Increasing attention is being paid to the adverse effects of long period ground motion (LPGM) on high-rise buildings. However, it is hard to quantitatively define this special ground motion in seismic design, especially in the cases of regions in which sufficient seismic observations have not been made. To this end, this paper proposes an innovative LPGM simulation method. This method not only involves probabilistic seismic hazard analysis (PSHA), but also overcomes the limitations of the original empirical relation-based method. Firstly, a large number of data taken from typical sedimentary basins are utilized to determine the basin amplification factor model, by which an improved response spectra attenuation formula is developed based on the site amplification mechanisms in different periods. Then, based on the statistical regression analysis of the basin correction factors, the modified group delay time empirical formula is obtained. Furthermore, the conventional PSHA model is refined to determine the scenario earthquake. Finally, the design LPGM is generated by the phase difference spectrum method and its impact on high-rise buildings is embodied via a case study. The satisfactory result proves that the proposed method can effectively simulate LPGM and may have great potential in practice.

人们越来越关注长期地面运动（LPGM）对高层建筑的不利影响。但是，很难在地震设计中定量地定义这种特殊的地面运动，特别是在尚未进行足够地震观测的地区。为此，本文提出了一种创新的LPGM仿真方法。该方法不仅涉及概率地震危险性分析（PSHA），而且克服了原始的基于经验关系的方法的局限性。首先，利用典型沉积盆地的大量数据确定盆地放大因子模型，并根据不同时期的场地放大机理，建立了改进的响应谱衰减公式。然后，在对盆地校正因子进行统计回归分析的基础上，获得了修正的群延迟时间经验公式。此外，对常规的PSHA模型进行了改进，以确定场景地震。最后，通过相位差谱法生成了LPGM设计，并通过案例研究体现了其对高层建筑的影响。令人满意的结果证明了该方法可以有效地模拟LPGM，在实践中具有很大的潜力。