本文選題：拱肋　切入點(diǎn)：圓形鋼管混凝土　出處：《中外公路》2017年05期 　論文類型：期刊論文

【摘要】：由于鋼管與混凝土之間的黏結(jié)力非常有限,極易在節(jié)點(diǎn)處產(chǎn)生鋼管與混凝土界面滑移即脫黏,嚴(yán)重降低拱肋的承載能力。在鋼管混凝土拱肋內(nèi)置PBL加勁肋可提高節(jié)點(diǎn)處鋼管與混凝土界面黏結(jié)力,增強(qiáng)鋼管混凝土協(xié)同工作能力。該文以某鋼管混凝土拱橋?yàn)槔?對拱肋節(jié)點(diǎn)進(jìn)行了非線性分析,探討了PBL加勁肋對節(jié)點(diǎn)破壞形式、極限承載力、鋼管的應(yīng)力分布等力學(xué)性能的影響。結(jié)果表明:內(nèi)置PBL加勁肋可增強(qiáng)鋼管與混凝土界面黏結(jié)力,便于使拱上立柱產(chǎn)生的水平力由鋼管和混凝土共同承擔(dān),有效提高了節(jié)點(diǎn)承載力。內(nèi)置PBL加勁肋是對鋼管混凝土拱肋節(jié)點(diǎn)的一種有效改進(jìn)形式。
[Abstract]:Because the bond force between steel tube and concrete is very limited, it is easy to produce slippage of the interface between steel tube and concrete at the joint, that is, debonding. The bearing capacity of arch rib is seriously reduced. PBL stiffening rib built in concrete filled steel tube arch rib can increase the interface bond force between steel tube and concrete and enhance the cooperative working ability of concrete filled steel tube. A concrete filled steel tube arch bridge is taken as an example in this paper. The nonlinear analysis of arch ribbed joints is carried out, and the effects of PBL stiffeners on the mechanical properties of joints such as failure form, ultimate bearing capacity and stress distribution of steel pipe are discussed. The results show that the interfacial bond force between steel tube and concrete can be enhanced by adding PBL stiffener. It is convenient to make the horizontal force generated by the column on the arch bear the joint bearing capacity of steel tube and concrete and effectively improve the bearing capacity of the joint. The PBL stiffener is an effective improvement form for the arch rib joint of concrete-filled steel tube (CFST).
【作者單位】： 南陽理工學(xué)院;長安大學(xué)公路學(xué)院;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(編號:310821161004)
【分類號】：U441

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2 王桂芳;;具有凸緣加勁肋園孔的應(yīng)力分析[J];成都科技大學(xué)學(xué)報(bào);1987年04期

3 王卓琦,吳齊正;鋼管混凝土拱肋施工技術(shù)[J];華東公路;2003年04期

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本文編號：1634204