铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
7期
95-99
,共5页
城际铁路%空心墩%温差荷载%固端干扰
城際鐵路%空心墩%溫差荷載%固耑榦擾
성제철로%공심돈%온차하재%고단간우
Intercity railway%Hollow pier%Temperature difference load%Fixed end interference
结合时速200 km城际铁路双线圆端形空心墩设计实例，阐述铁路空心墩在非温差工况和温差荷载工况作用下的受力分析思路，总结出空心墩的受力特点和配筋原则。结论为：非温差工况作用下，墩身应力水平较低，仅需配置构造钢筋，按混凝土构件对墩身进行检算；温差工况作用下，部分墩身截面应力已超出混凝土的容许应力，需按计算配置钢筋，按钢筋混凝土构件对墩身进行检算；实体和空心交界处存在明显固端干扰效应，需局部加强钢筋布置。
結閤時速200 km城際鐵路雙線圓耑形空心墩設計實例，闡述鐵路空心墩在非溫差工況和溫差荷載工況作用下的受力分析思路，總結齣空心墩的受力特點和配觔原則。結論為：非溫差工況作用下，墩身應力水平較低，僅需配置構造鋼觔，按混凝土構件對墩身進行檢算；溫差工況作用下，部分墩身截麵應力已超齣混凝土的容許應力，需按計算配置鋼觔，按鋼觔混凝土構件對墩身進行檢算；實體和空心交界處存在明顯固耑榦擾效應，需跼部加彊鋼觔佈置。
결합시속200 km성제철로쌍선원단형공심돈설계실례，천술철로공심돈재비온차공황화온차하재공황작용하적수력분석사로，총결출공심돈적수력특점화배근원칙。결론위：비온차공황작용하，돈신응력수평교저，부수배치구조강근，안혼응토구건대돈신진행검산；온차공황작용하，부분돈신절면응력이초출혼응토적용허응력，수안계산배치강근，안강근혼응토구건대돈신진행검산；실체화공심교계처존재명현고단간우효응，수국부가강강근포치。
With reference to the design of hollow pier for 200 km/h inter-city railway, this paper focuses on the stress analysis of railway bridge hollow pier under the working condition of non-temperature difference and temperature load, and summarizes the stress particularities and reinforcement requirement for the hollow pier. The conclusions are as follows:(1)Under the working condition of non-temperature difference, the stress level of pier shaft is low and only structural steel bar is needed, and the pier shaft is verified as a concrete member. ( 2 ) Under the working condition of temperature difference, part of the pier cross-section stress excesses the allowable stress of concrete, steel bar is arranged according to calculation and the pier shaft is verified as a reinforced concrete member. ( 3 ) Obvious fixed end interference effect exists in solid and hollow juncture, which requires additional local reinforcement.
