本文選題：緩粘結(jié)劑 + 緩粘結(jié)預(yù)應(yīng)力筋��； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：緩粘結(jié)預(yù)應(yīng)力技術(shù)是一種新型的預(yù)應(yīng)力技術(shù),它結(jié)合了無粘結(jié)預(yù)應(yīng)力和有粘結(jié)預(yù)應(yīng)力兩種技術(shù)的優(yōu)點(diǎn),同時(shí)克服了兩種技術(shù)的不足。緩粘結(jié)預(yù)應(yīng)力技術(shù)將無粘結(jié)的油脂代替以緩粘結(jié)材料,緩粘結(jié)材料早期不凝固,隨著齡期增長(zhǎng)逐漸硬化使鋼絞線和混凝土粘結(jié)在一起,最后成為類似有粘結(jié)的鋼絞線。這樣,達(dá)到了早期施工方便快捷,后期安全可靠的使用效果,是一種非常有前景的預(yù)應(yīng)力技術(shù)。緩粘結(jié)預(yù)應(yīng)力混凝土結(jié)構(gòu)主要包括緩粘結(jié)預(yù)應(yīng)力筋及結(jié)構(gòu)混凝土,論文主要對(duì)緩粘結(jié)預(yù)應(yīng)力結(jié)構(gòu)的特點(diǎn)、緩粘結(jié)預(yù)應(yīng)力筋、緩粘結(jié)劑及大直徑鋼絞線緩粘結(jié)預(yù)應(yīng)力技術(shù)等進(jìn)行研究。首先,闡述了緩粘結(jié)預(yù)應(yīng)力結(jié)構(gòu)的工作原理,并結(jié)合其工作原理,分析了緩粘結(jié)預(yù)應(yīng)力結(jié)構(gòu)的特點(diǎn)。在此基礎(chǔ)上,建立了相應(yīng)的設(shè)計(jì)與施工計(jì)算方法,為緩粘結(jié)預(yù)應(yīng)力預(yù)應(yīng)力體系的應(yīng)用奠定基礎(chǔ)。其次,以緩粘結(jié)預(yù)應(yīng)力筋為基礎(chǔ)引入了緩粘結(jié)劑(包括緩凝砂漿和緩凝樹脂),并分別對(duì)凝砂漿和緩凝樹脂的緩凝機(jī)理進(jìn)行了探討。在此基礎(chǔ)上研究了緩凝砂漿和緩凝樹脂的特點(diǎn),結(jié)合外包砂漿型緩粘結(jié)預(yù)應(yīng)力筋和外包樹脂型緩粘結(jié)預(yù)應(yīng)力筋的結(jié)構(gòu)和原理,對(duì)兩種緩粘結(jié)預(yù)應(yīng)力體系進(jìn)行了分析比較。同時(shí),分析了緩粘結(jié)劑的力學(xué)性能、摩阻系數(shù)、物理性質(zhì)、穩(wěn)定性等。分析了緩粘結(jié)預(yù)應(yīng)力混凝土梁中緩粘結(jié)預(yù)應(yīng)力筋張拉摩阻力的變化規(guī)律。然后,引入了大直徑預(yù)應(yīng)力鋼絞線,通過對(duì)大直徑預(yù)應(yīng)力鋼絞線的結(jié)構(gòu)分析,并且結(jié)合大直徑預(yù)應(yīng)力鋼絞線及緩粘結(jié)劑的特點(diǎn),將兩者結(jié)合起來,研究提出了一種新型預(yù)應(yīng)力結(jié)構(gòu)。最后,結(jié)合廣西某公路新建工程的特點(diǎn),以及結(jié)合緩粘結(jié)預(yù)應(yīng)力技術(shù)的適用條件,以廣西某公路工程一座大橋?yàn)槔?使用緩粘結(jié)預(yù)應(yīng)力技術(shù)對(duì)預(yù)應(yīng)力箱梁進(jìn)行優(yōu)化設(shè)計(jì),并分析了緩粘結(jié)預(yù)應(yīng)力技術(shù)經(jīng)濟(jì)效益和社會(huì)效益。
[Abstract]:Slow bonded prestressing is a new type of prestressing technology, which combines the advantages of unbonded prestressing and bonded prestressing, and overcomes the shortcomings of the two technologies. The technology of slow bond prestressing replaces the unbonded grease with the slow bonded material, which does not solidify early, and then harms gradually with the increase of age so that the steel strand and concrete bond together, and finally become similar to the bonded steel strand. In this way, the early construction is convenient and fast, the later safe and reliable use effect, it is a very promising prestressing technology. Slowly bonded prestressed concrete structure mainly includes slowly bonded prestressed tendons and structural concrete. Slow bonding agent and large diameter steel strands are studied. Firstly, the working principle of slowly bonded prestressed structure is expounded, and the characteristics of slowly bonded prestressed structure are analyzed in combination with its working principle. On this basis, the corresponding design and construction calculation methods are established, which lays a foundation for the application of slow bonded prestressed system. Secondly, the retarded binder (including retarded mortar and retarding resin) is introduced on the basis of retarded prestressing tendons, and the retarding mechanism of mortar and retarding resin is discussed respectively. On this basis, the characteristics of retarded mortar and retarding resin are studied. Combined with the structure and principle of external mortar type slowly bonded prestressing tendons and external resin type slow bonded prestressed tendons, two kinds of slow bonded prestressing systems are analyzed and compared. At the same time, the mechanical properties, friction coefficient, physical properties and stability of the retarded binder are analyzed. The variation law of tensile friction of slowly bonded prestressed concrete beams is analyzed. Then, the large diameter prestressed steel strand is introduced. The structure of the large diameter prestressed steel strand is analyzed, and combined with the characteristics of the large diameter prestressed steel strand and the slow binder, the two are combined together. A new type of prestressed structure is proposed. Finally, according to the characteristics of a new highway construction project in Guangxi and the suitable conditions of slow bonded prestressing force technology, a bridge of a highway project in Guangxi is taken as an example to optimize the design of prestressed box girder by using slow bond prestressing force technology. The economic and social benefits of slowly bonded prestressing are also analyzed.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.57

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