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中文摘要：
从美国加州大学地震动数据库选取40条强震记录并按我国场地类型进行了分类;基于能量平衡原理,采用归一化方法,分析了不同地震动作用和结构自身质量对弹性、弹塑性SDOF体系地震输入能量谱的影响;并根据能量谱特征提出了一种更为简便且可直接用于我国场地类型的三段式能量谱,并给出了相关参数取值。分析结果表明：SDOF体系质量对三段式能量谱曲线的分界周期无明显影响;在场地土类型和结构自身质量相同的情况下,弹性SDOF体系地震输入能量是弹塑性SDOF体系的1.1倍~1.4倍。
英文摘要：
In this paper, 40 strong seismic records are selected from American PEER database and classified according to Chinese site classification. Then the effects of the ground motion parameters and the structure＇s own quality on energy spectra are analyzed for elastic and elastic-plastic SDOF systems. All the work was based on the energy balance principle and normalization methods, respectively. On this basis, a much simpler three-segment input energy spectra is proposed and related parameters are given. The simplified energy spectrum can fit the site type in China and be directly used for engineering calculations. The results indicate that the quality has no obvious effect on characteristic periodic points located between each two stages of the energy spectrum. And the input energy for elastic SDOF systems is more than that for elastic-plastic SDOF systems if the site condition and the structure＇s own mass are kept as constant.
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ISCS method for the performance-based seismic design of vertically irregular reinforced concrete fra
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