發(fā)布時間：2018-03-02 15:52

  本文選題：活動支座摩擦力　切入點：運動相互作用　出處：《煙臺大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：地震的發(fā)生對橋梁結(jié)構(gòu)的安全性具有極大的威脅,若橋梁在地震中受損而喪失使用功能,除了會造成人員傷亡與財產(chǎn)損失外,也會影響救災(zāi)搶險工作。因此研究橋梁結(jié)構(gòu)的震害,研究支座摩擦作用的不利影響,研究造價低、易于更換的減隔震裝置對減少地震損失、確保震后交通暢通具有重大的理論與實際意義。本文對支座對橋梁結(jié)構(gòu)的地震反應(yīng)進(jìn)行研究,重點分析橋墩間運動相互作用對連續(xù)梁橋彈塑性地震反應(yīng)的不利影響,并提出防止落梁、控制梁體位移且又不顯著增大橋梁結(jié)構(gòu)的地震反應(yīng)的新型減隔震裝置。地震中,活動支座的摩擦力可以通過主梁傳遞給固定支座墩,引起橋墩間運動相互作用,為研究這種相互作用對連續(xù)梁橋彈塑性地震反應(yīng)的影響,本文考慮地震時主梁和活動支座墩間的摩擦作用及橋墩可能進(jìn)入的塑性狀態(tài),建立不同墩高的連續(xù)梁橋有限元分析模型,利用非線性動態(tài)時程分析法進(jìn)行分析,對不同方案下的固定墩墩底最大曲率進(jìn)行底部分析,找出活動支座摩擦作用使固定支座墩抗震性能產(chǎn)生不利的情況,并進(jìn)一步分析各墩墩頂速度時程曲線,發(fā)現(xiàn)如果通過主梁傳遞的摩擦力的方向與固定支座墩本身的振動方向相同,則活動支座摩擦作用對固定支座墩的地震反應(yīng)起到不利的增大作用。研究橋墩間運動相互作用對連續(xù)梁橋彈塑性地震反應(yīng)的影響,對確保橋梁整體結(jié)構(gòu)具有足夠的抗震性能具有非常重要的意義。設(shè)置減隔震裝置是目前提高橋梁結(jié)構(gòu)抗震性能的一種有效措施。但是結(jié)構(gòu)的抗震設(shè)計思維多以單道防線為主,無法滿足橋梁結(jié)構(gòu)對抗震構(gòu)造措施耗能與強度的雙重要求。因此本文在現(xiàn)有構(gòu)造措施的基礎(chǔ)上,以“多道防線、功能分離、逐級生效”為原則,采用耗能構(gòu)件與強度構(gòu)件分離的設(shè)計方法,提出減震榫位移控制榫新型結(jié)構(gòu)體系。本文從理論上分析了減震榫位移控制榫的工作過程,并分析了每個階段的單元恢復(fù)力圖形。在有限元模擬上,本文以某一連續(xù)梁橋為工程背景,對比分析了五種情況下的有限元模型,發(fā)現(xiàn)減震榫位移控制榫比單道防線更有利于從耗能和強度上提高橋梁結(jié)構(gòu)的抗震性能。結(jié)合減震榫位移控制榫裝置的設(shè)計原理,對影響減震效果的主要參數(shù)的大小進(jìn)行調(diào)節(jié),研究參數(shù)的變化對橋梁結(jié)構(gòu)抗震性能的影響。減震榫位移控制榫新型結(jié)構(gòu)體系的提出對提高橋梁結(jié)構(gòu)的抗震能力和抗震水平有一定的參考價值。
[Abstract]:The occurrence of earthquake is a great threat to the safety of bridge structure. If the bridge is damaged in the earthquake and loses its function, it will cause casualties and property losses. Therefore, the earthquake damage of bridge structure, the adverse effect of bearing friction, the low cost and easy-to-replace isolation device can reduce the earthquake loss. It is of great theoretical and practical significance to ensure the smooth traffic after the earthquake. In this paper, the seismic response of the support to the bridge structure is studied, and the adverse effect of the dynamic interaction between the piers on the elastoplastic seismic response of the continuous beam bridge is analyzed. A new type of isolation device for preventing beam falling, controlling beam body displacement and not significantly increasing the seismic response of bridge structure is proposed. In earthquake, the friction of movable support can be transferred to the fixed support pier through the main beam. In order to study the effect of the interaction on the elastoplastic seismic response of continuous beam bridge, the friction between the main beam and the movable support pier and the plastic state that the pier may enter during the earthquake are considered in this paper. The finite element analysis model of continuous beam bridge with different piers height is established. The nonlinear dynamic time history analysis method is used to analyze the bottom of fixed pier bottom with maximum curvature under different schemes. Find out the unfavorable seismic behavior of the fixed support pier caused by the friction action of the movable support, and further analyze the velocity time history curve of the pier top. It is found that if the direction of friction transmitted through the main beam is the same as the vibration direction of the fixed bearing pier itself, Therefore, the frictional action of the movable support has an adverse effect on the seismic response of the fixed support pier, and the effect of the dynamic interaction between the piers on the elastoplastic seismic response of the continuous beam bridge is studied. It is very important to ensure that the whole bridge structure has enough seismic performance. It is an effective measure to improve the seismic performance of bridge structure by setting up the isolation device. However, the seismic design thinking of the structure is dominated by the single line of defense. It can not meet the dual requirements of energy consumption and strength of seismic structural measures for bridge structure. Therefore, based on the existing structural measures, the principle of "multi-defense lines, separation of functions, step by step effectiveness" is taken as the principle. Using the design method of separating the energy dissipation member from the strength member, a new structure system of the displacement control tenon of the damping tenon is proposed. The working process of the displacement control tenon of the damping tenon is analyzed theoretically in this paper. In the finite element simulation, a continuous beam bridge is taken as the engineering background, and the finite element models under five conditions are compared and analyzed. It is found that the damped displacement control tenon is better than the single line of defense in improving the seismic performance of the bridge structure in terms of energy dissipation and strength. Combined with the design principle of the mortise control device, the magnitude of the main parameters affecting the damping effect is adjusted. The influence of the change of parameters on the seismic performance of bridge structure is studied. The proposed new structural system with mortise displacement control tenon has certain reference value for improving the aseismic capacity and seismic level of bridge structure.
【學(xué)位授予單位】：煙臺大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 梁軒;杜建鑌;;采用減震榫橋梁非線性動力學(xué)分析計算方法[J];工程力學(xué);2016年04期

2 王常峰;包儀軍;陳興沖;丁明波;;活動支座狀態(tài)對橋梁彈塑性地震反應(yīng)的影響[J];公路交通科技;2015年03期

3 唐偉力;;典型橋梁抗震加固技術(shù)措施[J];中國公路;2014年21期

4 邱金亮;方水平;;減隔震技術(shù)在橋梁結(jié)構(gòu)設(shè)計中的應(yīng)用[J];黑龍江交通科技;2014年09期

5 孟兮;高日;李承根;;鐵路簡支梁橋中減震榫的設(shè)計及其減震性能研究[J];橋梁建設(shè);2014年03期

6 石巖;王東升;孫治國;;近斷層地震動下減隔震橋梁地震反應(yīng)分析[J];橋梁建設(shè);2014年03期

7 倪燕平;;低屈服點鋼阻尼器在高速鐵路簡支梁橋中的應(yīng)用研究[J];鐵道建筑;2013年06期

8 王常峰;朱春林;陳興沖;;活動支座摩擦作用對連續(xù)梁橋彈塑性地震反應(yīng)的影響[J];公路交通科技;2013年05期

9 臧登科;賀麗麗;顏志淼;;淺談消能減震技術(shù)在工程中的應(yīng)用[J];建筑結(jié)構(gòu);2013年S1期

10 趙闖;丁海平;;汶川地震中高原大橋落梁破壞分析[J];蘇州科技學(xué)院學(xué)報(工程技術(shù)版);2012年04期

相關(guān)博士學(xué)位論文 前1條

1 王常峰;橋梁結(jié)構(gòu)非線性地震反應(yīng)研究（支座摩擦·限位裝置·基礎(chǔ)非線性）[D];蘭州交通大學(xué);2010年

相關(guān)碩士學(xué)位論文 前5條

1 劉國欽;橋梁結(jié)構(gòu)抗震減災(zāi)對策研究[D];西南交通大學(xué);2016年

2 鄭銘;長橋限位墩防落梁抗震性能初步研究[D];重慶交通大學(xué);2015年

3 邢石磊;減震榫的耗能性能分析及試驗研究[D];北京交通大學(xué);2010年

4 陳浩;減震榫力學(xué)性能及其在橋梁減震中的應(yīng)用[D];北京交通大學(xué);2010年

5 景丹;減震榫簡支梁橋減震性能分析[D];北京交通大學(xué);2009年

，

本文編號：1557168