连续梁桥钢阻尼滑板支座隔震性能试验研究.pdf

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1、桥梁建设２０１７年第４７卷第６期（总第２４７期）１８BridgeConstruction，Vol．４７，No．６，２０１７（TotallyNo．２４７）文章编号：１００３－４７２２（２０１７）０６－００１８－０６连续梁桥钢阻尼滑板支座隔震性能试验研究１１２２夏樟华，吴应雄，张银喜，孔令俊（１．福州大学土木工程学院，福建福州３５０１０８；２．株洲时代新材料科技股份有限公司，湖南株洲４１２００７）摘要：为研究钢阻尼滑板支座对连续梁桥的隔震效果，以某２５m＋２５m连续梁桥为原型设计制作缩尺比为１∶５的模型，通过振动台

2、试验研究钢阻尼滑板支座的隔震性能，分析不同地震波类型、输入方向和强度对钢阻尼滑板支座隔震效果的影响。结果表明：当地震波频率接近模型桥的自振频率时，钢阻尼滑板支座的隔震效果相对较差；地震波双向输入时模型桥的加速度和位移响应大于单向输入时的响应；地震波横向输入时模型桥的地震响应大于纵向输入时的响应；输入地震动２强度越大，钢阻尼滑板支座的隔震效果越明显；加速度峰值３．８２m／s的地震波作用后，模型桥中墩出现微裂缝，但不影响桥梁的正常使用，钢阻尼滑板支座的隔震效果良好。关键词：连续梁桥；钢阻尼滑板支座；隔震性能；振动台

3、试验；地震波；地震响应；加速度峰值中图分类号：U４４８．２１５；U４４２．５５文献标志码：AExperimentalStudyofSeismicIsolationPerformanceofSteelDampingSlidingBearingforContinuousGirderBridge１１２２XIAZhanghua，WUYingxiong，ZHA-NGYinxi，KO-NGLingjun-（１．CollegeofCivilEngineering，FuzhouUniversity，Fuzhou３５０１０８，C

4、hina；２．ZhuzhouTimesNewMaterialTechnologyCo．，Ltd．，Zhuzhou４１２００７，China）Abstract：Toinvestigatetheseismicisolationeffectofthesteeldampingslidingbearingonthecontinuousgirderbridge，acontinuousgirderbridgewiththespansof２５m＋２５mwastakenastheprototypeandthemodelbridge

5、onthescaleof１∶５wasdesignedandfabricated．Theseismici-solationperformanceofthebearingwasstudiedthroughtheshaketabletestsandtheinfluencesofthedifferentseismicwavetypes，seismicinputdirectionsandseismicintensityontheisolationeffectofthebearingwereanalyzed．Theresu

6、ltsindicatethatwhentheseismicwavefrequenciesapproximatethenaturalvibrationfrequenciesofthemodelbridge，theisolationeffectofthebear-ingisrelativelypoor．Whentheseismicwavesareinputbidirectionally，theaccelerationanddis-placementresponsesofthebridgearegreaterthan

7、thosewhentheseismicwavesareinputunidirec-tionally．Whentheseismicwavesareinputtransversely，theseismicresponsesofthebridgearegreaterthanthosewhentheseismicwavesareinputlongitudinally．Thegreatertheinputgroundmotionintensityis，themoresignificanttheisolationeffec

8、tofthebearingwillbe．Undertheseis-２micwavewiththepeakaccelerationof３．８２m／s，themicrocracksappearinthemiddlepierofthebridge，butthecracksdonotinfluencethenormalserviceofthebridgeandtheisolationeffec