Characteristic periods of response spectrum for far-field long-period seismic ground motions

被引：0

作者：

Zhou, Jing ^{[1
,2
]}

Fang, Xiaodan ^{[1
,3
]}

Jiang, Yi ^{[3
]}

机构：

[1] State Key Laboratory of Subtropical Architecture Science, South China University of Technology, Guangzhou

[2] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou

[3] Architectural Design and Research Institute of South China University of Technology, Guangzhou

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2015年 / 36卷 / 06期

关键词：

Characteristic period; Correlation; Dynamic magnification coefficient; Long-period ground motion; Response spectrum;

D O I：

10.14006/j.jzjgxb.2015.06.001

中图分类号：

学科分类号：

摘要：

The effect of primary factors and the statistical characteristics of two corner periods for far-field long-period seismic response spectrum were studied. Considering the difference of epicentral distance, earthquake magnitude and site condition, the digital ground motion records with rich long-period component from destructive shallow earthquake were selected. Based on the response spectrum analysis, Newmark-Hall type models were employed to calculate the first corner period (Tg) and the second corner period (TD) of acceleration response spectrum, and the variation rule of two characteristic periods were analyzed. The results show that two characteristic periods, the Tg and TD, increase with the increase of epicentral distance and earthquake magnitude. The site conditions have significant effects on the Tg, but have minor effect on the TD. The rank correlations between the Tg and epicentral distance and earthquake magnitude, the TD and epicentral distance and earthquake magnitude, are in medium-weak level, which indicates that it is not reliable to estimate the Tg, TD through a single epicentral distance and earthquake magnitude, though the Tg, TD rely popularly on epicentral distance and earthquake magnitude. The linear correlation between the Tg and the TD is in medium-weak level, which indicates that the existing linear model, estimating the TD from the Tg in seismic design spectrum in Chinese code, is not very suitable for long-period seismic response spectrum. Considering the combined effect of epicentral distance, earthquake magnitude and site condition, the calculation model of two characteristic periods, the Tg, TD, for long-period seismic response spectrum are proposed, which can provide a reference to specification revision. According to the statistical average value for four types of sites, the characteristic period values are proposed. ©, 2015, Science Press. All right reserved.

引用

页码：1 / 12

页数：11

共 24 条

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