鋼纖維高強(qiáng)混凝土論文：鋼纖維高強(qiáng)混凝土邊節(jié)點(diǎn)試驗(yàn)研究有限元分析

1、鋼纖維高強(qiáng)混凝土論文：鋼纖維高強(qiáng)混凝土邊節(jié)點(diǎn)試驗(yàn)研究有限元分析【中文摘要】節(jié)點(diǎn)作為建筑結(jié)構(gòu)的重要部位，不但是結(jié)構(gòu)傳遞和分配內(nèi)力的樞紐，而且對結(jié)構(gòu)進(jìn)入彈塑性工作階段仍能保持整體性發(fā)揮著重要作用，其破壞往往會導(dǎo)致整個(gè)建筑結(jié)構(gòu)倒塌。因此,有必要全面分析和研究節(jié)點(diǎn)的工作機(jī)理，從強(qiáng)度計(jì)算和延性構(gòu)造兩個(gè)方面采取措施,使節(jié)點(diǎn)滿足正常使用和抗震設(shè)防的要求。本文通過試驗(yàn)研究和有限元分析，對鋼筋鋼纖維高強(qiáng)混凝土框架邊節(jié)點(diǎn)的力學(xué)性能進(jìn)行了探討,主要研究內(nèi)容如下：（1）通過3個(gè)鋼筋鋼纖維高強(qiáng)混凝土框架邊節(jié)點(diǎn)縮尺試件低周反復(fù)加載試驗(yàn)研究和非線性有限元分析，探討了鋼纖維體積率、梁端鋼纖維摻加范圍、軸壓比和配箍率等對鋼筋鋼

2、纖維高強(qiáng)混凝土框架邊節(jié)點(diǎn)的延性、耗能能力和剛度退化等抗震性能的影響。結(jié)果表明，隨著鋼纖維體積率的增大，或隨著柱端軸壓比的增大，框架節(jié)點(diǎn)的耗能能力得到提高。（2）基于鋼筋鋼纖維高強(qiáng)混凝土框架邊節(jié)點(diǎn)的試驗(yàn)研究結(jié)果，采用非線性有限元程序，建立鋼筋鋼纖維框架邊節(jié)點(diǎn)的受力模型，探討了軸壓比對鋼筋鋼纖維高強(qiáng)混凝土框架邊節(jié)點(diǎn)的延性、耗能能力和剛度退化等抗震性能的影響，提出鋼筋鋼纖維高強(qiáng)混凝土框架梁柱邊節(jié)點(diǎn)合理的有限元模型，有限元分析結(jié)果與試驗(yàn)結(jié)果吻合較好。（3）綜合考慮影響節(jié)點(diǎn)核心區(qū)受剪承載力的主要參數(shù),提出了鋼筋鋼纖維高強(qiáng)混凝土框架邊節(jié)點(diǎn)核心區(qū)受剪承載力計(jì)算公式,理論分析結(jié)果與試驗(yàn)結(jié)果吻合較好。【英文摘要

3、】Asanimportantpartofbuildingstructure,jointisnotonlythecentralhubofstructuretransferanddistributioninternalforce,butalsoplaysanimportantroleinkeepingthestructuralintegritywhenstructuregoesintotheelastic-plasticworkingperiod.Thefailureofjointwillusuallycausethecollapseofthewholebuildingstructure.Ther

4、efore,itisnecessarytofullyanalyzeandstudytheworkingmechanismofjoint.Bytakingmeasuresfromtheaspectsofstrengthcalculationandductilitytectonic,anditwillmakejointsatisfytherequirementsofnormaluseandseismicfortification.Thispaperdiscussedthesteelfiberreinforcedhigh-strengthconcreteframeexteriorjointsbyex

5、perimentalresearchandfiniteelementanalysis,andthemaincontentsareasfollows:(1)Bystudyingthethreesteelfiberreinforcedconcreteframejointsreducedscalemodellowcyclicreversedloadingandnonlinearfiniteelementanalysis,itdiscussedtheinflueneeofaxialcompressionratioupontheframejointductility,energydissipationc

6、apacityandstiffnessdegradation.Theresultshowsthat,withtheincreaseofcolumnendaxialcompressionratio,theenergydissipationcapacityofframejointsalsoimproves.(2)Basedontheexperimentalresultofthesteelfiberreinforcedframebeam-columnexteriorjoint,andbysettingtheforcemodelofsteelfiberjointbynonlinearfiniteele

7、mentprogram,itdiscussedtheinflueneeofaxialeompressionratioupontheframejointductility,energydissipationcapacityandstiffnessdegradation,andbroughtforwardtherationalfiniteelementmodelofthesteelfiberreinforcedframebeam-columnexteriorjoint,andthefiniteanalysisresultcoincideswellwiththeexperimentalresult.

8、(3)Itcomprehensivelyconsideredthemainparametersinfluencethejointcoreareashearingbearingcapacity.Itbroughtthecalculationformulaofjointcoreshearbearingcapacity,andthetheoreticalanalysisresultcoincideswellwithexperimentalresult.【關(guān)鍵詞】鋼纖維高強(qiáng)混凝土邊節(jié)點(diǎn)試驗(yàn)研究有限元分析【英文關(guān)鍵詞】SteelFiberReinforcedHighStrengthConcreteFrameexteriorjointExperimentalResearchFiniteElementAnalysis【目錄】鋼纖維高強(qiáng)混凝土邊節(jié)點(diǎn)試驗(yàn)研究與有限元分析摘要5-6Abstract6-71緒論10-161.1