青岛理工大学学报
青島理工大學學報
청도리공대학학보
JOURNAL OF QINGDAO TECHNOLOGICAL UNIVERSITY
2012年
1期
15-23
,共9页
反应谱%软土场地%三维图%分布概率%累积概率%拟合
反應譜%軟土場地%三維圖%分佈概率%纍積概率%擬閤
반응보%연토장지%삼유도%분포개솔%루적개솔%의합
response spectrum%soft soil site%three-dimensional plot%distributive probability%cumulative probability%fit
目前反应谱都是以平均谱值作为设防水准，无法明确设防水准上的概率水平．选取软土场地上的368条地震记录进行分析，建立了关于周期、变化区间和分布概率的三维分布概率图，发现各条地震反应谱值与平均谱值的比值难以集中在1附近．．说明平均谱值反应谱不能体现统一的设防水准．因此建立了三维的累积概率分布图，求得不同概率保证率下的反应谱．最后还拟合出规定设防水准的反应谱和周期之间的关系表达式．
目前反應譜都是以平均譜值作為設防水準，無法明確設防水準上的概率水平．選取軟土場地上的368條地震記錄進行分析，建立瞭關于週期、變化區間和分佈概率的三維分佈概率圖，髮現各條地震反應譜值與平均譜值的比值難以集中在1附近．．說明平均譜值反應譜不能體現統一的設防水準．因此建立瞭三維的纍積概率分佈圖，求得不同概率保證率下的反應譜．最後還擬閤齣規定設防水準的反應譜和週期之間的關繫錶達式．
목전반응보도시이평균보치작위설방수준，무법명학설방수준상적개솔수평．선취연토장지상적368조지진기록진행분석，건립료관우주기、변화구간화분포개솔적삼유분포개솔도，발현각조지진반응보치여평균보치적비치난이집중재1부근．．설명평균보치반응보불능체현통일적설방수준．인차건립료삼유적루적개솔분포도，구득불동개솔보증솔하적반응보．최후환의합출규정설방수준적반응보화주기지간적관계표체식．
Currently, the average value of seismic response spectrum is taken＇as the fortification level, however, the probability of earthquake fortification level can not be clearly defined. The 368 seismic records of the soft soil site are analysed in the paper and the three-dimensional distributive probability plots of periods, variety intervals and distributive probability are established. It is shown that the ratio between every seismic response spectrum value and the average value are not around 1. So, the mean response spectrum can＇t reflect the unified fortification level. Thus, the three-dimensional cumulative probability plots are established and the response spectrum with different probability reliability can be obtained. Finally, the spectrum＇s expression between the provided fortification level and period is fitted.
