匹配目标谱模拟地震动记录时频特征对比分析

发布时间：2018-12-08 10:29

【摘要】：不同类型匹配目标谱的模拟地震动记录被广泛应用于结构时程分析。以人工合成、小波变换频域调整以及时域调整生成模拟地震动记录方法作为研究对象,采用傅里叶变换和希尔伯特-黄变换方法对比分析了不同类型的模拟地震动记录频域和时频特性;选择不同恢复力模型的弹塑性单自由度结构进行时程分析,对比分析了采用不同类型记录计算的结构位移和能量反应。时域调整记录的地震动特征与实际地震动记录接近,而人工合成记录无法反映实际地震动输入能量特征,不适用于进行结构能量反应评价。
[Abstract]:Simulated ground motion records of different matching target spectra are widely used in structural time history analysis. Artificial synthesis, frequency domain adjustment of wavelet transform and time domain adjustment are used to generate simulated ground motion records. Fourier transform and Hilbert-Huang transform are used to analyze the frequency domain and time-frequency characteristics of different kinds of simulated ground motion records. Elastoplastic single-degree-of-freedom structures with different restoring force models were selected for time-history analysis, and the displacement and energy responses of structures calculated by different types of records were compared and analyzed. The characteristics of ground motion recorded in time domain adjustment are close to those of actual ground motion records, but synthetic records can not reflect the input energy characteristics of actual ground motions, so they are not suitable for structural energy response evaluation.
【作者单位】：合肥工业大学建筑与艺术学院;合肥工业大学土木与水利工程学院;
【基金】：国家自然科学基金项目(51378167)
【分类号】：TU311.3

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