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殷志祥， 張春喜
（遼寧工程技術(shù)大學(xué)建筑工程學(xué)院，阜新123000）[摘要] 平改立鐵路架空體系在改造工程中非常關(guān)鍵，一般應(yīng)用工序復(fù)雜、標(biāo)準(zhǔn)性差、施工周期長的縱橫梁方法，針對平改立的特點(diǎn)和規(guī)范要求，提出采用模塊化鋼桁架架空體系。應(yīng)用ANSYS建立了不同跨度模塊的鋼桁架模型，計算了在列車靜載和不同時速列車動載通過時鋼桁架的撓度和應(yīng)力的變化規(guī)律。在滿足鐵路正常行駛所要求的剛度和強(qiáng)度下，對兩種不同形式鋼桁架體系在不同跨度參數(shù)下進(jìn)行比較分析，給出了可重復(fù)使用、模塊化的鐵路平改立新型架空方案，為平改立鐵路提供了新的架空體系。
[關(guān)鍵詞] 模塊化架空體系；不同跨度；列車荷載；數(shù)值計算分析
中圖分類號：TU323.4 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2011) S2-0249-04Analysis and research on flat change stands railway modular steel truss aerial system
Yin Zhixiang, Zhang Chunxi
(Liaoning Technical University College of Engineering and Architecture, Fuxin 123000, China)Abstract: Flat change stand railway aerial system is very critical in the reconstruction project. The vertical and horizontal beam method with complicated process, poor standards and long construction period is applied generally. Aiming at the features and specifications of flat change stand, the use of modular steel truss aerial system was proposed. ANSYS was applied to establish a different span modules steel truss model, and calculate the variation of deflection and stress when the train passed under static load and dynamic load with different speed. In the condition of meeting the requirements of stiffness and strength for the normal running of the railway, comparison and analysis of two different forms in different span and parameters of steel truss system were given. The reusable and modular railway flat change stand new overhead system was provided.
Keywords: modular overhead system; different span; train loads; numerical analysis
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