摘要
提出了一种以加载试验数据和结构有限元模型修正理论为基础的梁体刚度参数识别方法。以某国道一简支变连续桥梁预制小箱梁为对象,在分析其受力特点的基础上,进行了试验测试参数的确定及修正参数的选择,然后,以试验结果为依据进行了分析模型的参数修正;通过比较采用设计假定参数、修正后参数下理论计算结果与试验结果的差异,表明以设计假定参数计算值与试验值存在较大的偏差,而采用识别的刚度参数计算值与试验值则吻合较好,验证了所建立的方法的合理性。
A method to identify the stiffness parameters of beams based on the loading test data and the theory of structural finite element model modification was proposed in this paper.The analysis object was a prefabricated box girder of a simply supported continuous bridge of a national road.Based on the analysis of its stress characteristics,the determination of test parameters and the selection of correction parameters were carried out.Then,based on the test results,the parameters of the model are modified.By compared the difference between the theoretical calculation results and the test results under the design assumed parameters and the modified parameters,it is shown that there is a big deviation between the calculated values with the design assumed parameters and the test values,while the calculated values with the identified stiffness parameters are in good agreement with the test values,which verifies the rationality of the established method.
作者
董立军
赵莉弘
王建民
DONG Lijun;ZHAO Lihong;WANG Jianmin(Highway Management Office of Balinyou Banner County,Chifeng,024000,China;Beijing Jiaotong Vocational Technical College,Beijing,100096,China;School of Civil Engineering,Tsinghua University,Beijing,100084,China)
出处
《华北科技学院学报》
2019年第5期86-90,共5页
Journal of North China Institute of Science and Technology
关键词
桥梁工程
小箱梁
挠度
有限元修正
刚度识别
bridge engineering
box girder
deflection
finite element correction
stiffness identification
