摘要
利用 4块预应力混凝土空心板的动力测试数据 ,对板的支承条件和损伤参数进行了识别。根据板的损伤特征 ,以线弹性断裂力学为基础 ,推导了混凝土构件裂缝截面转动刚度表达式。然后利用特征值灵敏度分析和实测的固有频率变化率对裂缝的位置及裂缝程度进行了识别。
Using the dynamic experimental data of four prestress concrete hollow slabs,this paper presents the results of parameter identification on boundary conditions and damage states of the slabs. Based on linear fracture mechanics,the rotation stiffness formula of the cracking section in a concrete beam or slab is developed. Then the location and degree of a single crack in the slabs are identified by the eigenvalue sensitivity analysis and the increment of the measured frequencies.
出处
《振动工程学报》
EI
CSCD
北大核心
2002年第2期224-227,共4页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目 (编号 :5 99780 15 )
