本文選題：植筋技術(shù) + 快凝特性��； 參考：《湖南大學(xué)》2015年碩士論文

【摘要】：二十世紀(jì)五十年代以來,建國初期建的很多既有建筑已經(jīng)進入“中老年期”,我國的基礎(chǔ)建設(shè)正從大量新建向部分新建部分維修轉(zhuǎn)型。因此,既有建筑設(shè)施的維修與加固正蓬勃發(fā)展。在維修加固技術(shù)中,植筋加固技術(shù)由于施工工藝簡單、效果理想,已經(jīng)成為加固技術(shù)中一個重要的方法。植筋加固技術(shù)是利用植筋膠將鋼筋植入結(jié)構(gòu)體內(nèi)的一種加固技術(shù)。傳統(tǒng)的植筋多采用有機材料,但普遍存在凝結(jié)時間長、耐高溫性能差、耐久性差,以及彈性模量低的局限性。為了解決有機植筋膠的上述問題,研制了一種新型快凝無機植筋膠。通過多組試驗確定其膠凝材料的配合比,使其符合試驗所需的抗壓強度及快凝特性。在試塊上植筋,在相應(yīng)條件下進行拉拔試驗,對比不同條件下的植筋極限拉拔承載力,分析各因素對拉拔強度的影響。根據(jù)拉拔試驗中植筋體的破壞現(xiàn)象,并查閱國內(nèi)外相關(guān)研究文獻,總結(jié)出無機植筋膠植筋的破壞形態(tài);根據(jù)拉拔試驗植筋體的極限拉拔承載力,總結(jié)出無機植筋膠極限拉拔承載力的計算公式。植筋常用于建筑加固工程中植入剪切銷釘。工程中植入剪切銷釘主要用來抗剪,這一量值與前面所述的極限拉拔承載力并無直接關(guān)系。本文為研究剪切力關(guān)系與極限拉拔承載力的關(guān)系,通過對在加固梁試件中的銷釘進行拉拔試驗來研究。為描述剪切銷釘質(zhì)量,給出其拉拔合格值的定義。相關(guān)的加固技術(shù)標(biāo)準(zhǔn)尚未涉及無機膠高溫下的性能,通過在混凝土試塊上分別采用有機膠和無機膠植筋,對比高溫條件下有機膠與無機膠的極限拉拔承載力,對無機膠的耐高溫性能進行分析。選擇在長沙的夏季做露天環(huán)境下距混凝土表面不同深度處的溫度測試試驗,測得結(jié)構(gòu)構(gòu)件處于自然正常工作環(huán)境下時植筋膠的工作溫度。將改進后更適合于實際情況的植筋膠應(yīng)用于郴州市某加固工程,其剪切銷釘采用無機植筋膠植入。通過抽樣檢測,得到梁、柱剪切銷釘?shù)臉O限拉拔承載力,植筋效果符合預(yù)期期望。
[Abstract]:Since the 1950s, many existing buildings built in the early days of the founding of the people's Republic of China have entered the "middle and old age period", and the basic construction of our country is transforming from a large number of new construction to part new partial maintenance. Therefore, the maintenance and reinforcement of existing building facilities is booming. In the maintenance and reinforcement technology, the reinforcement technology has become an important method because of its simple construction technology and ideal effect. Reinforcement is a kind of reinforcement technique which is used to implant steel bars into the body of the structure. Organic materials are often used in the traditional planting tendons, but there are many limitations such as long setting time, poor high temperature resistance, poor durability and low elastic modulus. In order to solve the above problems of organic gluten, a new type of fast coagulating inorganic gluten was developed. The compounding ratio of the cementing material was determined by multi-group tests to make it conform to the compressive strength and fast setting characteristic of the test. The ultimate pull-out capacity was compared under different conditions, and the influence of various factors on the pull-out strength was analyzed. According to the damage phenomenon of the tendon body in the drawing test, and referring to the domestic and foreign related research literature, the failure pattern of the inorganic gluing tendon was summarized, and the ultimate drawing capacity of the steel bar was obtained according to the drawing test. The calculation formula of ultimate drawing capacity of inorganic gluten was summarized. Rebars are often used to insert shear pins in building reinforcement projects. Shear pins are mainly used for shear resistance in engineering, which has no direct relation to the ultimate drawing capacity. In order to study the relationship between shear force and ultimate pull-out capacity, the pull-out test of pin in strengthened beam specimen is carried out in this paper. In order to describe the quality of shearing pin, the definition of drawing qualification value is given. The performance of inorganic adhesive at high temperature has not been involved in the relevant technical standards of reinforcement. The ultimate drawing capacity of organic adhesive and inorganic adhesive under high temperature is compared by using organic glue and inorganic glue to plant steel bar on concrete test piece. The high temperature resistance of inorganic adhesive was analyzed. The temperature test at different depths from the surface of concrete was conducted in summer in Changsha, and the working temperature of gluten was measured when the structure member was in the natural normal working environment. The modified gluten was applied to a reinforcement project in Chenzhou, and the shear pin was implanted with inorganic gluing glue. The ultimate pull-out capacity of shear pin is obtained by sampling test, and the effect of planting steel bar is in line with the expected expectation.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU37;TU746.3

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