本文選題：鋼筋混凝土橋墩　切入點(diǎn)：約束箍筋　出處：《橋梁建設(shè)》2014年06期

【摘要】：針對(duì)地震作用下鋼筋混凝土橋墩的變形能力要求,研究橋墩潛在塑性鉸區(qū)約束箍筋的用量問題。借助美國(guó)PEER柱抗震性能試驗(yàn)數(shù)據(jù)庫,整理了35根彎剪破壞墩柱的擬靜力試驗(yàn)數(shù)據(jù),通過統(tǒng)計(jì)分析評(píng)價(jià)我國(guó)橋梁抗震設(shè)計(jì)原《公路工程抗震設(shè)計(jì)規(guī)范》(JTJ 004-89)和現(xiàn)行《公路橋梁抗震設(shè)計(jì)細(xì)則》(JTG/T B02-01-2008)中最低約束箍筋用量對(duì)保證橋墩變形能力的可靠性,并與美國(guó)、歐洲主要橋梁抗震設(shè)計(jì)規(guī)范進(jìn)行對(duì)比,之后建立了具有85%保證率的彎剪破壞橋墩極限位移角計(jì)算公式。研究結(jié)果表明:以2%橋墩極限位移角為評(píng)價(jià)目標(biāo),現(xiàn)行《公路橋梁抗震設(shè)計(jì)細(xì)則》滿足橋墩變形能力要求;而以3%橋墩極限位移角為評(píng)價(jià)目標(biāo),該規(guī)范配箍要求略偏于不安全,在高地震危險(xiǎn)區(qū)橋墩抗震設(shè)計(jì)時(shí)應(yīng)予以注意。
[Abstract]:According to the deformation capacity requirement of reinforced concrete pier under earthquake, the problem of the amount of confined stirrups in the potential plastic hinge region of bridge pier is studied. The pseudostatic test data of 35 flexural shear failure columns were collected. Through statistical analysis and evaluation of the reliability of the minimum amount of stirrups in the original "Code for Seismic Design of Highway Engineering" (JTJ004-89) and the current "rules for Seismic Design of Highway Bridges" (JTG / T B02-01-2008) to ensure the deformation capacity of bridge piers, Compared with the code for seismic design of main bridges in Europe, a formula for calculating the ultimate displacement angle of pier with 85% guarantee rate is established. The results show that the limit displacement angle of 2% bridge pier is regarded as the evaluation target. The present detailed rules for Seismic Design of Highway Bridges meet the requirements of deformation capacity of piers, but with the limit displacement angle of 3% piers as the evaluation target, the requirement of hoop in this code is slightly less safe, and attention should be paid to the seismic design of piers in high seismic risk areas.
【作者單位】： 華北水利水電大學(xué)水利學(xué)院;大連海事大學(xué)道路與橋梁工程研究所;
【基金】：國(guó)家自然科學(xué)基金青年基金項(xiàng)目(51408223);國(guó)家自然科學(xué)基金項(xiàng)目(51178071,51008041) 教育部新世紀(jì)優(yōu)秀人才支持計(jì)劃資助項(xiàng)目(NCET-12-0751) 遼寧省高等學(xué)校優(yōu)秀人才資助計(jì)劃(LJQ2013053)~~
【分類號(hào)】：U443.22

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本文編號(hào)：1694458