克孜河渡槽运行期温度应力耦合分析
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摘要
渡槽在运行期时水泥水化热已经基本消失,结构处于较稳定温度状态,由于外界气温变化会引起渡槽内部的温度应力变化,同时在日照、环境温度变化和骤然降温时会引起结构内外温差与温度应力变化。为了有效防止渡槽在运行期混凝土槽身开裂,造成不必要的损失,通过三维有限元软件建立克孜河渡槽三维模型,模拟渡槽运行期温度、应力分布规律。结果表明:运行期温度应力较大,通过在渡槽外壁采取保温措施,有效的改善了槽身的应力状态,可为今后渡槽设计提供设计依据。
During the operation,the cement hydration heat usually have disappeared,thus the structure is in stable state,however the outside temperature changes will cause the aqueduct internal temperature stress changes,also the sunshine,environmental temperature changes and sudden cooling could cause the same problem. In order to prevent the concrete trough from cracking during the operation,three dimensional model of Ke river aqueduct is developed by adopting three-dimensional finite element software,and the temperature and stress distribution during the operation period and operation period of aqueduct are simulated. The results show that the temperature stress in the operation period is larger,and the stress state of the groove body can be effectively improved by adopting the heat preservation measures on the outer wall of the aqueduct. This research could provide design basis for the aqueduct design in the future.
During the operation,the cement hydration heat usually have disappeared,thus the structure is in stable state,however the outside temperature changes will cause the aqueduct internal temperature stress changes,also the sunshine,environmental temperature changes and sudden cooling could cause the same problem. In order to prevent the concrete trough from cracking during the operation,three dimensional model of Ke river aqueduct is developed by adopting three-dimensional finite element software,and the temperature and stress distribution during the operation period and operation period of aqueduct are simulated. The results show that the temperature stress in the operation period is larger,and the stress state of the groove body can be effectively improved by adopting the heat preservation measures on the outer wall of the aqueduct. This research could provide design basis for the aqueduct design in the future.
引文
[1]张继周.全封闭箱型渡槽温度场分析研究[J].甘肃水利水电技术,2016,52(6):29-33.
[2]李苏航,季日臣,柏文文.渡槽在折线温差分布下的横向温度应力计算[J].水电能源科学,2016,34(12):121-124.
[3]陈华婷,刘龙,张文学,等.大跨度叠箱渡槽温度场分布研究[J].工业建筑,2015,45(S1):635-639.
[4]黄涛.渡槽混凝土施工温度引发裂缝的处理[J].山东工业技术,2015(6):126-127.
[5]崔浩朋,刘洋,赵宁.大型矩形混凝土渡槽运行期太阳辐射温度场模拟研究[J].河南科技学院学报(自然科学版),2014,42(1):67-72.
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[10]季日臣,严娟,苏小凤.混凝土箱形渡槽日照高温下结构安全研究[J].南水北调与水利科技,2013,11(6):90-92,109.
[11]严娟,季日臣.箱形渡槽冬季输水工况下温度场与温度应力研究[J].甘肃科技,2013,29(21):123-124.
[12]严娟,季日臣,马虎迎.箱形渡槽越冬期间表面保温能力计算[J].水利水运工程学报,2013(6):88-91.
[13]李晓克,张晓燕,张学朋,等.预应力混凝土渡槽温度影响及设计研究[J].长江科学院院报,2012,29(1):44-48.
[14]吴利华.矩形渡槽运行期人工模拟环境抗裂性能试验研究[J].水利与建筑工程学报,2016,14(4):52-56.
[15]徐威,刘亮,武守锋.联体式渡槽流固耦合动力特性分析[J].水利与建筑工程学报,2012,10(5):18-21.
[2]李苏航,季日臣,柏文文.渡槽在折线温差分布下的横向温度应力计算[J].水电能源科学,2016,34(12):121-124.
[3]陈华婷,刘龙,张文学,等.大跨度叠箱渡槽温度场分布研究[J].工业建筑,2015,45(S1):635-639.
[4]黄涛.渡槽混凝土施工温度引发裂缝的处理[J].山东工业技术,2015(6):126-127.
[5]崔浩朋,刘洋,赵宁.大型矩形混凝土渡槽运行期太阳辐射温度场模拟研究[J].河南科技学院学报(自然科学版),2014,42(1):67-72.
[6]中华人民共和国水利部.水工混凝土结构设计规范:SL 191—2008[S].北京:中国水利水电出版社,2008.
[7]中国建筑科学研究院.预应力混凝土结构抗震设计规程:JGJ 140—2004[S].北京:中国建筑工业出版社,2004.
[8]中交公路规划设计院.公路钢筋混凝土及预应力混凝土桥涵设计规范:D10 JTG D62—2004[S].北京:人民交通出版社,2004.
[9]陈茜,季日臣.日照作用下箱型渡槽温度场与温度应力研究[J].人民长江,2014,45(S2):128-130.
[10]季日臣,严娟,苏小凤.混凝土箱形渡槽日照高温下结构安全研究[J].南水北调与水利科技,2013,11(6):90-92,109.
[11]严娟,季日臣.箱形渡槽冬季输水工况下温度场与温度应力研究[J].甘肃科技,2013,29(21):123-124.
[12]严娟,季日臣,马虎迎.箱形渡槽越冬期间表面保温能力计算[J].水利水运工程学报,2013(6):88-91.
[13]李晓克,张晓燕,张学朋,等.预应力混凝土渡槽温度影响及设计研究[J].长江科学院院报,2012,29(1):44-48.
[14]吴利华.矩形渡槽运行期人工模拟环境抗裂性能试验研究[J].水利与建筑工程学报,2016,14(4):52-56.
[15]徐威,刘亮,武守锋.联体式渡槽流固耦合动力特性分析[J].水利与建筑工程学报,2012,10(5):18-21.