日韩人妻无码一区二区三区久久99_日韩精品一区二区三区中文在线_无码日韩精品一区二区免费_久久久91精品国产一区二区三区_亚洲精品久久久一区黄无码_精品欧美一区二区在线观看欧美熟_精品一区二区高清免费观看_国产免费一区2区3区_国产日韩精品福利视频综合一区二区三区四区

Structural design knowledge: steel seismic calculation of damping ratio choose how much?

Structural design knowledge: steel seismic calculation of damping ratio choose how much?

Steel seismic calculation of damping ratio choose how much?
In case of more than one computing earthquake under highly desirable when not more than 50m 0.04; height greater than 50m and less than 200m, desirable 0.03; the height of not less than 200m, should take 0.02.
2 When the eccentric portion of the support frame to bear seismic overturning moment when the structure is greater than 50% of the total seismic overturning moment, the damping ratio (1) of this section corresponding increase in comparable 0.005.
3 Under rare earthquake elastic-plastic analysis desirable damping ratio 0.05.