| 近断层速度脉冲的地震动特性研究 |
| |
| 引用本文： | 韦韬,赵凤新,张郁山. 近断层速度脉冲的地震动特性研究[J]. 地震学报, 2006, 28(6): 629-637 |
| |
| 作者姓名： | 韦韬 赵凤新 张郁山 |
| |
| 作者单位： | 中国北京,100081,中国地震局地球物理研究所;中国桂林,541004,桂林工学院;中国北京,100081,中国地震局地球物理研究所 |
| |
| 基金项目： | 国家自然科学基金，中国地震局地球物理研究所项目 |
| |
| 摘 要： | 在搜集了大量近断层具有速度脉冲的记录后，对有速度脉冲和无速度脉冲的记录的反应谱和特征周期进行了对比，将近断层记录的反应谱与我国规范标准反应谱进行了比较， 还将各次地震有速度脉冲记录的反应谱和特征周期与规范标准谱及规范给出的特征周期进行了比较. 通过比较可知，在长周期段（大约在1.5 s以后），有速度脉冲记录的反应谱值要比无速度脉冲记录的反应谱值大；计算特征周期时，对于近断层记录，T1和T2有后延的趋势， 采用不固定频段的方法计算更加合理； 无论是相对我国规范的Ⅰ类还是Ⅱ类场地， 有速度脉冲记录的特征周期比规范中给出的值都要大，均在规范值的2倍以上.
|
| 关 键 词： | 近断层 速度脉冲 地震动 反应谱 特征周期 |
| 文章编号： | 0253-3782(2006)06-0629-09 |
| 修稿时间： | 2006-02-02 |
CHARACTERISTICS OF NEAR-FAULT GROUND MOTION CONTAINING VELOCITY PULSES |
| |
| Wei Tao,Zhao Fengxin,Zhang Yushan. CHARACTERISTICS OF NEAR-FAULT GROUND MOTION CONTAINING VELOCITY PULSES[J]. Acta Seismologica Sinica, 2006, 28(6): 629-637 |
| |
| Authors: | Wei Tao Zhao Fengxin Zhang Yushan |
| |
| Abstract: | Through collection of a large number of near-fault records containing velocity pulses, the response spectra and the characteristic periods of records containing no pulses are compared with those of records containing pulses. Response spectra of near-fault records are compared with standard spectra given by code; furthermore, the response spectra and the characteristic periods of each earthquake are compared with that given by the code. The result shows that at long periods (longer than 1.5 s), the response spectrum of pulse-containing records is bigger than the response spectrum of no-pulse-containing records; when the characteristic period of near-fault records is calculated, the method that does not fix frequency is more reasonable because the T_1 and T_2 have a lagging tendency; regardless of the site I and site II, the characteristic period of pulse-containing records is over twice bigger than the characteristic period given by the code. |
| |
| Keywords: | near-fault velocity pulse ground motion response spectrum characteristic period |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
|
点击此处可从《地震学报》下载免费的PDF全文 |
