【摘要】：我國(guó)是一個(gè)地震多發(fā)的國(guó)家,大面積的國(guó)土處于強(qiáng)震頻發(fā)的地帶,因此抗震是工程領(lǐng)域非常重要的問(wèn)題。減隔震技術(shù)在橋梁工程抗震領(lǐng)域應(yīng)用越來(lái)越廣泛,粘滯阻尼器以其良好的抗震性能及適用性成為大跨度橋梁控制地震響應(yīng)的較好選擇。論文介紹了粘滯阻尼器的分類,各類粘滯阻尼器的特點(diǎn)及其耗能原理,分析粘滯阻尼器的恢復(fù)力模型,并討論了設(shè)置粘滯阻尼器的橋梁結(jié)構(gòu)抗震理論分析方法。根據(jù)簡(jiǎn)化的非線性Maxwell模型,確定粘滯阻尼器的關(guān)鍵參數(shù)研究對(duì)象為阻尼系數(shù)C。傳統(tǒng)的參數(shù)敏感分析法能夠有效地得到橋梁粘滯阻尼器的最優(yōu)參數(shù)組合,但存在計(jì)算及數(shù)據(jù)處理工作量大、耗時(shí)長(zhǎng)、效率低下等問(wèn)題。因此論文采用隨機(jī)振動(dòng)理論,得到單自由度振動(dòng)系統(tǒng)最優(yōu)阻尼比及其對(duì)應(yīng)的阻尼系數(shù)理論公式,采用能量等效理論,進(jìn)一步得到非線性粘滯阻尼器的最優(yōu)阻尼系數(shù)的表達(dá)式。以某連續(xù)梁橋?yàn)楣こ虒?shí)例,采用有限元分析軟件MIDAS/CIVIL 2013建立其有限元模型,分析動(dòng)力特性,計(jì)算得到優(yōu)化阻尼系數(shù)。采用非線性時(shí)程分析法,驗(yàn)證基于隨機(jī)振動(dòng)理論粘滯阻尼器參數(shù)優(yōu)化方法的正確性。對(duì)論文所研究的粘滯阻尼器優(yōu)化設(shè)計(jì),從結(jié)構(gòu)設(shè)計(jì)、粘滯介質(zhì)和密封三個(gè)方面來(lái)進(jìn)行探討,分別提出優(yōu)化建議。
[Abstract]:China is an earthquake-prone country, and a large area of land is in the area of frequent strong earthquakes, so aseismic is a very important problem in the field of engineering. Seismic isolation technology is more and more widely used in the seismic field of bridge engineering. Viscous damper has become a better choice for controlling seismic response of long-span bridges because of its good seismic performance and applicability. This paper introduces the classification of viscous dampers, the characteristics of all kinds of viscous dampers and their energy dissipation principles, analyzes the restoring force model of viscous dampers, and discusses the seismic theoretical analysis method of bridge structures with viscous dampers. According to the simplified nonlinear Maxwell model, the key parameter of viscous damper is the damping coefficient C. The traditional parametric sensitivity analysis method can effectively get the optimal parameter combination of bridge viscous dampers, but there are some problems such as large amount of calculation and data processing, long time consumption, low efficiency and so on. In this paper, the optimal damping ratio of single degree of freedom vibration system and the corresponding theoretical formula of damping coefficient are obtained by using random vibration theory, and the expression of optimal damping coefficient of nonlinear viscous damper is obtained by using the energy equivalent theory. Taking a continuous beam bridge as an engineering example, the finite element model of a continuous beam bridge is established by using the finite element analysis software MIDAS/CIVIL 2013. The dynamic characteristics are analyzed and the optimum damping coefficient is calculated. The nonlinear time-history analysis method is used to verify the correctness of the parameter optimization method based on random vibration theory for viscous dampers. The optimization design of viscous damper studied in this paper is discussed from three aspects: structure design, viscous medium and seal.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李宏男,閻石;中國(guó)結(jié)構(gòu)控制的研究與應(yīng)用[J];地震工程與工程振動(dòng);1999年01期

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本文編號(hào)：2300764