摘要
Abstract
Based on the modified values of design feature period in seismic code for the premise, statistical calculated the design feature period value. 437 strong earthquake records in Midwestern United States were collected. Seismic wave processing software, SeismoSignal, was used to statistics calculate design feature period value and research the affecting factors on design characteristics period. Coverage and usability research of strong earthquake record database showed that this database acquisition is reasonable. Hundreds of United States earthquake records were classified, according to magnitude, epicenter, site classification to statistically calculate mainly the feature period value for Ⅰ ,Ⅱ ,Ⅲ kind of site. The three factors including the site classification, the magnitude, the epicenter which influences the value of characteristics period, was analyzed in linear regression way. The results show that different categories, magnitudes and epicenters, have significant influence on the design response spectrum characteristic value. If the site condition is softer, the feature period value becomes larger. And feature period has good linear relation with the magnitude, but the relevance of the epicenter is not obvious.关键词
抗震设计/特征周期/场地分类/震中距Key words
seismic design/ feature period/ site classification/ epicenter分类
建筑与水利
