本文關(guān)鍵詞：高速鐵路橋墩等效塑性鉸長度研究　出處：《鐵道工程學(xué)報(bào)》2017年07期 　論文類型：期刊論文

  更多相關(guān)文章： 高速鐵路橋墩 等效塑性鉸長度 纖維截面梁柱單元 單軸本構(gòu)

【摘要】：研究目的:等效塑性鉸長度在墩柱的簡(jiǎn)化抗震設(shè)計(jì)中普遍用于預(yù)測(cè)墩頂?shù)臉O限水平位移。高速鐵路橋墩具有截面尺寸大、縱筋率較低等特點(diǎn),目前我國鐵路抗震設(shè)計(jì)規(guī)范未對(duì)橋墩的塑性鉸長度給出建議值,設(shè)計(jì)人員只能參考現(xiàn)有的經(jīng)驗(yàn)公式進(jìn)行抗震設(shè)計(jì),其適用性還不明確。本文基于9個(gè)高速鐵路圓端形橋墩擬靜力試驗(yàn)數(shù)據(jù),對(duì)多個(gè)橋墩進(jìn)行塑性鉸長度的參數(shù)分析,與多種設(shè)計(jì)規(guī)范進(jìn)行對(duì)比,旨在研究并提出適用于高鐵橋墩的塑性鉸長度公式,以方便橋墩抗震設(shè)計(jì)。研究結(jié)論:(1)利用纖維截面梁柱單元,采用修正Chang-Mander混凝土模型進(jìn)行分析,與試驗(yàn)曲線吻合良好;(2)橋墩高度和軸壓比對(duì)塑性鉸長度影響較大,鋼筋屈服強(qiáng)度與直徑對(duì)其影響較小;(3)相比于已有的規(guī)范公式,本文提出的公式可更為準(zhǔn)確地預(yù)測(cè)高鐵橋墩的塑性鉸長度;(4)該研究成果可用于高速鐵路橋梁的抗震設(shè)計(jì)與分析。
[Abstract]:Objective: To study the equivalent length of plastic hinge in pier simplified prediction ultimate displacement of pier top commonly used in seismic design. The high-speed railway bridge pier has large section size, lower longitudinal reinforcement ratio, the current code for seismic design of railway in our country is not on the plastic hinge length of the pier to a recommended design staff only for aseismic design of the existing empirical formula, its applicability is not clear. In this paper, 9 high-speed railway round end pier pseudo static test data based on the analysis of the parameters of the plastic hinge length of the pier, compared with a variety of design specifications, the plastic hinge length formula is to research and propose suitable for high-speed railway for the convenience of the pier, pier seismic design. The conclusion of the study: (1) the use of fiber cross section beam column element, using the modified Chang-Mander model of concrete is analyzed, in good agreement with the test curve; (2) the bridge pier height and axial compression ratio A greater impact on the plastic hinge length, steel yield strength and the diameter has little influence on it; (3) compared to the existing standard formula, this formula can more accurately predict the plastic hinge length of high-speed rail pier; (4) seismic design and analysis of the research results can be used for high-speed railway bridges.

【作者單位】： 武漢理工大學(xué);中南大學(xué);
【基金】：中國鐵路總公司重大課題(2013G002A1) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2017IVA027)
【分類號(hào)】：U443.22
【正文快照】： 研究結(jié)論:(1)利用纖維截面梁柱單元,采用修正Chang-Mander混凝土模型進(jìn)行分析,與試驗(yàn)曲線吻合良好;(2)橋墩高度和軸壓比對(duì)塑性鉸長度影響較大,鋼筋屈服強(qiáng)度與直徑對(duì)其影響較小;(3)相比于已有的規(guī)范公式,本文提出的公式可更為準(zhǔn)確地預(yù)測(cè)高鐵橋墩的塑性鉸長度;(4)該研究成果可用

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