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1、帶高位大懸挑的高層建筑水平位移分析趙建敏萬(wàn)怡秀中鐵建工集團(tuán)有限公司設(shè)計(jì)院北京富力城房地產(chǎn)開(kāi)發(fā)有限公司摘要:iq前結(jié)構(gòu)規(guī)范屮對(duì)于豎向荷載作用下結(jié)構(gòu)水平位移計(jì)算和控制沒(méi)有明確要求,常規(guī)高層建筑無(wú)需考慮豎向荷載對(duì)水平位移的影響,但對(duì)于帶高位大懸挑的建筑來(lái)說(shuō),懸挑部位豎向荷載對(duì)結(jié)構(gòu)水平位移影響較大。以某項(xiàng)目為例,對(duì)帶高位大懸挑的框架-核心筒超高層結(jié)構(gòu)的水平位移進(jìn)行了分析研宄,主要分析了帶高位大懸挑的高層建筑的水平位移特征、樓板剛度對(duì)水平位移的影響、核心筒與框架之間的變形協(xié)調(diào)等,這些都與常規(guī)高層建筑有明顯不同。在分析研究的基礎(chǔ)上,提出了對(duì)帶高位大懸挑的框架-核心筒超高層結(jié)構(gòu)控制水平位移和層間位移角的方
2、法,總結(jié)歸納了帶高位大懸挑的高層建筑在進(jìn)行設(shè)計(jì)時(shí)的一些耍點(diǎn)及相應(yīng)的建議。關(guān)鍵詞:高位大懸挑;豎向荷載;水T位移;樓板剛度;作者簡(jiǎn)介:趙建敏,本科,總程師,Email:sephawk@126.com。Analysisonhorizontaldisplacementofhigh-risebuildingswithhigh-positionlargecantileverZhaoJianminWanYixiuTheDesignInstituteofChinaRailwayConstructionEngineeringGroup;BeijingR&FPropertiesDevelopmentCo.,L
3、td.:Abstract:Atpresent,therearenoclearrequirementsforcalculationandcontrolofstructuralhorizontaldisplacementunderverticalloads.Theeffectofverticalloadonthehorizontaldisplacementdoesnotneedtobeconsideredindesignofconventionalhigh-risebuildings,butforthebuildingswithhigh-positionlargecantilever,theve
4、rticalloadonthecantileverhasagreatimpactonthehorizontaldisplacementofthestructure.Takingaprojectasanexample,thehorizontaldisplacementofsuperhigh-riseframe-corewal1structureswithhigh-positionlargecantileverwasanalyzed,mainlyincludingitshorizontaldisplacementcharacteristics,impactoffloorstiffnessonho
5、rizontaldisplacement,anddeformationcoordinationbetweencorewallandframe.Thesefeatureswereobviouslydifferentfromthoseofconventionalhigh-risebuildings.Onthebasisofanalysis,methodswereputforwardforhorizontaldisplacementcontrolandinterlayerdisplacementanglecontrolonsuperhigh-riseframc-corcwallstructures
6、withhigh-positionlargecantilever?Somekeypointsandcorrespondingsuggestionsweresummarizedforhigh-risebuildingswithhigh-positionlargecantilever.Keyword:high-positionlargecantilever;verticalload;horizontaldisplacement;slabrigidity;0引言《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》(JGJ3—2010)Ill(簡(jiǎn)稱(chēng)高規(guī))規(guī)定了在正常使用條件下,高層建筑應(yīng)具有足夠的剛度,避免產(chǎn)生過(guò)大的位移
7、而影響結(jié)構(gòu)的承載力、穩(wěn)定性和使用耍求;高規(guī)規(guī)定了風(fēng)荷載及地震作用下樓層最大層間位移與層高之比的限值,規(guī)定了懸挑結(jié)構(gòu)位移計(jì)算中,懸挑部位的樓層宜考慮樓板平面內(nèi)的變形,但是高規(guī)中沒(méi)有對(duì)豎向荷載作用下結(jié)構(gòu)水平位移計(jì)算和控制做出明確要求。對(duì)于常規(guī)結(jié)構(gòu)來(lái)說(shuō),豎向荷載對(duì)于結(jié)構(gòu)水平位移的影響是可以忽略的。帶高位大懸挑的高層建筑一般具有懸挑長(zhǎng)度大、懸挑部位豎向荷載大的特點(diǎn),結(jié)構(gòu)形式一般為懸挑大桁架m,或者為懸挑桁架結(jié)合下部斜