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A method for evaluating earthquake-induced structural damage based on displacement and hysteretic energy

机译：基于位移和滞回能量的地震结构损伤评估方法

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摘要

Rather than viewing earthquake-induced structural damage as a single index of maximal deformation, it can be viewed as a combination of two indices, that is, the deformation demand and dissipation of energy. A method for evaluating the earthquake-induced damage of multi-storey buildings is presented that considers the maximal storey drift and the storey hysteretic energy. In this method, the maximal storey drift is estimated by means of the strength reduction factor spectrum, pushover analysis and distribution formula of deformation along structural storeys, which is based on the modal decomposition hypothesis in the nonlinear response stage of structures. For estimating the storey hysteretic energy demand, the normalized hysteretic energy spectrum of constant ductility factors is established, where the normalized hysteretic energy is defined as the ratio of the hysteretic energy to the square of the peak ground acceleration, and the formula for the distribution of hysteretic energy along structural storeys is derived based on the relation of the simplified internal forces of structures. For demonstrating the process of the proposed method and verifying its accuracy, an example is implemented, and the analysis results of the example indicate the following: (1) the method proposed in this article is a simple and easily implemented method for evaluating the structural damage induced by earthquakes and (2) the distribution formulas of the maximal drift and hysteretic energy along structural storeys derived in this article are relatively accurate.
机译：与其将地震引起的结构破坏视为最大变形的单个指标，不如将其视为两个指标的组合，即变形需求和能量耗散。提出了一种考虑最大层间位移和层间滞回能量的多层建筑物地震诱发损伤的评估方法。该方法基于结构非线性响应阶段的模态分解假说，通过强度折减系数谱，推覆分析和沿结构层的变形分布公式估算最大层间位移。为了估算储层的滞回能量需求，建立了具有恒定延性因子的归一化滞后能量谱，其中归一化滞后能量定义为滞后能量与峰值地面加速度的平方之比，以及基于结构简化内力的关系，得出沿结构层的滞回能量。为了说明所提方法的过程并验证其准确性，以一个实例为例，实例分析结果表明：（1）本文提出的方法是一种简便易行的评估结构损伤的方法。 （2）本文推导的沿结构层的最大漂移和滞回能量的分布公式相对准确。

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