本文選題：預(yù)制橋墩　切入點(diǎn)：自復(fù)位　出處：《北京工業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著我國交通基礎(chǔ)設(shè)施建設(shè)的推進(jìn),在未來的幾十年內(nèi)將有大批橋梁面臨改建和替換。橋梁重建勢必會影響既有道路上的車輛通行,帶來較大的社會成本。因而發(fā)展一種快速橋梁建造技術(shù)勢在必行。預(yù)制拼裝技術(shù)采用工廠化生產(chǎn)、現(xiàn)場拼裝回避了大量的現(xiàn)場工序,能夠?qū)崿F(xiàn)橋梁的快速施工。而且預(yù)制拼裝技術(shù)能有效控制施工質(zhì)量并減少對現(xiàn)場周邊的干擾使其成為未來的發(fā)展趨勢。目前,橋梁上部結(jié)構(gòu)的預(yù)制技術(shù)已經(jīng)比較成熟,但橋梁下部結(jié)構(gòu)卻很少采用預(yù)制技術(shù)。而且現(xiàn)存預(yù)制下部結(jié)構(gòu)橋梁大都位于低烈度區(qū)。由于起重、運(yùn)輸限制橋墩只能分節(jié)段預(yù)制。預(yù)制節(jié)段間的連接部分在地震的作用下可能會成為薄弱點(diǎn)發(fā)生破壞,這大大限制了預(yù)制橋墩在工程中的應(yīng)用。國內(nèi)對預(yù)制拼裝橋墩的地震響應(yīng)機(jī)理研究較少,對于連接構(gòu)造的設(shè)計(jì)與施工方法尚處于探索階段。隨著抗震技術(shù)的發(fā)展,除了抗震安全性能,工程界還對結(jié)構(gòu)的震后損傷、殘余變形等方面提出了更高的要求。以往研究表明,設(shè)計(jì)合理的連接構(gòu)造能使預(yù)制橋墩具有比傳統(tǒng)現(xiàn)澆橋墩更優(yōu)秀的抗震性能。本文以震后低損傷、低殘余變形為目標(biāo),設(shè)計(jì)了一種基于摩擦自鎖原理的預(yù)制橋墩連接構(gòu)造。并采用有限元軟件ABAQUS對摩擦自鎖式連接構(gòu)造進(jìn)行了三維仿真建模。并對關(guān)鍵設(shè)計(jì)參數(shù)對連接構(gòu)造滯回性能、部件應(yīng)力的影響進(jìn)行了研究。然后,基于實(shí)際應(yīng)用對摩擦自鎖式連接構(gòu)造的設(shè)計(jì)細(xì)節(jié)進(jìn)行了優(yōu)化。最后,對摩擦自鎖式連接構(gòu)造在實(shí)際地震作用下的響應(yīng)進(jìn)行了初步分析。結(jié)果表明,本文設(shè)計(jì)的摩擦自鎖式連接構(gòu)造基本能夠?qū)崿F(xiàn)震后低損傷、低殘余變形的設(shè)計(jì)目標(biāo)。初步驗(yàn)證了其實(shí)際應(yīng)用的可行性。
[Abstract]:With the development of transportation infrastructure in our country, a large number of bridges will be rebuilt and replaced in the coming decades. The reconstruction of bridges will inevitably affect the traffic on the existing roads. Therefore, it is imperative to develop a kind of rapid bridge construction technology. The prefabricated assembly technology adopts factory production, and the on-site assembly avoids a large number of on-site processes. It can realize the rapid construction of the bridge, and the prefabricated assembling technology can effectively control the construction quality and reduce the interference to the surrounding of the site so that it becomes the future development trend. At present, the prefabrication technology of the superstructure of the bridge has been more mature. However, prefabricated technology is rarely used in the substructure of the bridge. Moreover, most of the existing prefabricated substructure bridges are located in low-intensity areas. The piers can only be precast in segments. The connection between the prefabricated segments may become a weak spot in the event of an earthquake. This greatly limits the application of prefabricated piers in engineering. There are few researches on the seismic response mechanism of prefabricated piers in China, and the design and construction methods of connecting structures are still in the exploratory stage. In addition to seismic safety performance, the engineering community has also put forward higher requirements for post-earthquake damage and residual deformation of structures. The prefabricated piers have better seismic performance than the traditional cast-in-place piers with reasonable connection design. This paper aims at low damage and low residual deformation after the earthquake. A prefabricated pier connection structure based on friction self-locking principle is designed, and the three-dimensional simulation modeling of friction self-locking connection structure is carried out by using finite element software ABAQUS. The influence of component stress is studied. Then, based on the practical application, the design details of friction self-locking connection are optimized. The response of friction self-locking connection structure under actual earthquake is analyzed. The results show that the friction self-locking connection structure designed in this paper can basically achieve low damage after earthquake. The design goal of low residual deformation. The feasibility of its practical application is preliminarily verified.
【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U443.22;U442.55
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本文編號：1682998