The basic seismic intensity of a region is defined as the maximum intensity to be suffered within a given interval of time in the future under the site condition of that region.
地震基本烈度是指某地区今后一定时期内，在一般场地条件下可能遭受的最大烈度。
The research of physical measure of seismic intensity is a history and basic subject and the study of damage potential of earthquake ground motion has been worked on for more than one hundred years.
地震烈度物理标准是一个具有悠久历史的基础性的研究课题，由它引发出的地震动破坏势研究也已开展了一百多年。
Then, the paper evaluated the anti-seismic performance of the structure under basic and rare earthquake intensity.
然后对结构在基本烈度和罕遇烈度地震作用下的抗震性能进行评估。
Then, the paper evaluated the anti-seismic performance of the structure under basic and rare earthquake intensity.
然后对结构在基本烈度和罕遇烈度地震作用下的抗震性能进行评估。
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