弹性边界条件下的索力测试研究
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摘要
频率法索力测试广泛地应用于索结构施工控制和健康监测中.由于索结构在实际工程中的多样性和复杂性,频率法的理论研究落后于工程实践.目前,一般考虑索的边界条件为固结或铰接,然而实际工程中的中索的边界并不是严格固结或者铰接,特别是对于短索,边界条件的影响不容忽视。基于此,本文采用数值模拟的方法求出索的边界支撑刚度,并用有限元数值拟合算法求解出频率所对应的索力值,为工程应用提供参考。
Cable force measurement with frequency method is widely used for construction controlling and healthy monitoring in cable structures.Due to the multiplicity and complexity of cable structures in application,the theoretical research of frequency method still lags behind engineering practice.At present,the considered boundary conditions are consolidation or articulation generally,but the cable's boundary conditions are not strict consolidation or articulation,especially for short cables,the impact of the boundary conditions can not be ignored.Based on these,in this paper,we use numerical simulation method to obtain cable's boundary supporting stiffness,and adopt finite element numerical fitting algorithm to solve cable force's value of the corresponding frequency,provide reference to practical application of engineering.
Cable force measurement with frequency method is widely used for construction controlling and healthy monitoring in cable structures.Due to the multiplicity and complexity of cable structures in application,the theoretical research of frequency method still lags behind engineering practice.At present,the considered boundary conditions are consolidation or articulation generally,but the cable's boundary conditions are not strict consolidation or articulation,especially for short cables,the impact of the boundary conditions can not be ignored.Based on these,in this paper,we use numerical simulation method to obtain cable's boundary supporting stiffness,and adopt finite element numerical fitting algorithm to solve cable force's value of the corresponding frequency,provide reference to practical application of engineering.
引文
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[5]王春苗,基于环境激励测试值的润扬悬索桥动力特性分析[J].公路交通科技,2006,(23)11:56-59.
[6]郭迅,李洪涛,王金国.某悬索桥振动特性现场测试及数值模拟[J].世界地震工程,2008,(24)3:1-6.
[2]段波,曾德荣,卢江.关于斜拉桥索力测定的分析[J].重庆交通学院学报,2005,24(4):6-9.
[3]吴文清,王成树,刘国昌,等.大跨度系杆拱桥柔性吊杆张力监测和参数识别研究[J].公路交通科技,2007,4(1):73.
[4]韦立林,谢开仲,秦荣.钢管混凝土拱桥吊杆索力测试与有限元分析[J].中外公路,2007,(27):66-69.
[5]王春苗,基于环境激励测试值的润扬悬索桥动力特性分析[J].公路交通科技,2006,(23)11:56-59.
[6]郭迅,李洪涛,王金国.某悬索桥振动特性现场测试及数值模拟[J].世界地震工程,2008,(24)3:1-6.
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