摘要
通过取样检测 ,系统分析了钢筋锈蚀形状变化特征、混凝土表面裂纹宽度变化特征 ;在取样检测分析的基础上 ,给出了钢筋锈蚀层椭圆外轮廓线数学模型和相应的任一点锈蚀层厚度的计算公式 ;然后依据三个基本假定 ,给出锈蚀层虚拟边界位移离散化力学模型和相应的虚拟边界位移解和虚拟边界应力解 ;最后在虚拟边界位移条件下 ,用数值流形元法模拟了二类锈胀随服役时间变化引起裂纹扩展轨迹的问题 。
Both a model for the contour of corrosion layer and a formula for the rust thickness are proposed in the paper It is found that the contour is varied in an ellipse shape based on the in?site measured data Three assumptions are made to get the solution of displacements and stresses varied with different boundary At last,two kinds of the corrosion induced crack propagation are solved by the numerical manifold method It is in the state of fictitious displacement boundary varied with time It is found that the result is agreed with the test one
出处
《土木工程学报》
EI
CSCD
北大核心
2003年第2期1-5,共5页
China Civil Engineering Journal
关键词
钢筋混凝土结构
腐蚀
损伤
虚拟边界
位移条件
数值流形元法
裂纹扩展
corrosion layer,model,fictitious boundary,displacement condition,numerical manifold method,crack propagation
