高速铁路技术
高速鐵路技術
고속철로기술
HIGH SPEED RAILWAY TECHNOLOGY
2014年
6期
75-79,90
,共6页
正交异性钢桥面板%简支钢桁梁桥%计算模型
正交異性鋼橋麵闆%簡支鋼桁樑橋%計算模型
정교이성강교면판%간지강항량교%계산모형
orthotropic steel deck%simply-supported steel truss girder bridge%caculation model
兰渝铁路新井口嘉陵江双线特大桥位于重庆市井口镇，该桥跨越既有渝怀铁路和襄渝铁路，受线路交角及桥下净空限制而采用128 m下承式简支钢桁梁。文章主要介绍了主桁结构形式、正交异性钢桥面系结构特点和施工方案；建立了平面简化计算模型和空间整体计算模型，对比分析了主桁杆件的受力情况、结构变形情况和桥面系的受力特点，探讨了正交异性钢桥面板有效宽度的计算方法。并通过研究，对于整体正交异性钢桥面板的钢桁梁桥，可采用平面模型进行快速计算，其精度可基本满足初步设计要求，进一步考虑正交异性钢桥面板有效宽度后，采用平面计算模型可得到更为准确的结果。
蘭渝鐵路新井口嘉陵江雙線特大橋位于重慶市井口鎮，該橋跨越既有渝懷鐵路和襄渝鐵路，受線路交角及橋下淨空限製而採用128 m下承式簡支鋼桁樑。文章主要介紹瞭主桁結構形式、正交異性鋼橋麵繫結構特點和施工方案；建立瞭平麵簡化計算模型和空間整體計算模型，對比分析瞭主桁桿件的受力情況、結構變形情況和橋麵繫的受力特點，探討瞭正交異性鋼橋麵闆有效寬度的計算方法。併通過研究，對于整體正交異性鋼橋麵闆的鋼桁樑橋，可採用平麵模型進行快速計算，其精度可基本滿足初步設計要求，進一步攷慮正交異性鋼橋麵闆有效寬度後，採用平麵計算模型可得到更為準確的結果。
란투철로신정구가릉강쌍선특대교위우중경시정구진，해교과월기유투부철로화양투철로，수선로교각급교하정공한제이채용128 m하승식간지강항량。문장주요개소료주항결구형식、정교이성강교면계결구특점화시공방안；건립료평면간화계산모형화공간정체계산모형，대비분석료주항간건적수력정황、결구변형정황화교면계적수력특점，탐토료정교이성강교면판유효관도적계산방법。병통과연구，대우정체정교이성강교면판적강항량교，가채용평면모형진행쾌속계산，기정도가기본만족초보설계요구，진일보고필정교이성강교면판유효관도후，채용평면계산모형가득도경위준학적결과。
The new Jialing River Bridge on Lanzhou-Chongqing railway is located in Chongqing Jingkou Town, the bridge spans both the Chongqing-Huaihua railway and Xiangyang-Chongqing railway. Limited by line angle and bridge clear-ance, it uses a 128 m simply-supported steel truss girder bridge. This article describes the main form of truss structure, the structural features of orthotropic steel deck and construction programs;establishes a plane finite element model and a three-dimensional finite element model. It also comparatively analyzes the forces, the structure deformation and mechan-ical characteristics of the orthotropic steel deck, discusses the calculation method of effective width of orthotropic steel deck. For steel truss girder bridge with orthotropic steel deck, the aecuracy of the result calculated with graphic model can basically satisfy the demand in the preliminary design. After we take the valid width of steel deck, accurate results can be obtained by using the plane model.
