竖向与水平向地震动分量卓越周期的比值在0.7 - 0.9之间，竖向设计反应谱的特征周期应有单独规定。
The ratio of vertical and horizontal predominant period is 0.7-0.9, so independent characteristic period of vertical design response spectrum should be defined.
三条地震带的卓越周期分别为17、30和335年。即由板块冲撞部位向大陆内部，地震活动周期由十几年增加到几百年。
The predominateperiod of the three belts is 17, 30 and 335 years respectively, the period increases from 17 to 335 years with the site of the plate in collision toward the inside of continent.
应用推荐