本文選題：TID + TVMD��； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：橋梁作為生命線工程的關(guān)鍵節(jié)點(diǎn),一旦發(fā)生地震破壞將會(huì)帶來(lái)巨大的社會(huì)危害。在實(shí)際工程中,常通過(guò)采用阻尼器裝置吸收、耗散傳遞到主結(jié)構(gòu)上的地震能量,進(jìn)而實(shí)現(xiàn)橋梁減震的目的。慣質(zhì)類調(diào)諧阻尼器(TIBD)是一類可以將裝置實(shí)際質(zhì)量放大千倍,利用慣性力和調(diào)諧效應(yīng)來(lái)實(shí)現(xiàn)橋梁減震的新型阻尼器裝置,調(diào)諧粘滯質(zhì)量阻尼器(TVMD)和調(diào)諧慣質(zhì)阻尼器(TID)均屬于該類新型阻尼器裝置。本文將以連續(xù)梁橋作為研究對(duì)象,分析上述兩種TIBD裝置的參數(shù)優(yōu)化及減震性能,主要內(nèi)容如下:(1)在已有連續(xù)梁橋建模方法的基礎(chǔ)上,將一座典型3跨連續(xù)梁橋簡(jiǎn)化為雙自由度簡(jiǎn)化模型和多自由度精細(xì)模型兩種不同精度的減震分析模型,為研究?jī)煞NTIBD裝置(TVMD、TID)對(duì)連續(xù)梁橋的減震性能提供模型基礎(chǔ)。以單自由度結(jié)構(gòu)為分析模型,分析了 TVMD、TID的高效減震機(jī)理,將TIBD裝置的出力分為彈性力、阻尼力兩部分,并推導(dǎo)出兩種裝置彈性、阻尼出力時(shí)等效剛度和等效阻尼的計(jì)算公式。對(duì)比分析了 TVMD、TID的等效彈性力、等效阻尼力對(duì)減震性能的影響。(2)從雙自由度簡(jiǎn)化模型入手,以從外激勵(lì)輸入到結(jié)構(gòu)關(guān)鍵響應(yīng)的動(dòng)力放大系數(shù)為評(píng)價(jià)指標(biāo)對(duì)阻尼器參數(shù)進(jìn)行優(yōu)化設(shè)計(jì),分析研究了主結(jié)構(gòu)、阻尼器參數(shù)對(duì)減震性能的影響。然后從多自由度精細(xì)模型出發(fā),基于順橋向、橫橋向兩種減震分析的典型狀態(tài),采用基于H2性能的梯度法對(duì)阻尼器參數(shù)進(jìn)行優(yōu)化設(shè)計(jì),并與傳統(tǒng)粘滯阻尼器的減震性能進(jìn)行對(duì)比,研究TIBD裝置對(duì)于連續(xù)梁橋多階模態(tài)減震的高效性。研究表明,兩種TIBD裝置可實(shí)現(xiàn)對(duì)連續(xù)梁橋單階、多階模態(tài)響應(yīng)的顯著減震效果。(3)考慮阻尼器減震性能會(huì)受結(jié)構(gòu)動(dòng)力特性的影響,分別建立墩高、跨徑不同的連續(xù)梁橋精細(xì)模型,分析墩高、跨徑等結(jié)構(gòu)因素對(duì)TIBD裝置高效減震性能的影響,研究表明,TIBD裝置對(duì)不同動(dòng)力特性的連續(xù)梁橋均具有較好的減震效果,但減震性能會(huì)隨墩高、跨徑的增加而有所降低。最后建立一座典型5跨連續(xù)梁橋多自由度精細(xì)模型分析兩種TIBD裝置的減震性能,研究表明TIBD裝置對(duì)于5跨5連續(xù)梁橋同樣具有高效減震性能。
[Abstract]:Bridge as the key node of lifeline engineering, once the earthquake damage will bring huge social harm. In practical engineering, the seismic energy transmitted to the main structure is often absorbed and dissipated by means of dampers, and then the purpose of bridge damping is realized. Inertial tuned damper (TIBD) is a new type of damper which can amplify the actual mass of the device by thousands of times and use inertial force and tuning effect to achieve bridge vibration absorption. Tuned viscous mass dampers (TVMD) and tuned inertial mass dampers (TID) belong to these new dampers. In this paper, continuous beam bridge is taken as the research object to analyze the parameter optimization and vibration absorption performance of the two TIBD devices. The main contents are as follows: (1) based on the existing modeling methods of continuous beam bridge, A typical 3-span continuous beam bridge is simplified into two kinds of vibration absorption analysis models with different precision, namely the simplified model of two degrees of freedom and the fine model of multiple degrees of freedom, which provides a model basis for studying the seismic absorption performance of two TIBD devices (TVMD-TID) for continuous beam bridges. Taking the single degree of freedom structure as an analytical model, the mechanism of high efficiency vibration absorption of TVMD-TID is analyzed. The output force of TIBD device is divided into two parts: elastic force and damping force, and the formulas for calculating the elasticity, equivalent stiffness and equivalent damping of the two devices are derived. The effects of the equivalent elastic force and the equivalent damping force on the damping performance of TID are compared and analyzed. (2) starting with the simplified model of two degrees of freedom, The dynamic magnification factor from the external excitation input to the key response of the structure is taken as the evaluation index to optimize the design of the damper parameters. The influence of the main structure and the damper parameters on the damping performance is analyzed and studied. Then based on the multi-degree-of-freedom fine model, based on the typical state of two kinds of vibration absorption analysis, the H _ 2 performance gradient method is used to optimize the design of damper parameters. Compared with the traditional viscous dampers, the high efficiency of TIBD device for multi-mode vibration absorption of continuous beam bridges is studied. The results show that the two TIBD devices can achieve significant seismic absorption effects on single and multi-order modal responses of continuous beam bridges. (3) considering that the damping performance of dampers will be affected by the dynamic characteristics of the structure, the fine models of continuous beam bridges with different spans and piers are established, respectively. The influence of structural factors such as pier height and span on the seismic performance of TIBD device is analyzed. The results show that the TIBD device has better seismic absorption effect on continuous beam bridges with different dynamic characteristics, but the seismic absorption performance will decrease with the increase of pier height and span. Finally, a multi-degree-of-freedom fine model of a typical 5-span continuous beam bridge is established to analyze the vibration absorption performance of two TIBD devices. The results show that the TIBD device has the same high performance for the 5-span continuous beam bridge.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U442.55

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