基于加速度反应谱与地震动持时的地震输入能量谱研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (21) : 21-30.

论文

基于加速度反应谱与地震动持时的地震输入能量谱研究

郑彦君1，王湛1,2，刘德铭1，潘建荣1,2，胡方鑫1,2

作者信息 +

Seismic input energy spectrum based on modified acceleration response spectrum and seismic duration

ZHENG Yanjun1, WANG Zhan1,2, LIU Deming1, PAN Jianrong1,2, HU Fangxin1,2

Author information +

文章历史 +

摘要

建立具有设计意义的地震动总输入能量谱是实现结构能量设计的基础。根据中长周期段修正的加速度反应谱及地震动有效震时，提出了一种生成地震动输入能量谱的方法。统计 270 组人工波的时程分析结果，得到了以等效速度表征的四段式弹性单自由度（single degree of freedom, SDOF）体系总输入能量谱，并给出了不同场地类型、抗震设防烈度等设计条件下归一化等效速度谱的参数取值。在考虑延性系数及刚度折减系数的影响后，提出了弹塑性 SDOF 体系修正输入能量谱的等效速度谱，估算了引起结构损伤的滞回耗能占总能量的比值。该能量谱可为基于能量的结构设计及研究提供参考。

Abstract

Establishing seismic input energy spectra is foundational for realizing energy-based seismic design. This study proposes a method to generate input energy spectra, considering the medium and long period corrections of design acceleration response spectra, and the effective duration of ground motions. Analyzing the time history results of 270 sets of artificial ground motions, a four-piece form input energy spectrum for elastic single degree of freedom (SDOF) systems represented in equivalent velocity is derived. Parameters for the normalized equivalent velocity spectra, which vary under different design conditions such as sites and earthquake intensities, are provided. Furthermore, considering the ductility coefficient and stiffness reduction factor, the equivalent velocity spectra for the revised input energy spectra of elasto-plastic SDOF system are proposed. The ratio of hysteretic energy that causes structural damage to the total energy is estimated. The findings could offer a reference for energy-based structural design and research.

导出引用

郑彦君1, 王湛1, 2, 刘德铭1, 潘建荣1, 2, 胡方鑫1, 2. 基于加速度反应谱与地震动持时的地震输入能量谱研究[J]. 振动与冲击, 2024, 43(21): 21-30

ZHENG Yanjun1, WANG Zhan1, 2, LIU Deming1, PAN Jianrong1, 2, HU Fangxin1, 2. Seismic input energy spectrum based on modified acceleration response spectrum and seismic duration[J]. Journal of Vibration and Shock, 2024, 43(21): 21-30

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