近断层地震动作用下隔震结构的优化设计

22卷1期

2006年3月世　界　地　震　工　程WORLDEARTHQUAKEENGINEERINGVol.22,No.1Mar.,2006文章编号:100726069(2006)0120001208

近断层地震动作用下隔震结构的优化设计

杨迪雄　李　刚　程耿东

(大连理工大学工程力学系,工业装备结构分析国家重点实验室,辽宁大连116023)

摘要:首先讨论了近断层脉冲型地震动的特点,入,应用含潜在约束策略的序列二次规划算法,,ElCentro(1940)、Taft

(1952),对考虑脉冲型近断层地震动

,构设计需求。

;隔震结构;铅芯橡胶支座;动力优化设计

P315文献标识码:A

Optimumdesignofbase2isolatedstructuresubjected

tonear2faultgroundmotions

YANGDi2xiong　LIGang　CHENGGeng2dong

(DepartmentofEngineeringMechanics,StateKeylaboratoryforStructuralAnalysis

ofIndustrialEquipment,DalianUniversityofTechnology,Dalian116023,China)

Abstract:Inthepresentpaper,thecharacteristicsofnear2faultpulse2likegroundmotionsarediscussedfirstly.Secondly,thenear2faultpulse2likeearthquakerecordfromtheTaiwanChi2ChiEarthquake(1999,9,21)istakenastheinputofgroundmotions,andbyusingthesequentialquadraticprogrammingalgorithmwiththepotentialcon2straintsstrategytheintegratedoptimumdesignofamulti2storyRCbase2isolatedframestructurewithlead2corerub2berbearingsisconducted,inwhichthestructuralmembersizesandtheparametersofisolationdevicesareopti2mizedsimultaneously.Finally,theearthquakeresponseoftheoptimalbase2isolatedstructureisanalyzedsubjectedtotheElCentro(1940)andTaft(1952)earthquake.Itisconcludedfromthenumericalresultsthatthroughtheparametricoptimumdesignofbase2isolatedbuildingsubjectedtothepulse2likenear2faultearthquake,theoptimalstructurecansatisfysimultaneouslythestructuraldesignrequirementunderboththepulse2likenear2faultgroundmotionsandthegeneralnon2pulse2likeones.

Keywords:seismicdesignofstructures;near2faultgroundmotions;base2isolatedstructure;lead2corerubberbearings;optimumdesign

1　引言

最近几次大地震,即美国Northridge地震(1994)、日本Kobe地震(1995)、台湾集集地震(1999)的近断收稿日期:2005-05-19;　修订日期:2005-08-21

　　基金项目:国家自然科学基金资助项目(5985410,50008003)

　　作者简介:杨迪雄(1970-),男,博士,主要从事结构抗震减灾方面研究工作.