本文選題：高速鐵路　切入點(diǎn)：空心橋墩　出處：《工程力學(xué)》2014年03期 　論文類型：期刊論文

【摘要】：以高速鐵路中采用的圓端形空心橋墩為原型,設(shè)計(jì)了10根大比例模型�？紤]恒定軸向力的作用,進(jìn)行低周反復(fù)荷載試驗(yàn),得到不同橋墩模型的破壞特性、滯回曲線,依此分析各參數(shù)下橋墩的延性及耗能性能,并利用兩種典型的抗剪公式對(duì)模型的抗剪承載力進(jìn)行評(píng)估。試驗(yàn)結(jié)果表明,該類橋墩均為彎曲型破壞,墩底普遍有彎剪斜裂縫。滯回曲線捏縮效應(yīng)明顯并且骨架曲線從開(kāi)裂到屈服上升緩慢。隨著軸壓比的提高,模型的彎曲強(qiáng)度有所增大,延性下降。由于模型的體積配箍率均較低,其對(duì)延性的影響不明顯�？v筋率對(duì)滯回曲線形狀影響較大,增加縱筋率耗能能力隨之增大。
[Abstract]:Round end by high-speed railway in the hollow pier as the prototype, designed 10 large scale model. Considering the constant axial force and cyclic loading test, failure characteristics of different pier models, hysteretic curve, ductility and energy dissipation performance based on the analysis results of the parameters under the pier, and used two the typical model of the shear formula of shear bearing capacity is evaluated. The experimental results show that this kind of pier is flexural failure, the bottom of the pier are flexural shear crack. The hysteretic curves and skeleton curves of obvious rheostriction from cracking to yield increased slowly. With the increase of axial compression ratio, bending strength the model increases, the ductility decreases. The volume ratio of hoop model are relatively low, the effect is not obvious. On the ductility of longitudinal reinforcement ratio on the hysteretic curve shape influence, the increase in longitudinal reinforcement increases rate of energy dissipation.

【作者單位】： 中南大學(xué)土木工程學(xué)院;高速鐵路建造技術(shù)國(guó)家工程實(shí)驗(yàn)室;
【基金】：鐵道部重大科技攻關(guān)項(xiàng)目(2009G-024) 國(guó)家留學(xué)基金項(xiàng)目(CSC)
【分類號(hào)】：U442.55

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相關(guān)期刊論文 前3條

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本文編號(hào)：1648187