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首页> 外文期刊>Bulletin of Earthquake Engineering >Seismic damage estimation of in-plane regular steel moment resisting and x-braced frames
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Seismic damage estimation of in-plane regular steel moment resisting and x-braced frames

机译：面内常规抗弯矩和x形支撑框架的地震破坏估算

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摘要

Simple empirical expressions to estimate maximum seismic damage on the basis of five well known damage indices for planar regular moment resisting and x-braced steel frames are presented. They are based on the results of extensive parametric studies concerning the inelastic response of a large number of these frames to a large number of ground motions. Thousands of nonlinear dynamic analyses are performed by scaling the seismic records to different intensities in order to drive the structures to different levels of inelastic deformation and finally to collapse. The statistical analysis of the created response databank indicates that the number of stories, period of vibration, stiffness ratio, capacity factor (for moment resisting frames), brace slenderness ratio and column stiffness (for x-braced frames) and characteristics of the ground motion, such as characteristic period and spectral acceleration, strongly influence damage. Nonlinear regression analysis is employed in order to derive simple formulae, which reflect the influence of the aforementioned parameters and offer a direct estimation of the damage indices used in this study. More specifically, given the characteristics of the structure and the ground motion, one can calculate the maximum damage observed in column bases and beams (for moment resisting frames) or in braces (for x-braced frames). Finally, two examples serve to illustrate the use of the proposed expressions and demonstrate their accuracy and efficiency.
机译：提出了简单的经验表达式，以基于五个已知的平面规则抗弯矩和x支撑钢框架的破坏指数来估计最大地震破坏。它们基于大量参数研究的结果，这些参数涉及大量这些框架对大量地面运动的非弹性响应。通过将地震记录缩放到不同的强度，可以执行成千上万的非线性动力学分析，以使结构发生不同程度的非弹性变形并最终塌陷。对创建的响应数据库的统计分析表明，层数，振动周期，刚度比，承载力系数（对于抗弯框架），支撑细长比和立柱刚度（对于X支撑框架）以及地震动的特征诸如特征周期和频谱加速度之类的影响很大。为了得出简单的公式，可以使用非线性回归分析，该公式可以反映上述参数的影响，并可以直接估算本研究中使用的损伤指数。更具体地说，给定结构和地震动的特征，人们可以计算在柱基和梁（对于抗弯框架）或在支撑（对于X支撑框架）中观察到的最大损伤。最后，两个示例用于说明所提出的表达式的用法，并证明其准确性和效率。

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