發(fā)布時(shí)間：2018-07-12 14:25

  本文選題：連續(xù)梁橋 + 橋墩損傷　； 參考：《天津大學(xué)學(xué)報(bào)(自然科學(xué)與工程技術(shù)版)》2014年07期

【摘要】：為了平均分配連續(xù)梁橋各墩的損傷,提出了一種多墩聯(lián)合半主動(dòng)控制算法.該控制算法在主動(dòng)最優(yōu)控制力的基礎(chǔ)上,綜合考慮連續(xù)梁橋各墩的損傷狀態(tài),通過(guò)調(diào)整阻尼器的目標(biāo)出力,在主梁加速度和各橋墩的墩頂與主梁間相對(duì)位移得到控制的同時(shí),使各橋墩的損傷指數(shù)平均分配.本文以一設(shè)置了磁流變(MR)阻尼器的3跨連續(xù)梁橋?yàn)檠芯繉?duì)象,采用MATLAB進(jìn)行數(shù)值模擬分析,對(duì)所提出的半主動(dòng)控制算法進(jìn)行了多種工況下的驗(yàn)證.計(jì)算結(jié)果表明,采用多墩聯(lián)合半主動(dòng)控制算法能夠較好地控制橋梁的地震反應(yīng),同時(shí)有效降低破壞最嚴(yán)重的橋墩在強(qiáng)震過(guò)程中的損傷指數(shù),達(dá)到各橋墩損傷平均分配的效果.
[Abstract]:In order to evenly distribute the damage of each pier of continuous girder bridge, a combined semi-active control algorithm with multiple piers is proposed. Based on the active optimal control force, the damage state of each pier of continuous beam bridge is considered synthetically. By adjusting the target force of dampers, the acceleration of the main beam and the relative displacement between the pier top and the main beam of the bridge pier are controlled, at the same time, the acceleration of the main beam and the relative displacement between the pier top and the main beam of the bridge pier are controlled at the same time. The damage index of each pier is equally distributed. In this paper, a 3-span continuous beam bridge with magneto-rheological (Mr) damper is taken as the research object. MATLAB is used to carry out numerical simulation and analysis, and the proposed semi-active control algorithm is verified under a variety of working conditions. The results show that the multi-pier combined semi-active control algorithm can effectively control the seismic response of the bridge, and effectively reduce the damage index of the most severely damaged pier during the strong earthquake, and achieve the effect of equally distributing the damage of each pier.
【作者單位】： 天津大學(xué)濱海土木工程結(jié)構(gòu)與安全教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金重大研究計(jì)劃重點(diǎn)資助項(xiàng)目(90715032);國(guó)家自然科學(xué)基金國(guó)際合作項(xiàng)目(51021140003)
【分類號(hào)】：U442.55;U448.215

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本文編號(hào)：2117450