双向水平地震作用
bi-directional seismic action
水平地震作用
horizontal earthquake action
horizontal seismic
lateral earthquake effect
role of horizontal seismic
horizontal seismic response
horizontal seismic action
水平地震作用方向
horizontal seismic direction
水平地震作用计算
horizontal seismic force calculating
作用效应偶然组合
accidental combination for action effects
作用效应系数
coefficient of effect of action
作用效应组合
combination of action effects
combination for action effects