【正文】 elp of large scale application softwareMIDAS, do the work of track slab and base reinforcement design and verification. Research method: Use the Finite Element Analysis to establish beamslabslab model of slab ballastless track ,and solve the model with the help of large scale application softwareMIDAS, do the work of track slab and base reinforcement design and verification. Research results: Sum up the force influence of the loading position, fastener stiffness, the width of track slab, CA mortar elastic modulus, foundation elastic coefficient and other major parameters， and seek the most unfavorable moment of track plate and base plate under vertical loads. Keywords： Slab ballastless track, Finite element, Beamslab model, Reinforcement I 目錄 1 緒論 ........................................................................................................................................ 1 無(wú)砟軌道概述 .............................................................................................................. 1 無(wú)砟軌道主要技術(shù)特點(diǎn) .............................................................................................. 1 世界各國(guó)無(wú)砟軌道發(fā)展情況 ...................................................................................... 4 國(guó)內(nèi)無(wú)砟軌道結(jié)構(gòu)研究與工程實(shí)踐 .......................................................................... 5 板式無(wú)砟軌道的結(jié)構(gòu)與類型 ...................................................................................... 7 2 我國(guó)的板式無(wú)砟軌道 .......................................................................................................... 15 我國(guó)客運(yùn)專線主要無(wú)砟軌道結(jié)構(gòu)型式介紹 ............................................................ 15 CRTSⅠ 型板式無(wú)砟軌道 ................................................................................. 15 CRTSⅡ 型板式無(wú)砟軌道 ................................................................................. 17 CRTSⅢ 型板式無(wú)砟軌道 ................................................................................. 19 CRTSⅠ 型雙塊式無(wú)砟軌道 ............................................................................. 19 CRTSⅡ 型雙塊式無(wú)砟軌道 ............................................................................. 21 岔區(qū)軌枕埋入式無(wú)砟軌道與岔區(qū)板式無(wú)砟軌道 .......................................... 21 板式軌道的技術(shù)要求 ................................................................................................ 22 板式無(wú)砟軌道設(shè)計(jì) .................................................................................................... 24 板式無(wú)砟軌道結(jié)構(gòu)設(shè)計(jì)原理 .................................................................................... 25 彈性地基梁理論 .............................................................................................. 25 彈性地基疊合梁理論 ...................................................................................... 26 梁－板－板彈性支承彎曲理論 ....................................................................... 28 梁－板－體彈性支承彎曲理論 ...................................................................... 28 3 板式無(wú)砟軌道的設(shè)計(jì)和計(jì)算 .............................................................................................. 29 MIDAS 介紹 ............................................................................................................... 29 模型的選擇 ................................................................................................................ 29 模型的建立 ................................................................................................................ 30 計(jì)算參數(shù) .................................................................................................................... 30 無(wú)砟軌道梁板模型的荷載工況 ................................................................................ 31 MIDAS 運(yùn)行結(jié)果及分析 ........................................................................................... 31 II 4 板式無(wú)砟軌道的底座和軌道板的配筋 .............................................................................. 38 設(shè)計(jì)原則及規(guī)范 ........................................................................................................ 38 計(jì)算原則 ........................................................................................................... 38 設(shè)計(jì)規(guī)范 ........................................................................................................... 38 計(jì)算方法 ........................................................................................................... 40 軌道板的配筋及驗(yàn)算 ................................................................................................ 41 軌道板縱向配筋 ............................................................................................... 41 軌道板橫向配筋 ............................................................................................... 43 混凝土底板配筋及驗(yàn)算 ............................................................................................ 44 混凝土底座縱向配筋 ....................................................................................... 44 混凝土底座橫向配筋 ....................................................................................... 46 結(jié)論 .......................................................................................................................................... 49 致謝 ............................................................................................................ 錯(cuò)誤 !未定義書(shū)簽。 研究結(jié)論： 軌下墊層剛度在 50～ 80kN/mm 范圍內(nèi)為宜， CA 砂漿彈性模量對(duì)鋼軌與軌道板及底座板的位移影響不是很明顯，地基彈性系數(shù)宜采用 190MPa/m， 通過(guò)建立路基上板式無(wú)柞軌道梁一板有限元模型計(jì)算得到的彎矩值，根據(jù)容許應(yīng)力法并結(jié)合上述彎矩值對(duì)無(wú)柞軌道混凝土底座進(jìn)行配筋計(jì)算。 研究方法：采用有限元理論，建立板式無(wú)砟軌道的梁 — 板 — 板模型，應(yīng)用大型有限元分析軟件 MIDAS 對(duì)模型進(jìn)行求解，并對(duì)軌道板和底座進(jìn)行配筋設(shè)計(jì)和校核。1 路基上板式無(wú)砟軌道設(shè)計(jì)及計(jì)算 摘要 研究目的：軌道是直接承受列車(chē)荷載作用并引導(dǎo)列車(chē)運(yùn)行的重要部分，因此軌道需要有足夠的強(qiáng)度和穩(wěn)定性。隨著高速鐵路的發(fā)展，有砟軌道因自身的缺點(diǎn)而無(wú)法適應(yīng)，因此需要設(shè)計(jì)合理的無(wú)砟軌道結(jié)構(gòu)來(lái)滿足高速鐵路對(duì)于高速度的要求。 研究結(jié)果：總結(jié)了荷載作用位置、扣件剛度、軌道板寬度、 CA 砂漿彈性模量、地基彈性系數(shù)等主要參數(shù)對(duì)軌道板、 CA 砂漿和底座的 受力影響規(guī)律，求得列車(chē)豎向荷載作用下軌道板和底座的最不利彎矩。計(jì)算結(jié)果表明，路基上板式無(wú)砟軌道混凝土底座的配筋主要由最小裂縫寬度決定。 參考文獻(xiàn) ................................................................................................