本文選題：預應力碳纖維板 + 平板錨具�。� 參考：《華北水利水電大學》2017年碩士論文

【摘要】：預應力技術是20世紀混凝土結構工程領域最具有革命性的結構構思,已廣泛用于土木建筑工程。針對橋梁帶載加固后加補強材料應變(應力)滯后這一缺點,對碳纖維板先施加預應力然后對橋梁進行加固,可有效提高材料的利用價值,預應力碳纖維板加固技術有望從根本上解決了后加補強材料應變(應力)滯后問題。為了研發(fā)一個可靠、永久的預應力碳纖維板錨固系統(tǒng)和簡捷、有效的張拉系統(tǒng),并成功的應用于實際橋梁加固工程,論文主要進行了預應力碳纖維板加固用新型錨具研發(fā)與加固效果試驗驗證,主要研究內容與成果如下:(1)針對傳統(tǒng)采用萬能試驗機加載測定錨具錨固性能的不足之處,本文以實驗室長10m的鋼箱梁作為張拉臺座,開發(fā)了一套足尺張拉、錨固預應力碳纖維板錨固性能試驗裝置;(2)針對傳統(tǒng)傳統(tǒng)預應力碳纖維板平板錨具錨固性能不足的問題,研發(fā)一種帶圓齒紋粗糙面的新型平板錨具,具有機械性能好、錨固性能高等優(yōu)點;(3)對傳統(tǒng)的碳纖維板平板錨具的施工張拉方式進行改進,棄用張拉絲桿錨固張拉端錨固的方式,建立一種高效、便捷的預應力碳纖維板自錨方法;(4)對退役受損的預應力混凝土空心板梁進行靜載檢測評定,并應用自主研發(fā)的圓齒紋錨具及張拉自錨裝置對其進行加固評定。試驗結果表明采用圓齒紋錨具的張拉自錨系統(tǒng)能夠可靠的應用于實際加固工程;對比分析加固前后空心板梁的靜載試驗結果,進一步印證了預應力碳纖維板加固技術能夠抑制空心板梁撓度、應變的增長。
[Abstract]:Prestress technology is the most revolutionary structure conception in the field of concrete structure engineering in the 20th century, and has been widely used in civil engineering. Aiming at the disadvantage of the strain (stress) lag of the reinforced material after strengthening the bridge with load, the application of prestress to the carbon fiber slab and then the reinforcement of the bridge can effectively improve the utilization value of the material. It is expected that the prestressed carbon fiber sheet reinforcement technology will solve the problem of strain (stress) hysteresis after reinforcement. In order to develop a reliable, permanent prestressed carbon fiber slab Anchorage system and a simple and effective tension system, and successfully applied to the actual bridge reinforcement project, This paper mainly carries on the research and development of the new Anchorage used in the reinforcement of prestressed carbon fiber sheet and the experimental verification of the reinforcement effect. The main research contents and results are as follows: (1) aiming at the shortcomings of the traditional universal testing machine loading to determine the anchoring performance of the anchor. In this paper, a 10m long steel box girder is used as the tensioning pedestal, and a set of full-scale tensioning and anchoring test equipment for prestressed carbon fiber sheet Anchorage performance is developed, which aims at the problem of insufficient anchoring performance of traditional prestressed carbon fiber slab flat Anchorage. A new type of flat Anchorage with rough surface of round teeth is developed, which has the advantages of good mechanical properties and high anchoring performance. It improves the construction tensioning mode of the traditional CFRP flat Anchorage, and forgoes the anchoring method of anchoring the tensioning end with the tensioning rod. An efficient and convenient self-anchoring method for prestressed carbon fiber slabs is established. The static load detection and evaluation of prestressed concrete hollow slab beams with decommissioned damage are carried out, and the self-developed circular tooth thread anchors and tensioning self-anchoring devices are used to strengthen and evaluate them. The test results show that the tensioning self-anchoring system with circular tooth thread Anchorage can be reliably used in practical reinforcement projects, and the static load test results of hollow slab beams before and after reinforcement are compared and analyzed. It is further proved that prestressed carbon fiber reinforced concrete can restrain the deflection and strain growth of hollow slab beam.
【學位授予單位】：華北水利水電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U445.72

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本文編號：1782482