Robustness analysis of elastoplastic structure subjected to double impulse
Robustness analysis of elastoplastic structure subjected to double impulse
复制标题
双脉冲作用下弹塑性结构的鲁棒性分析
DOI：
10.1016/j.jsv.2016.07.023
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发表时间：
2016
影响因子：
4.7
通讯作者：
I. Takewaki
中科院分区：
文献类型：
--
作者：
Y. Kanno;I. Takewaki
双冲量法已被广泛地应用于弹塑性结构对脉冲型输入（包括近断层地震地面运动）的临界响应计算。本文提出了一种双脉冲输入下弹塑性单自由度结构鲁棒性的评估方法。在输入的初始速度，以及结构的固有频率和强度的不均匀性，被认为是。作为结构鲁棒性的基本性质，我们证明了鲁棒性测度关于固有频率的单调性。相比之下，我们表明，即使结构强度增加，鲁棒性也不一定会提高。此外，当性能要求改变时，两个不同结构强度的结构之间的鲁棒性偏好可能会发生逆转。
The double impulse has extensively been used to evaluate the critical response of an elastoplastic structure against a pulse-type input, including near-fault earthquake ground motions. In this paper, we propose a robustness assessment method for elastoplastic single-degree-of-freedom structures subjected to the double impulse input. Uncertainties in the initial velocity of the input, as well as the natural frequency and the strength of the structure, are considered. As fundamental properties of the structural robustness, we show monotonicity of the robustness measure with respect to the natural frequency. In contrast, we show that robustness is not necessarily improved even if the structural strength is increased. Moreover, the robustness preference between two structures with different values of structural strength can possibly reverse when the performance requirement is changed.