A non-destructive method for damage detection in steel-concrete structures based on finite eigendata
A non-destructive method for damage detection in steel-concrete structures based on finite eigendata
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DOI：
10.1080/17415977.2011.605884
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发表时间：
2012-03
影响因子：
1.3
通讯作者：
S. Jimbo;A. Morassi;G. Nakamura;K. Shirota
中科院分区：
文献类型：
--
作者：
S. Jimbo;A. Morassi;G. Nakamura;K. Shirota
本文提出了一种基于有限谱数据和给定边界条件的钢-混凝土组合梁损伤检测方法。反问题包括确定钢梁和混凝土梁之间连接的两个刚度系数。反问题转化为一个成本函数，其中包括本征值数据和横向位移的特征函数的变分问题。提出了一种利用特征值和特征函数的一阶偏导数的解析表达式来识别未知系数的投影梯度法。对真实的钢-混凝土梁进行了一系列数值模拟，并对结果进行了讨论。
This article proposes a non-destructive method for damage detection in steel-concrete beams based on finite spectral data associated with a given set of boundary conditions. The inverse problem consists of determining two stiffness coefficients of the connection between the steel beam and the concrete beam. The inverse problem is transformed to a variational problem for a cost function which includes eigenvalue data and transversal displacements of eigenfunctions. A projected gradient method which uses the analytical expressions of the first partial derivatives of the eigenvalues and eigenfunctions is proposed for identifying the unknown coefficients. The results of an extended series of numerical simulations on real steel-concrete beams are presented and discussed.