本文關(guān)鍵詞：配置組合封閉箍筋RC疊合梁受力性能研究　出處：《中國(guó)建筑科學(xué)研究院》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 疊合梁 受力性能 組合封閉箍筋 疊合面滑移

【摘要】：在各類(lèi)裝配式混凝土建筑結(jié)構(gòu)中,鋼筋混凝土(RC)疊合梁都是樓蓋中主要的水平構(gòu)件,其受力性能對(duì)樓蓋結(jié)構(gòu)整體性能甚為重要。按中國(guó)現(xiàn)有規(guī)范要求,疊合梁預(yù)制部分在制作時(shí)應(yīng)伸出封閉箍筋,這給后澆混凝土中的縱向鋼筋的安裝帶來(lái)諸多不便。參照美國(guó)相關(guān)規(guī)范的做法,本文提出一種新的箍筋構(gòu)造形式—組合封閉箍筋：由帶135°彎鉤的開(kāi)口箍筋與其上面附加的封頂鋼筋共同組成。在疊合梁中應(yīng)用此種箍筋,能夠大大方便梁上部后澆層中縱向鋼筋的安裝,具有很高的工程應(yīng)用價(jià)值。為了推廣組合封閉箍筋在疊合梁中的使用,需對(duì)配置組合封閉箍筋的疊合梁的受力性能進(jìn)行系統(tǒng)的研究。 本文共設(shè)計(jì)了22個(gè)RC疊合梁試件,分別研究配置組合封閉箍筋疊合梁在受彎、受剪及受扭作用下的受力性能,通過(guò)對(duì)比分析得出以下結(jié)論： (1)配置組合封閉箍筋疊合梁的受彎性能與配置傳統(tǒng)封閉箍筋疊合梁基本相同,以受彎為主的疊合梁中,可以應(yīng)用組合封閉箍筋。 (2)配置組合封閉箍筋疊合梁的受剪承載力與配置傳統(tǒng)封閉箍筋疊合梁基本相同。剪跨比為2.62配置組合封閉箍筋的疊合梁,受疊合面滑移的影響較大,剪切破壞形態(tài)帶有滑移,與配置傳統(tǒng)封閉箍筋疊合梁略有不同；剪跨比為1.50的疊合梁的破壞形態(tài)與配置傳統(tǒng)封閉箍筋疊合梁基本相同。在保證受力過(guò)程中水平疊合面不先于斜截面發(fā)生破壞的前提下,彎剪作用下的疊合梁中可以應(yīng)用組合封閉箍筋。 (3)配置組合封閉箍筋疊合梁的受扭承載力與配置傳統(tǒng)封閉箍筋疊合梁基本相同。在達(dá)到峰值承載力之前,配置組合封閉箍筋疊合梁與配置傳統(tǒng)封閉箍筋疊合梁受扭性能基本相同。達(dá)到峰值承載力進(jìn)入下降段之后,配置單鉤組合箍筋的疊合梁的延性變差,梁上角部混凝土易于剝落,封頂鋼筋的900彎鉤有張開(kāi)趨勢(shì)；配置雙鉤組合箍筋疊合梁的性能與配置傳統(tǒng)封閉箍筋疊合梁基本相同。故承受單向扭矩的疊合梁中可以配置雙鉤組合箍筋；不建議配置單鉤組合箍筋,其性能有待進(jìn)一步研究。 (4)試驗(yàn)結(jié)果及其分析表明,對(duì)于彎、剪、扭單調(diào)作用下的配置組合封閉箍筋疊合梁,可以按照《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》GB50010-2010計(jì)算其受彎、受剪和受扭承載力。
[Abstract]:In all kinds of prefabricated concrete structures, reinforced concrete (RC) composite beam is in the floor level of the main component, the mechanical properties of the overall performance of the floor structure is very important. According to Chinese existing specifications, laminated beam prefabricated parts should be closed out in the production, the inconvenience of the longitudinal reinforcement for concrete in installation. According to the relevant norms of practice, this paper proposes a new structure form combined closed stirrup stirrup consists of: the opening cap and attached to the steel stirrups with 135 degree hook. The application of the stirrups in the composite beam, can greatly facilitate the upper beam longitudinal reinforcement after pouring in installation, has the very high value of engineering application. In order to promote the use in combination of closed stirrup composite beam, the combination of closed stirrup composite beam stress behavior of the system Research.
In this paper, 22 RC composite beam specimens were designed, and the mechanical properties of the composite closed hoop reinforced composite beams under bending, shear and torsion were studied respectively.
(1) the bending performance of the composite closed hoop reinforced composite beam is basically the same as that of the traditional closed stirrups composite beam. The combined closed stirrups can be applied to the composite beams with bending.
(2) allocation and combination of closed stirrup composite beams shear capacity and configuration of the traditional closed stirrup composite beam is basically the same. The shear span ratio of 2.62 combinations of closed laminated beams, affected by superposition of slip shear failure mode with large slip, and the configuration of the traditional closed stirrup composite beam a slightly different shear span ratio; failure form and configuration of 1.50 traditional composite beam closed composite beam is basically the same. Under the premise of ensuring the stress level in the process of lamination does not precede inclined section failure, can be combined closed stirrup flexural shear composite beam.
(3) allocation and combination of closed stirrup laminated beams subjected to torsion bearing capacity and configuration of the traditional closed stirrup composite beam is basically the same. Before the peak capacity, allocation and combination of closed stirrup composite beam and the configuration of the traditional closed stirrup composite beam under torsion performance is basically the same. After reaching into the decline of peak capacity, ductility the configuration of single hook combination stirrup composite beam variation, beam angle of the concrete is easy to peel, 900 hook cap steel open trend; configuration of composite beam stirrup hook combination performance and configuration of the traditional closed stirrup composite beam is basically the same. The configuration can bear the stirrup hook combination unidirectional torque superposition the beam is not recommended; configuration of single hook combined stirrups, further studies are needed to evaluate the performance.
(4) the test results and analysis show that bending, shear and torsional load-bearing capacity can be calculated according to < concrete structure design code >GB50010-2010 > for bending, shear and torsion combined beams.

【學(xué)位授予單位】：中國(guó)建筑科學(xué)研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU375.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 戴培君,宋建中,樊劍;疊合框架梁受力性能及疊合面破壞機(jī)理分析[J];長(zhǎng)沙交通學(xué)院學(xué)報(bào);1998年02期

2 洪敦樞;在純扭作用下矩形截面鋼筋混凝土構(gòu)件的試驗(yàn)研究[J];福州大學(xué)學(xué)報(bào);1981年02期

3 殷芝霖;鋼筋混凝土和預(yù)應(yīng)力混凝土組合梁迭合面的抗剪強(qiáng)度[J];工業(yè)建筑;1984年05期

4 李小紅;翼緣配開(kāi)口箍筋的鋼筋混凝土T形截面梁抗扭性能研究[J];四川建筑科學(xué)研究;1987年03期

5 洪敦樞;受純扭鋼筋混凝土組合截面梁的試驗(yàn)研究[J];福州大學(xué)學(xué)報(bào)(自然科學(xué)版);1985年02期

6 刁波,葉英華;集中荷載下采用開(kāi)口箍筋鋼筋混凝土梁斜截面抗剪強(qiáng)度試驗(yàn)分析[J];哈爾濱建筑工程學(xué)院學(xué)報(bào);1991年04期

7 殷芝霖;;鋼筋混凝土構(gòu)件的抗扭剛度[J];建筑結(jié)構(gòu);1981年03期

8 裝配整體梁板研究專(zhuān)題科研組;裝配整體梁板設(shè)計(jì)方法的試驗(yàn)研究[J];建筑結(jié)構(gòu)學(xué)報(bào);1982年06期

9 胡少偉;聶建國(guó);熊輝;;鋼-混凝土組合梁的受扭試驗(yàn)與分析[J];建筑結(jié)構(gòu)學(xué)報(bào);2006年04期

10 呂西林;范力;趙斌;;裝配式預(yù)制混凝土框架結(jié)構(gòu)縮尺模型擬動(dòng)力試驗(yàn)研究[J];建筑結(jié)構(gòu)學(xué)報(bào);2008年04期

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本文編號(hào)：1395876