【摘要】 结构抗震设计一直以统计平均值为设防水准,此方法简单但缺乏概率意义的评估值。本文基于硬土场地内309条新获得的地震动记录,建立周期、区间与概率值三者的三维概率分布图,发现概率值难以集中在区间值为1附近,说明以统计平均值为设防水准得出的地震作用概率水平并不相同,应采用统一的累积概率水准进行抗震设防。为此建立了三维累积概率分布图,得出了不同概率保证下的地震影响系数反应谱,并拟合出8度设防水准下不同概率保证的地震影响系数反应谱回归公式。更多还原

【Abstract】 The architecture earthquake-resistance design has took the statistics mean value as fortification standards,which is simple but lacks the probability assessments.Based on the 309 new land records with hard ground being calculated,the three-dimensional distributed probability chart about the periods,interval and probability is established in this paper.The probability value is found difficult to concentrate near the interval value of 1,indicating the probability level of the earthquake,being gained from the statistics mean value for the fortification standard is not the same,so the unified cumulative probability standard to the earthquake-resistance design should be adopt.Therefore,it is necessary to establish the cumulative probability chart of the three-dimensional maps,and obtains the response spectrum of the earthquake effects coefficient under different probability guarantee rate.At one time it fits the response spectrum of the earthquake influence coefficient guaranteed by different probability under eight minimum security standards.更多还原