高速铁路技术
高速鐵路技術
고속철로기술
HIGH SPEED RAILWAY TECHNOLOGY
2013年
6期
24-28,46
,共6页
高速铁路%高桥墩%寒潮温度场%温度应力%有限元法
高速鐵路%高橋墩%寒潮溫度場%溫度應力%有限元法
고속철로%고교돈%한조온도장%온도응력%유한원법
high-speed railway%high pier%cold wave field%temperature stress%finite element method
目前国内外对高速铁路空心高墩寒潮温度应力研究不多。为了研究寒潮作用下高速铁路高墩结构温度场及温度应力分布，以贵广铁路幸福源双线特大桥12号桥墩为工程背景开展研究工作。该墩为矩形空心墩，墩高80 m，钢筋混凝土结构。浇筑墩身混凝土同时在墩壁内预埋多个温度传感器，选择寒潮来袭时，现场实测了12号墩内寒潮温度场分布，再通过有限元计算对桥墩内寒潮温度场进行了计算验证，采用回归分析得出寒潮温度场在墩壁内按指数曲线分布，归纳出了桥墩内寒潮温度场分布曲线方程。并根据实测得到的桥墩寒潮温度场，采用有限元软件ANSYS分析了桥墩内寒潮温度应力，同时对不同寒潮降温下桥墩内温度应力进行计算研究，归纳总结出寒潮降温与墩壁内温度应力的对应关系。
目前國內外對高速鐵路空心高墩寒潮溫度應力研究不多。為瞭研究寒潮作用下高速鐵路高墩結構溫度場及溫度應力分佈，以貴廣鐵路倖福源雙線特大橋12號橋墩為工程揹景開展研究工作。該墩為矩形空心墩，墩高80 m，鋼觔混凝土結構。澆築墩身混凝土同時在墩壁內預埋多箇溫度傳感器，選擇寒潮來襲時，現場實測瞭12號墩內寒潮溫度場分佈，再通過有限元計算對橋墩內寒潮溫度場進行瞭計算驗證，採用迴歸分析得齣寒潮溫度場在墩壁內按指數麯線分佈，歸納齣瞭橋墩內寒潮溫度場分佈麯線方程。併根據實測得到的橋墩寒潮溫度場，採用有限元軟件ANSYS分析瞭橋墩內寒潮溫度應力，同時對不同寒潮降溫下橋墩內溫度應力進行計算研究，歸納總結齣寒潮降溫與墩壁內溫度應力的對應關繫。
목전국내외대고속철로공심고돈한조온도응력연구불다。위료연구한조작용하고속철로고돈결구온도장급온도응력분포，이귀엄철로행복원쌍선특대교12호교돈위공정배경개전연구공작。해돈위구형공심돈，돈고80 m，강근혼응토결구。요축돈신혼응토동시재돈벽내예매다개온도전감기，선택한조래습시，현장실측료12호돈내한조온도장분포，재통과유한원계산대교돈내한조온도장진행료계산험증，채용회귀분석득출한조온도장재돈벽내안지수곡선분포，귀납출료교돈내한조온도장분포곡선방정。병근거실측득도적교돈한조온도장，채용유한원연건ANSYS분석료교돈내한조온도응력，동시대불동한조강온하교돈내온도응력진행계산연구，귀납총결출한조강온여돈벽내온도응력적대응관계。
In order to study the distribution of temperature field and its stress under the action of cold wave in high-speed railway high pier structure,researches are carried out based on No.12 pier of Xingfuyuan double-line super-large bridge on Guiyang-Guangzhou railway.The pier,hollowly and rectangularly-shaped,80 m high,is a reinforced concrete struc-ture,in which a temperature sensor is embedded as the pier was being cast.When cold wave appears,field test is given to get the temperature distribution in the pier,and then finite element calculation is employed to give it a recheck. Through regression analysis,it is concluded that the cold wave temperature field is distributed in index curve on the pier inside wall and the equation for it is also generalized.According to the measured cold wave temperature field,cold wave stress in the pier is analyzed with finite element software ANSYS,and the temperature stress in the pier under different cold weather is calculated to summarize how the cold cooling corresponds the temperature stress on the pier inside wall.
