Park-Ang三维损伤模型的参数确定和性能等级划分  

Parameter identification and performance classification for the three-dimensional Park-Ang damage model

作　　者：郭进[1] 王君杰[1] 韩鹏[1] 王文彪[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《哈尔滨工程大学学报》2014年第11期1332-1338,共7页Journal of Harbin Engineering University

基　　金：国家973计划资助项目(2013CB036300);国家自然科学基金资助项目(51278373);贵州省科技厅黔科合重大专项基金资助项目(字【2011】6014)

摘　　要：针对Park-Ang三维损伤模型的参数取值和性能等级划分研究不足,基于试验数据,通过2轮遍历搜索,确定了参数取值;并参照已有的性能等级划分,确定了适用于Park-Ang三维损伤模型的性能等级划分标准。用一组一维试验验证了参数取值和性能等级划分对于不同加载路径的适用性;用另一组试验验证了它们对于空间受力构件的适用性。结果表明:所确定的参数和性能等级划分标准与已有的Park-Ang三维损伤模型表达式共同组成了一个完整的损伤指标,这一指标能够较好地评价不同一维加载模式或空间受力构件的损伤。The selection of parameter values and definition of damage levels for the three-dimensional Park-Ang damage are not available in the existing literature. The parameters are determined based on the test data through two traversal searches. According to the existing performance levels classification method, the damage limit values for the three-dimensional Park-Ang damage model were determined. The applicability of the parameter values selection and damage levels for specimens in different loading paths is verified based on one set of one-dimensional tests. Their applicability for specimens under special force is verified based on another set of tests. The results showed that the ascertained parameters and damage levels form a complete set of damage indicators together with the expression of the existing three-dimensional Park-Ang damage model. With this damage model, damage can be accurately evaluated for structural members in different one-dimensional loading paths or spatial force.

关 键 词：Park-Ang三维损伤模型 参数确定 性能等级 遍历搜索 加载路径 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]