Structural System Identification of Buildings by a Wave Method Based on a Nonuniform Timoshenko Beam Model
Structural System Identification of Buildings by a Wave Method Based on a Nonuniform Timoshenko Beam Model
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基于非均匀Timoshenko梁模型的波法建筑物结构体系辨识
DOI：
10.1061/(asce)em.1943-7889.0000933
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Todorovska
中科院分区：
文献类型：
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作者：
M. Ebrahimian;M. Todorovska
摘要提出了一种沿高度分段恒定的建筑物非均匀Timoshenko梁模型，并给出了一种基于地震记录的结构体系识别算法。该模型考虑了剪切和弯曲变形、旋转惯性以及建筑物性能随高度的变化。通过在脉冲响应函数中匹配（在最小二乘意义上）传播脉冲来识别模型刚度参数。为了尽量减少土-结构相互作用的影响，拟合是在一个不包括基本振动模态的波段上进行的。该算法是建筑物结构健康监测波浪法的新发展，旨在用于地震警报系统，以便在地震后立即疏散决策，并用于一般状态监测。该模型还可用于地震预警系统的快速线性响应预测，以确定敏感设备在地震灾害中的安全停机。
AbstractA nonuniform Timoshenko beam model of a building, with piecewise constant properties along the height, is presented, along with an algorithm for structural system identification from earthquake records. The model accounts for shear and flexural deformation, rotatory inertia, and variation of building properties with height. The model stiffness parameters are identified by matching (in the least-squares sense) propagating pulses in impulse response functions. To minimize the effects of soil–structure interaction, the fit is performed on a band excluding the fundamental mode of vibration. This algorithm is a new development in a wave method for structural health monitoring of buildings, intended for use in seismic alert systems to facilitate decision making on evacuation immediately after the earthquake, and for general condition monitoring. The model can also be used with an earthquake early warning system for quick linear response prediction to decide on safe shutdown of sensitive equipment in adv...