In this study, strong ground motion records were decomposed by wavelet transform using denoising and downsampling methods. To evaluate the changes in the frequency content of earthquake records during wavelet-based decomposition process, the v_max/a_max values of the main and decomposed records were compared. According to the results, decomposition gives reasonable outcomes up to the third level. The accuracy of the earthquake decomposition methods was examined by analyzing seismic responses of a real site. The site response under main earthquake records and wavelet-based records at different decomposition levels was determined using DEEPSOIL program and compared with the real response of the site. The results illustrate an acceptable agreement between the ground response under wavelet-based records and the site response under the main earthquake record. The results of seismic ground response indicate that denoising-based decomposed records offered a better performance in dynamic analysis compared to the downsampling-based decomposed records.

在这项研究中，使用去噪和下采样方法通过小波变换分解强地震动记录。为了评估在基于小波的分解过程中地震记录的频率内容的变化，v _max /a _max比较主记录和分解记录的值。根据结果​​，分解给出了第三级的合理结果。通过分析实际场地的地震反应，检验了地震分解方法的准确性。使用DEEPSOIL程序确定主要地震记录和基于小波记录的不同分解级别下的站点响应，并与站点的实际响应进行比较。结果表明小波记录下的地面响应与主地震记录下的现场响应之间存在可接受的一致性。地震地面响应的结果表明，与基于下采样的分解记录相比，基于去噪的分解记录在动力分析中提供了更好的性能。