钢筋混凝土截面损伤分析与检测  

Damage evaluation and detection on reinforced concrete section

作　　者：李淑春[1] 刁波[1] 郑晓宁[1] 孙洋[1] 

机构地区：[1]北京航空航天大学土木工程系,北京100083

出　　处：《铁道科学与工程学报》2008年第1期11-15,共5页Journal of Railway Science and Engineering

基　　金：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)

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。Based on the assttmption 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.

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 

分 类 号：TU528.01[建筑科学—建筑技术科学]