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1、第45卷增刊2土木工程學(xué)報Vol．452012年CHINACIVILENGINEERINGJOURNAL2012場地特征周期與抗震設(shè)計反應(yīng)譜的連續(xù)化方法1122張世海熊輝霞?xì)W進(jìn)萍王光遠(yuǎn)(1．南陽理工學(xué)院，河南南陽473004;2．哈爾濱工業(yè)大學(xué)，黑龍江哈爾濱150090)摘要:首先，分析場地土分類的模糊性特征，給出四類標(biāo)準(zhǔn)場地二維隸屬函數(shù)的空間分布，實現(xiàn)場地的模糊化分類;然后，給出場地特征周期連續(xù)化方法及其空間分布圖，該方法所確定的特征周期分布與建筑抗震規(guī)范給出的特征周期等值圖吻合較好;最后，以二維隸屬函數(shù)及其相應(yīng)的標(biāo)準(zhǔn)設(shè)計反
2、應(yīng)譜為基礎(chǔ)，給出四類標(biāo)準(zhǔn)設(shè)計反應(yīng)譜的模糊化方法，建立基于標(biāo)準(zhǔn)場地二維隸屬函數(shù)和連續(xù)化特征周期的兩種設(shè)計反應(yīng)譜的連續(xù)化方法，給出其空間分布，探討連續(xù)化設(shè)計反應(yīng)譜的工程應(yīng)用。實踐表明:所建立的連續(xù)化設(shè)計反應(yīng)譜實現(xiàn)四類標(biāo)準(zhǔn)場地所對應(yīng)設(shè)計反應(yīng)譜的中間過渡，能更客觀反映具有復(fù)雜不確定性、模糊性和變異性特征的工程場地的現(xiàn)實情況，為更合理地考慮場地實際特征影響，更客觀科學(xué)地確定抗震設(shè)計反應(yīng)譜和地震作用提供新的思路和方法。關(guān)鍵詞:建筑抗震;設(shè)計反應(yīng)譜;場地類別;特征周期;空間連續(xù)化方法+中圖分類號:TU475．1O159文獻(xiàn)標(biāo)識碼:A文章編號
3、:1000-131X(2012)S2-0064-04Continuitymethodofthesitecharacteristicperiodandtheaseismicdesignresponsespectra1122ZhangShihaiXiongHuixiaOuJinpingWangGuangyuan(1．NanyangInstituteofTechnology，Nanyang473004，China;2．HarbinInstituteofTechnology，Harbin150090，China)Abstract:Fi
4、rstly，weanalysizedfuzzynaturesofthesitesoilclassification;presentedthefourstandardsitesmembershipfunctionandtheirtwo-dimensionalspatialdistributionandrealizethefuzzyclassification．Secondly，weintroducedcontinuummethodofthesitecharacteristicperiodandtheirspatialdistri
5、bution．Thepracticeshowsthatthecharacteristicperioddistributiondeterminedbythismethodiswellagereementwiththeequivalentchartofthecurrentconstructioncode．Atlast，onthebasisofthetwo-dimensionalmembershipfunctionandthecorrespondingstandarddesignresponsespectrum，wegavefour
6、typesoffuzzyresponsespectrummethods;establishedanarbitrarysitedesignresponsespectrumcontinuummethodandspatialdistribution;discussedtheengineeringapplicationofdesignresponsespectrum．Practiceshowsthat:Fuzzyresponsespectrumcanfulfillmoresmoothtransitionforfoursitesstan
7、darddesignresponsespectra．Itcanmoreobjectivelyreflectthecomplexuncertainty，fuzzificationandvariabilityoftheactualsitecharacteristics;andprovidenewideasandmethodsformorereasonabletoconsidercharacteristicsoftheactualsite，morescientificallydetermineseismicdesignearthqu
8、akeresponsespectrum．Keywords:aseismicdesign;siteclassification;characteristicperiod;designresignresponsespec-tra;fuzzificationmethodE-mail
