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  席桂梅,郭雷,何书耕,张诗若,闵也,李启成.用改进的经验格林函数方法模拟唐山地震动[J].震灾防御技术,2019,14(1):97-107, DOI:10.11899/zzfy20190110.

用改进的经验格林函数方法模拟唐山地震动
摘要:    建筑物的抗震设防需要尽可能地掌握未来大地震强震动记录信息,但大地震强震动记录的匮乏阻碍了抗震设防实践的发展。经验格林函数方法作为模拟地震动的主要方法,可以提供可靠的大地震强震动记录,但也存在着许多问题,如缺乏对大地震断层滑动分布不均匀的描述、用经验确定小震数目、模拟方法受到大小地震相似条件的限制等。文中对上述经验格林函数方法存在的问题进行了研究,改进的经验格林函数方法,有效地解决了上述问题。并用其对唐山大地震进行了模拟,并把模拟的地震动时程和反应谱与实际记录相比较,发现用改进方法模拟的地震动加速度反应谱比用未改进方法模拟结果更接近实际的地震动记录加速度反应谱。由此说明改进的经验格林函数可更准确的模拟地震动。
作者单位
席桂梅 朝阳师范高等专科学校, 辽宁朝阳 122000;辽宁工程技术大学, 辽宁阜新 123000 
郭雷 辽宁工程技术大学, 辽宁阜新 123000 
何书耕 辽宁工程技术大学, 辽宁阜新 123000 
张诗若 辽宁工程技术大学, 辽宁阜新 123000 
闵也 辽宁工程技术大学, 辽宁阜新 123000 
李启成 辽宁工程技术大学, 辽宁阜新 123000 
关  键  词:唐山地震  改进的经验格林函数  地震动模拟  经验格林函数
DOI:10.11899/zzfy20190110
基金项目:辽宁省教育厅项目(551610001219)
收稿日期:2018-06-29
作者简介:席桂梅,女,生于1963年。副教授。主要从事地球物理学研究。E-mail:378086149@qq.com
通讯作者:李启成,男,生于1963年。副教授。主要从事地震工程学研究。E-mail:731732866@qq.com
Ground Motion Simulations of Tangshan with Improved Empirical Green's Function
Abstract:      The seismic fortification of buildings needs to master the records of future large earthquakes as much as we can, but the lack of time histories of large earthquakes have hindered the progress of fortification for large earthquakes. Empirical Green's function method as the main method to simulate ground motions, can provide reliable strong ground motion records, but there are lack of descriptions that earthquake fault slip distribution is not uniform, the number of small earthquake is determined by experience, and simulation method is limited by similar condition. Therefore, the above situations are studied, and an improved empirical Green's function method is proposed to effectively solve the above problems effectively. We used to improved empirical Green's function method to simulate the Tangshan earthquake. The comparisons are made for the simulated seismic time histories, response spectra and the records. We found that the response spectra simulated by the improved method are closer to the seismic records than those obtained by the no-improved method. It is shown that the improved method is an effective method for simulation of ground motion.
Keywords:  Tangshan earthquake  Improved Empirical Green's function  Ground motion simulation  Empirical Green's function
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