本文選題：客運專線 + 斜拉橋　； 參考：《應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報》2014年01期

【摘要】：以鐵路客運專線大跨斜拉橋?qū)嶋H工程為研究背景,探討了斜拉橋在縱、橫向不同的抗震體系下結(jié)構(gòu)的地震反應(yīng)特點.通過大量的非線性時程反應(yīng)分析,對黏滯液體阻尼器的布設(shè)位置及力學(xué)參數(shù)進行了優(yōu)化分析.結(jié)果表明,沿縱橋向在塔梁間設(shè)置黏滯液體阻尼器,并合理選擇阻尼器的力學(xué)參數(shù),可顯著降低主塔縱橋向的結(jié)構(gòu)內(nèi)力、塔頂位移以及塔梁間相對運動位移;沿縱橋向在塔梁間及輔助墩頂同時設(shè)置阻尼器則不僅可降低輔助墩及主塔的結(jié)構(gòu)內(nèi)力,還可有效提高塔頂位移及塔梁間相對運動位移的減震效果;沿橫橋向僅在過渡墩、輔助墩頂設(shè)置阻尼器可顯著降低過渡墩及輔助墩的墩身及其樁基礎(chǔ)的橫向地震反應(yīng).
[Abstract]:Based on the actual project of long-span cable-stayed bridge in railway passenger dedicated line, the characteristics of seismic response of cable-stayed bridge under different seismic systems are discussed. The location and mechanical parameters of viscous liquid dampers are optimized by a large number of nonlinear time-history response analysis. The results show that the viscous liquid dampers are arranged along the longitudinal bridge direction and the mechanical parameters of the dampers are reasonably selected. The internal force of the main tower longitudinal bridge the displacement of the tower top and the relative displacement between the towers and beams can be significantly reduced by the installation of viscous liquid dampers along the longitudinal bridge direction of the tower and the reasonable selection of the mechanical parameters of the dampers. Installing dampers along the longitudinal bridge direction at the same time between the tower beam and the top of the auxiliary pier can not only reduce the internal force of the auxiliary pier and the main tower, but also effectively improve the shock absorption effect of the tower top displacement and the relative movement displacement between the tower and beam. The installation of dampers at the top of auxiliary piers can significantly reduce the lateral seismic response of the piers and their foundations of transition piers and auxiliary piers.
【作者單位】： 蘭州交通大學(xué)甘肅省道路橋梁與地下工程重點實驗室;蘭州交通大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51368034,51068017) 長江學(xué)者和創(chuàng)新團隊發(fā)展計劃資助(IRT1139) 甘肅省高等學(xué)�；究蒲袠I(yè)務(wù)費項目
【分類號】：U448.27;U442.55

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