| 钢筋混凝土截面损伤分析与检测 |
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| 引用本文： | 李淑春,刁波,郑晓宁,孙洋.钢筋混凝土截面损伤分析与检测[J].铁道科学与工程学报,2008,5(1):11-15. |
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| 作者姓名： | 李淑春 刁波 郑晓宁 孙洋 |
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| 作者单位： | 北京航空航天大学,土木工程系,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(50342015)，北京市自然科学基金资助项目(8052014)，国家教育振兴行动计划资助(BHB985-1-04) |
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| 摘 要： | 以平截面假定和截面力平衡关系为基础,导出钢筋混凝土双向压弯截面含损伤变量的割线刚度、切线刚度矩阵。将截面受压混凝土分成若干四边形,用高斯数值积分完成每个四边形的积分,截面含损伤变量的刚度等于各四边形积分之和。对截面进行了全过程损伤分析,并进行钢筋混凝土梁损伤试验,用冲击回波法检测垂直裂缝,试验检测结果与理论分析结果较吻合。
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| 关 键 词： | 损伤变量 钢筋混凝土结构 损伤分析 高斯积分 裂缝检测 |
| 文章编号： | 1672-7029(2008)01-0011-05 |
| 修稿时间： | 2007年8月28日 |
Damage evaluation and detection on reinforced concrete section |
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| LI Shu-chun,DIAO Bo,ZHENG Xiao-ning,SUN Yang.Damage evaluation and detection on reinforced concrete section[J].Journal of Railway Science and Engineering,2008,5(1):11-15. |
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| Authors: | LI Shu-chun DIAO Bo ZHENG Xiao-ning SUN Yang |
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| Abstract: | Based on the assumption of plane sections and cross-section force equilibrium equations,cross-section secant stiffness matrix and tangent stiffness matrix including damage variable subjected to biaxial bending were derived.The compression concrete cross-section was divided into several quadrangle regions,and integration of each quadrangle was completed by numerical Gauss integration.Geometric parameters of the cross-section stiffness matrices were calculated by addition all the quadrangles.Damage analysis of cross-section in loading history subjected to biaxial bending is completed and a simple-supported beam damage test under loading was investigated and detected cracks in the beam with impact echo method.Research indicates the theoretical results are agree well with the experimental data. |
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| Keywords: | damage variable reinforced concrete structure damage analysis Gauss integral crack detection |
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