CAJ | 학술논문

将选择的746条各国强震记录按照我国建筑抗震设计规范中的规定进行场地分类.按照最新的识别近场强速度脉冲地震记录的定量方法,将选择的地震记录划分为中远地震、近震及近场强脉冲地震记录.利用这些强震记录,统计得到了近场强脉冲地震对应Ⅰ,Ⅱ,Ⅲ,Ⅳ四类场地的等延性位移比谱、等强度位移比谱的计算公式,并由此研究了场地条件及各种地震动参数对等延性位移比谱、等强度位移比谱的影响.结果表明：近场地震动的脉冲作用在中短周期段[0.3 s,5 s]对等延性位移比谱的影响较大,近场地震动的脉冲作用在中短周期段[0.5 s,3 s]对等强度位移比谱的影响较大且部分可达80%以上,场地条件对影响周期段的范围有重要影响；峰值地面速度与峰值地面加速度比(PGV/PGA)是影响近场地震动位移比谱最大的参数.
장선택적746조각국강진기록안조아국건축항진설계규범중적규정진행장지분류.안조최신적식별근장강속도맥충지진기록적정량방법,장선택적지진기록화분위중원지진、근진급근장강맥충지진기록.이용저사강진기록,통계득도료근장강맥충지진대응Ⅰ,Ⅱ,Ⅲ,Ⅳ사류장지적등연성위이비보、등강도위이비보적계산공식,병유차연구료장지조건급각충지진동삼수대등연성위이비보、등강도위이비보적영향.결과표명：근장지진동적맥충작용재중단주기단[0.3 s,5 s]대등연성위이비보적영향교대,근장지진동적맥충작용재중단주기단[0.5 s,3 s]대등강도위이비보적영향교대차부분가체80%이상,장지조건대영향주기단적범위유중요영향；봉치지면속도여봉치지면가속도비(PGV/PGA)시영향근장지진동위이비보최대적삼수.
Based on the classified site criterion in current seismic design code of building (GB 50011-2010)and quantitative classification scheme of near-fault ground motions proposed by Baker,the sites of 746 accelerograms from the strong-motion databank of some countries were classified as four site classes, and the 746 accelerograms were classified as far-field,near-fault and near-fault pulse-type ground motion accelerograms.Using the selected accelerograms,the empirical equations of near-fault pulse-type ground motion corresponding to four kinds of sites were presented for the inelastic displacement ratio spectra of constant ductility and constant yielding strength.The effects of site condition and different ground motion parameters on inelastic displacement ratio spectra were also evaluated.It is concluded that the influences of near-fault pulse-type ground motion on displacement ratio spectra of constant ductility and constant yield-ing strength are significant at periods [0.3 s,5 s]and periods [0.5 s,3 s]respectively,and site condition can control the period ranges of the above significant effect.PGV/PGA can provide the largest influence on displacement ratio spectra for near-field ground motions.