本文選題：預(yù)制水泥混凝土板 + 快速修復(fù)��； 參考：《東南大學(xué)》2015年碩士論文

【摘要】：預(yù)制水泥混凝土板(Precast Concrete Slab,簡(jiǎn)稱(chēng)PCS)快速修復(fù)水泥混凝土路面技術(shù)是采用預(yù)制板對(duì)原水泥混凝土路面破損部位進(jìn)行替換的新型修復(fù)技術(shù),板塊的澆筑、養(yǎng)護(hù)等工序在后場(chǎng)完成,現(xiàn)場(chǎng)僅進(jìn)行吊裝及接縫處理,僅需4-6小時(shí)即可開(kāi)放交通。該技術(shù)具有開(kāi)放交通快、養(yǎng)護(hù)成本低、環(huán)境影響小、氣候適應(yīng)性強(qiáng)、交通安全性高等優(yōu)點(diǎn)。但是,目前國(guó)內(nèi)對(duì)該技術(shù)研究較少,尚未形成可以指導(dǎo)實(shí)踐的路面結(jié)構(gòu)設(shè)計(jì)方法。因此,需要研究出與實(shí)際應(yīng)用相適應(yīng)的結(jié)構(gòu)設(shè)計(jì)方法,為工程應(yīng)用提供一定的理論依據(jù)。論文采用有限元分析方法,分析了靜載及動(dòng)載作用下PCS路面結(jié)構(gòu)力學(xué)響應(yīng)及接縫傳荷能力,研究了PCS荷載疲勞應(yīng)力,分析了PCS施工吊裝時(shí)的受力情況及吊裝方法,提出了基于可靠度理論的PCS結(jié)構(gòu)設(shè)計(jì)方法。首先,論文分析了靜載作用下PCS結(jié)構(gòu)力學(xué)響應(yīng)及接縫傳荷能力。論文運(yùn)用有限元軟件ABAQUS中的Standard模塊建立了路面結(jié)構(gòu)三維有限元模型,數(shù)值模擬了靜載作用下PCS的應(yīng)力及位移,確定了預(yù)制水泥混凝土板臨界荷位,分析了靜載作用下路面結(jié)構(gòu)力學(xué)響應(yīng)和接縫傳荷能力的參數(shù)敏感性。其次,論文分析了動(dòng)載作用下PCS結(jié)構(gòu)力學(xué)響應(yīng)及接縫傳荷能力。論文運(yùn)用有限元軟件ABAQUS中的Explicit模塊建立路面結(jié)構(gòu)三維有限元模型,采用FORTRAN語(yǔ)言編寫(xiě)了用戶(hù)子程序VDLOAD模擬移動(dòng)恒載并在ABAQUS中調(diào)用分析,數(shù)值模擬了動(dòng)載作用下PCS的應(yīng)力及位移,確定了預(yù)制水泥混凝土路面最不利行車(chē)軌跡,分析了動(dòng)載作用下路面結(jié)構(gòu)力學(xué)響應(yīng)和接縫傳荷能力的參數(shù)敏感性,并對(duì)動(dòng)、靜力模型進(jìn)行了對(duì)比分析。再次,論文研究了PCS荷載疲勞應(yīng)力。論文運(yùn)用正交設(shè)計(jì)方法及多元統(tǒng)計(jì)回歸方法回歸出PCS最大荷載應(yīng)力公式;研究了考慮基層強(qiáng)度下降的荷載疲勞應(yīng)力；同時(shí)回歸出PCS最大豎向位移公式。然后,論文分析了PCS施工吊裝時(shí)的受力情況及吊裝方法。論文采用平面桿系分析方法對(duì)PCS吊裝進(jìn)行了強(qiáng)度分析,并運(yùn)用ABAQUS建立三維吊裝模型,數(shù)值模擬了吊裝過(guò)程中PCS的應(yīng)力,確定了合理的吊點(diǎn)個(gè)數(shù)及位置,建議了合理的吊裝方法及施工流程。最后,論文提出了基于可靠度的PCS結(jié)構(gòu)設(shè)計(jì)方法。論文在結(jié)合前面分析得到的荷載應(yīng)力計(jì)算方法與現(xiàn)行規(guī)范中溫度應(yīng)力計(jì)算方法的基礎(chǔ)上,提出了基于可靠度理論的考慮基層強(qiáng)度下降的PCS結(jié)構(gòu)設(shè)計(jì)方法,并給出了PCS結(jié)構(gòu)設(shè)計(jì)流程；通過(guò)實(shí)例,對(duì)比分析了規(guī)范方法與論文方法的計(jì)算結(jié)果及各自的適用范圍。
[Abstract]:Prefabricated cement concrete slab (Precast Concrete lablab) is a new type of repairing technology which uses prefabricated board to replace the damaged part of the original cement concrete pavement. The construction and maintenance of the slab are completed in the rear court. It only takes 4-6 hours to open traffic. The technology has the advantages of fast open traffic, low maintenance cost, low environmental impact, strong climate adaptability and high traffic safety. However, at present, there are few researches on this technology in our country, and no practical pavement structure design method has been formed. Therefore, it is necessary to study the structural design method suitable for practical application, and to provide some theoretical basis for engineering application. In this paper, the finite element analysis method is used to analyze the mechanical response and joint load transfer capacity of PCS pavement structure under static and dynamic loads, the fatigue stress of PCS load is studied, and the stress situation and hoisting method of PCS construction hoisting are analyzed. The design method of PCS structure based on reliability theory is proposed. Firstly, the mechanical response and joint load transfer capacity of PCS structure under static load are analyzed. The three-dimensional finite element model of pavement structure is established by using Standard module of finite element software ABAQUS. The stress and displacement of PCS under static load are numerically simulated, and the critical loading position of precast cement concrete slab is determined. The parameter sensitivity of mechanical response and joint load transfer capacity of pavement structure under static load is analyzed. Secondly, the mechanical response of PCS structure under dynamic load and the capacity of joint load transfer are analyzed. In this paper, the three-dimensional finite element model of pavement structure is established by using the Explicit module of the finite element software ABAQUS, and the user subprogram VDLOAD is written by FORTRAN language to simulate the moving dead load and call the analysis in ABAQUS. The stress and displacement of PCS under dynamic load are numerically simulated. The most unfavorable driving path of precast cement concrete pavement is determined, and the sensitivity of the mechanical response of pavement structure and the load transfer capacity of joints under dynamic load is analyzed, and the dynamic and static models are compared and analyzed. Thirdly, the fatigue stress of PCS load is studied. In this paper, the PCS maximum load stress formula is regressed by orthogonal design method and multivariate statistical regression method, the load-fatigue stress considering the decrease of base strength is studied, and the PCS maximum vertical displacement formula is regressed at the same time. Then, the paper analyzes the force situation and hoisting method of PCS construction hoisting. In this paper, the strength of PCS hoisting is analyzed by the plane bar system analysis method, and the three-dimensional hoisting model is established by using ABAQUS. The stress of PCS in the hoisting process is numerically simulated, and the reasonable number and position of hoisting points are determined. The reasonable hoisting method and construction flow are suggested. Finally, a reliability based PCS structure design method is proposed. On the basis of the method of load stress calculation and the calculation method of temperature stress in current code, a design method of PCS structure based on reliability theory considering the decrease of base strength is put forward in this paper. The flow chart of PCS structure design is given, and the calculation results of the standard method and the paper method are compared and analyzed through an example.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U416.216

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