安慶鐵路長(zhǎng)江大橋基準(zhǔn)動(dòng)力有限元模型研究
發(fā)布時(shí)間:2018-11-17 09:05
【摘要】:文章探討了大跨度斜拉橋建模中的幾個(gè)關(guān)鍵問(wèn)題,即初始平衡構(gòu)型、斜拉索垂度效應(yīng)、恒載幾何非線性和正交異性橋面板簡(jiǎn)化,為安慶鐵路長(zhǎng)江大橋的基準(zhǔn)動(dòng)力有限元模型的建立提供指導(dǎo);介紹了該橋的現(xiàn)場(chǎng)環(huán)境振動(dòng)試驗(yàn)以及峰值法和隨機(jī)子空間法的模態(tài)參數(shù)識(shí)別結(jié)果。安慶鐵路長(zhǎng)江大橋有限元模型動(dòng)力特性的計(jì)算結(jié)果與實(shí)測(cè)結(jié)果吻合很好,表明建立的有限元模型可作為該橋的基準(zhǔn)動(dòng)力有限元模型。
[Abstract]:In this paper, several key problems in the modeling of long-span cable-stayed bridges are discussed, including initial equilibrium configuration, cable sag effect, geometric nonlinearity under dead load and simplification of orthotropic deck slab. It provides guidance for the establishment of the datum dynamic finite element model of Anqing Railway Yangtze River Bridge. The field vibration test of the bridge and the modal parameter identification results of peak value method and random subspace method are introduced. The calculated results of the finite element model of Anqing Railway Yangtze River Bridge are in good agreement with the measured results, which indicates that the established finite element model can be used as the reference dynamic finite element model of the bridge.
【作者單位】: 合肥工業(yè)大學(xué)土木與水利工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51508144) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(JZ2015HGBZ0098;JZ2015HGQC0215)
【分類號(hào)】:U441.3
[Abstract]:In this paper, several key problems in the modeling of long-span cable-stayed bridges are discussed, including initial equilibrium configuration, cable sag effect, geometric nonlinearity under dead load and simplification of orthotropic deck slab. It provides guidance for the establishment of the datum dynamic finite element model of Anqing Railway Yangtze River Bridge. The field vibration test of the bridge and the modal parameter identification results of peak value method and random subspace method are introduced. The calculated results of the finite element model of Anqing Railway Yangtze River Bridge are in good agreement with the measured results, which indicates that the established finite element model can be used as the reference dynamic finite element model of the bridge.
【作者單位】: 合肥工業(yè)大學(xué)土木與水利工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51508144) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(JZ2015HGBZ0098;JZ2015HGQC0215)
【分類號(hào)】:U441.3
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