CAJ | 학술논문

在空间相关性人工地震动生成中，计算的繁杂和局部场地收敛性与幅值收敛性之间存在的矛盾，是时域合成法中的两大主要问题。为了简化计算，同步实现局部场地及地震动幅值的双重收敛性，在对相位角分布进行深入研究的基础上，构建了空间多点人工地震动幅值收敛因子，并采用虚实分离法来分解功率谱矩阵。结果表明，该方法生成的多点人工地震动计算快速，且幅值稳定收敛。
재공간상관성인공지진동생성중，계산적번잡화국부장지수렴성여폭치수렴성지간존재적모순，시시역합성법중적량대주요문제。위료간화계산，동보실현국부장지급지진동폭치적쌍중수렴성，재대상위각분포진행심입연구적기출상，구건료공간다점인공지진동폭치수렴인자，병채용허실분리법래분해공솔보구진。결과표명，해방법생성적다점인공지진동계산쾌속，차폭치은정수렴。
In the generation of spatial correlation ground motion ,there are two major problems in the time domain method ,the complexity of calculation and the contradiction between local convergence and amplitude convergence .In order to simplify the calculation and realize the double convergence ,on the foundation of further research about initial random phases ,an amplitude convergence factor had been introduced to this paper for the first time .In addition to this ,a new method had been introduced to decompose the power spectrum matrix ,which separated the imaginary part from the real component .The results show that , with this method ,the calculation is faster and the amplitude convergence is stable .