,贡金鑫
大连理工大学 建设工程学部,辽宁 大连 116024
Author(s):
XU Jing, GONG Jin-xin
Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
关键词:
结构工程;  钢筋混凝土构件;  二阶效应;  弯矩;  轴力;  承载力
Keywords:
structural engineering;  reinforced concrete member;  second-order effect;  moment;  axial force;  bearing capacity
分类号:
TU375.1
DOI:
-
文献标志码:
A
摘要:
根据钢筋混凝土偏心受压构件的受力状态,推导出了构件截面受压承载力计算时相关参数的计算公式,由此得出了不同配筋率与不同钢筋和混凝土强度比时中国规范GB 50010—2002、美国规范ACI 318-08和欧洲规范EN 1992-1-1:2004的构件截面弯矩-轴力曲线; 在此基础上,根据中国混凝土规范中的偏心距增大系数法、美国混凝土规范的弯矩增大系数法和欧洲混凝土规范的基于名义刚度及名义曲率的方法分析考虑二阶效应的承载力,给出了不同长细比时偏心受压构件的弯矩-轴力曲线。分析结果表明:对于混凝土偏心受压构件的二阶效应,中国混凝土规范主要考虑了构件长细比的影响,美国规范考虑了构件端部弯矩、刚度和长细比的影响,欧洲规范考虑了构件长细比、曲率和端部弯矩的影响; 对于构件两端偏心距相同的情况,按中国、美国和欧洲混凝土规范计算的承载力均随长细比的增大而降低,美国规范下降最快,欧洲规范次之,中国规范下降最慢。
Abstract:
The calculation formulas used for ultimate force state design of eccentrically compressed reinforced concrete members were derived. The sectional interactive relations of moment and axial force of members with different reinforcement ratios of steel bars and strength ratios of steel to concrete were calculated according to Chinese Code GB 50010—2002, American Code ACI 318-08 and European Code EN 1992-1-1:2004. Based on it, the corresponding interaction diagrams of moment and axial force of members with different slenderness ratios were obtained, taking second-order effects into account in different methods in the three codes, i.e., increased eccentricity method in Chinese Code, moment magnifier coefficient method in American Code, as well as methods based on nominal stiffness and nominal curvature in European Code. Analysis results show that different aspects are considered to analyze the second-order effects of eccentrically compressed reinforced concrete members in the three codes. End moments, stiffness and slenderness ratios of member are considered in American Code, and slenderness ratios, curvature, as well as end moments are considered in European Code. The bearing capacities of members decrease with increase of slenderness ratio subjected to the same end moments, but the calculated results based on the three codes are different, the sharpest decline is American Code, and the minimum is Chinese Code.

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备注/Memo

备注/Memo:
收稿日期:2010-06-21
基金项目:“十一五”国家科技支撑计划项目(2006BAJ01B06-06)
作者简介:许 晶(1985-),女,河北邢台人,工学博士研究生,E-mail:dream5603@sina.com。
更新日期/Last Update: 2010-09-20