【摘要】 根据试验资料,分析了钢筋混凝土构件在分级荷载作用下开裂及裂纹的演化、分布特性,证明了钢筋混凝土构件表面裂缝分布具有分形性质,并且不同损伤状态下构件表面裂缝的分维数与其动力特性参数之间具有良好的负线性相关关系。研究表明该分维数可作为钢筋混凝土构件损伤程度的衡量指标,从而为钢筋混凝土结构无损检测和剩余寿命评价提供了新的思路和方法。更多还原

【Abstract】 In this paper,through the analysis of crack propagation based on the experimental data,it is verified that the surface cracks on the reinforced concrete members take on the fractal behavior and there is a very good minus linear correlative relation between the fractal dimension of the cracks on the R.C members and its dynamical characteristic parameter under different damage conditions.Accordingly,the fractal dimension can be regarded as an index to evaluate damage degree of the R.C members,which provides a novel method for non-damage detection and residual life evaluation of concrete structures.更多还原