本文選題：駁船　切入點(diǎn)：橋墩　出處：《合肥工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：船撞橋墩是造成橋梁損毀的常見事故之一。精確地估算船撞事故中的沖擊力，能夠?qū)σ淮未彩鹿手袠蛄航Y(jié)構(gòu)的內(nèi)部響應(yīng)以及碰撞行為對(duì)橋梁結(jié)構(gòu)損傷的影響進(jìn)行可靠地評(píng)估，以便設(shè)計(jì)出能夠抵抗相應(yīng)影響的橋墩。在對(duì)船舶-橋墩碰撞事故進(jìn)行數(shù)值模擬計(jì)算時(shí)，之前的研究成果大多是在假定橋墩是剛性或彈性的前提下得出的，，沒有考慮船舶與橋墩之間的相互作用。實(shí)際上，在碰撞過程中，橋墩材料會(huì)由于吸收沖擊能量發(fā)生塑性變形而損壞；同時(shí)，延長(zhǎng)了船舶與橋墩之間相互作用的時(shí)間，因此，這種情況下估算出來的沖擊力有一定誤差。本文中，用ANSYS建立一種駁船-橋墩碰撞數(shù)值模型，橋墩建模時(shí)，混凝土材料采用HJC本構(gòu)模型，鋼筋采用塑性隨動(dòng)強(qiáng)化本構(gòu)模型，力求與實(shí)際橋墩特性相吻合。參考現(xiàn)有研究成果中的一些有效數(shù)據(jù)對(duì)模型進(jìn)行校準(zhǔn)。 文中主要計(jì)算：不同碰撞速度下剛性和彈塑性材料橋墩受到的沖擊力與船艏?jí)簼⑸疃�；不同碰撞速度與不同碰撞質(zhì)量下彈塑性材料橋墩受到的沖擊力、橋墩的內(nèi)部能量、橋墩頂部側(cè)向位移以及船艏?jí)簼⑸疃�；橋墩上部支撐重量不同時(shí)，橋墩的沖擊力和頂部側(cè)向位移。通過對(duì)計(jì)算結(jié)果的分析與研究，得出的結(jié)論可以為橋墩防撞設(shè)計(jì)提供一定的參考。同時(shí)，文中對(duì)橋梁防撞裝置的研究現(xiàn)狀也進(jìn)行了概述。
[Abstract]:Ship collision is one of the common accidents that cause bridge damage. Accurately estimating the impact force in a ship collision accident can reliably evaluate the internal response of the bridge structure and the impact of the collision behavior on the bridge structure damage. In order to design the pier which can resist the corresponding influence. In the numerical simulation of the ship-pier collision accident, most of the previous research results are based on the assumption that the pier is rigid or elastic. The interaction between the ship and the pier is not taken into account. In fact, during the collision, the material of the pier is damaged by plastic deformation resulting from the absorption of the shock energy; at the same time, the time of interaction between the ship and the pier is prolonged, so, In this paper, ANSYS is used to establish a barge-pier collision numerical model. When the pier is modeled, the concrete material is modeled by the HJC constitutive model, and the steel bar is built by the plastic follow-up strengthening constitutive model. The model is calibrated with some valid data from the existing research results. The main calculations are as follows: the impact force and depth of bow collapse of rigid and elastoplastic material pier under different impact velocities, the impact force of elastic and plastic material pier under different impact velocities and different collision masses, and the internal energy of pier, The lateral displacement at the top of the pier and the depth of the ship's bow collapse, the impact force of the pier and the lateral displacement at the top of the pier are different with the weight of the upper support of the pier. The conclusions can provide some reference for the design of bridge pier collision prevention. At the same time, the research status of bridge anti-collision device is also summarized in this paper.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U443.26;U441

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本文編號(hào)：1640567