规范中关于设计地震动的规定。
设计地震区的高层建筑时，选择结构的适宜自振周期是十分重要的。
It is important to select reasonable natural period of high-rise building in seismic design.
这座机场的设计可以抵御地震和台风，而且事实证明它确实有效。
It is earthquake- and typhoon-resistant, and proven against both.
次框架的地震反应比主框架强烈，在结构抗震设计中不能忽略次框架的抗震问题。
Therefore, the earthquake resistance of the sub-frame cannot be ignored in the design of construction.
在1955年试验中采用的最后一种房屋的设计也具有防地震性能。
The last type of house subjected to test in 1955 was also of earthquake-resistant design.
新的设计应使地震频繁发生的城市更加安全。
The new designs should offer even greater security to cities where earthquakes often take place.
地震动强度指标是建筑结构抗震设计的重要依据。
Ground motion intensity measure (im) is an important basis for structural seismic design.
地震动强度指标是建筑结构抗震设计的重要依据。
Ground motion intensity measure (im) is an important basis for structural seismic design.
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