论文部分内容阅读
本文讨论的是没有强震资料的地区在做地震动模拟时遇到的一些问题。模拟的地震动时程曲线基于统计的衰减数据，如地面加速度峰值或速度反应谱。由于这些数据并不包含有关地震动频率成分的信息．要使用相同的统计反应谱对地震动可以随机模拟为稳态或准稳态的设想加以证明。通过分析显示，如果假定不同的波形，成层软上场地反应得到的时程曲线差别很大。传统上使用的ＳＨ波假定与表面波模拟相比，通常前者导致的局部地点放大率比后者小。本文提出了模拟准稳态地震动方法，给出了分别代表ＳＨ波或ＳＨ波和Ｌｏｖｅ波的合成波的模拟为稳态或准稳态地震动的数字实例．使用不同的频率成分和假定不同的波形对模拟的运动影响很大，尽管模拟的地震动与其统计数据相当吻合。
This article discusses some problems encountered when doing ground motion simulation in areas without strong earthquake data. The simulated ground motion time history curves are based on statistical attenuation data such as peak ground acceleration or velocity response spectra. Since these data do not contain information on the frequency components of earthquakes. Use the same statistical response spectrum to demonstrate that earthquakes can be randomly modeled as either steady-state or quasi-stationary. The analysis shows that, if different waveforms are assumed, the time history curves obtained by layering soft on-site reactions vary greatly. The SH wave conventionally used assumes that the former typically results in less local magnification than the latter, compared to surface wave simulations. This paper presents a method of simulating quasi-steady-state ground motions and presents numerical examples of simulations of steady-state or quasi-steady-state earthquakes that respectively represent SH waves or SH waves and Love waves. Using different frequency components and assuming different waveforms have a significant effect on the simulated motion, although the simulated ground motion quite closely matches its statistical data.