基于温度应力仿真的碾压混凝土拱坝诱导缝开裂分析研究
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摘要
诱导缝作为碾压混凝土拱坝结构防裂措施,能否在坝体温度下降时率先开裂,以消散温度应力,是控制坝体温度裂缝的关键。应用大型有限元分析软件ANSYS,采用薄层实体接缝单元模拟诱导缝,考虑施工期至运行期全过程瞬态温度荷载,通过三维有限元温度应力仿真分析和诱导缝开裂情况分析对全部采用"诱导缝"分缝形式的某碾压混凝土拱坝进行可行性研究。结果表明:坝体高拉应力区设置的诱导缝,在做好缝端处理,消除诱导缝与地基接触部位应力集中的条件下,能够有效地释放坝体应力,保证坝体在温度荷载下的运行安全。仿真分析结果可为该碾压混凝土拱坝的温度控制、裂缝预测及其预防提供参考依据。
As a structural anti-cracking measure of the rotter compacted concrete( RCC) arch dam,whether the induced joints can crack firstly to reduce the temperature stress when the temperature of the dam drops is the key to control the temperature crack of the dam. The large finite element analysis software ANSYS and the thin-layer solid joint unit were to simulate the induced joint. Considering temperature load from construction period to operation period,the three-dimensional finite element temperature stress simulation analysis and the induced joint cracking analysis are all adopted to study the feasibility of a RCC arch dam in the form of induced joints. The results indicate that induced joints set in high tension stress area could effectively release the temperature stress of the dam and ensure the safety of the dam under the temperature load when the stress concentration of the contact parts between the induced joints and the foundation is eliminated. The simulation analysis results can provide reference for the temperature control,crack prediction and prevention of the RCC arch dam.
As a structural anti-cracking measure of the rotter compacted concrete( RCC) arch dam,whether the induced joints can crack firstly to reduce the temperature stress when the temperature of the dam drops is the key to control the temperature crack of the dam. The large finite element analysis software ANSYS and the thin-layer solid joint unit were to simulate the induced joint. Considering temperature load from construction period to operation period,the three-dimensional finite element temperature stress simulation analysis and the induced joint cracking analysis are all adopted to study the feasibility of a RCC arch dam in the form of induced joints. The results indicate that induced joints set in high tension stress area could effectively release the temperature stress of the dam and ensure the safety of the dam under the temperature load when the stress concentration of the contact parts between the induced joints and the foundation is eliminated. The simulation analysis results can provide reference for the temperature control,crack prediction and prevention of the RCC arch dam.
引文
[1]张国新,刘有志,刘毅,等.特高拱坝施工期裂缝成因分析与温控防裂措施讨论[J].水力发电学报,2010,29(5):45-51.
[2]周秋景,张国新,杨波.高坝混凝土裂缝问题研究综述[J].南水北调与水利科技,2012,10(1):129-132.
[3]张国新,艾永平,刘有志,等.特高拱坝施工期温控防裂问题的探讨[J].水力发电学报,2010,29(5):125-131.
[4]周燕红,徐家奇,何蕴龙.碾压混凝土拱坝诱导缝设置研究[J].水电能源科学,2012,30(11):57-60.
[5]彭成佳,兰春杰,杨家修,等.普定拱坝温度场反馈分析及开裂仿真[J].武汉大学学报(工学版),2006,39(1):21-25.
[6]李春敏.我国碾压混凝土拱坝发展概述[C]//全国碾压混凝土坝筑坝技术交流会,贵阳:2004.
[7]刘海成,吴金国,吴智敏.沙牌碾压混凝土拱坝应力场仿真计算分析[J].沈阳建筑大学学报(自然科学版),2005,21(5):445-450.
[8]曾昭扬,马黔.高碾压混凝土拱坝中的构造缝问题研究[J].水力发电,1998(2):30-35+71.
[9]王学志,宋玉普,张小刚,等.碾压混凝土拱坝双向间隔诱导缝等效强度研究[J].大连理工大学学报,2006,46(2):252-256.
[10]周伟,常晓林,喻建清,等.基于施工期温度仿真的小湾高拱坝结构诱导缝设置效果分析[J].四川大学学报(工程科学版),2008,40(1):51-57.
[11]何婷,汪卫明,张雄,等.复合接触单元及其在带缝高拱坝仿真中的应用[J].水力发电学报,2012,31(5):216-222.
[12]周伟,常晓林,解凌飞,等.模拟高拱坝施工期横缝工作性态的接触-接缝复合单元[J].岩石力学与工程学报,2006,25(S2):3809-3815.
[13]孙伟,何蕴龙,熊堃,等.薄层接缝单元及其在拱坝接缝模拟中的应用[J].四川大学学报(工程科学版),2014,46(S2):26-35.
[14]朱伯芳.大体积混凝土温度应力与温度控制[M].北京:中国水利水电出版社,2012.
[15]刘莹骏,张运良.一种薄层接触单元的开发及FLAC~(3D)实现[J].水利与建筑工程学报,2014,12(4):1-8+49.
[16]田志斌.具有诱导缝的碾压混凝土拱坝温度裂缝发展分析[D].西安:西安理工大学,2013.
[17]马建军,符建云,任涛.基于ANSYS的大体积混凝土浇筑过程仿真分析[J].水电能源科学,2013,31(11):99-101+123.
[18]CHEN Yaolong,WANG Changjiang,LI Shouyi,et al.Simulation analysis of thermal stress of RCC dams using3D finite element relocating mesh method[J].Advances in Engineering Software,2001,32(9):677-682.
[19]张晓飞,王晓平,黄宇,等.寒潮条件下碾压混凝土拱坝温度应力仿真研究[J].水资源与水工程学报,2018,29(1):192-197.
[2]周秋景,张国新,杨波.高坝混凝土裂缝问题研究综述[J].南水北调与水利科技,2012,10(1):129-132.
[3]张国新,艾永平,刘有志,等.特高拱坝施工期温控防裂问题的探讨[J].水力发电学报,2010,29(5):125-131.
[4]周燕红,徐家奇,何蕴龙.碾压混凝土拱坝诱导缝设置研究[J].水电能源科学,2012,30(11):57-60.
[5]彭成佳,兰春杰,杨家修,等.普定拱坝温度场反馈分析及开裂仿真[J].武汉大学学报(工学版),2006,39(1):21-25.
[6]李春敏.我国碾压混凝土拱坝发展概述[C]//全国碾压混凝土坝筑坝技术交流会,贵阳:2004.
[7]刘海成,吴金国,吴智敏.沙牌碾压混凝土拱坝应力场仿真计算分析[J].沈阳建筑大学学报(自然科学版),2005,21(5):445-450.
[8]曾昭扬,马黔.高碾压混凝土拱坝中的构造缝问题研究[J].水力发电,1998(2):30-35+71.
[9]王学志,宋玉普,张小刚,等.碾压混凝土拱坝双向间隔诱导缝等效强度研究[J].大连理工大学学报,2006,46(2):252-256.
[10]周伟,常晓林,喻建清,等.基于施工期温度仿真的小湾高拱坝结构诱导缝设置效果分析[J].四川大学学报(工程科学版),2008,40(1):51-57.
[11]何婷,汪卫明,张雄,等.复合接触单元及其在带缝高拱坝仿真中的应用[J].水力发电学报,2012,31(5):216-222.
[12]周伟,常晓林,解凌飞,等.模拟高拱坝施工期横缝工作性态的接触-接缝复合单元[J].岩石力学与工程学报,2006,25(S2):3809-3815.
[13]孙伟,何蕴龙,熊堃,等.薄层接缝单元及其在拱坝接缝模拟中的应用[J].四川大学学报(工程科学版),2014,46(S2):26-35.
[14]朱伯芳.大体积混凝土温度应力与温度控制[M].北京:中国水利水电出版社,2012.
[15]刘莹骏,张运良.一种薄层接触单元的开发及FLAC~(3D)实现[J].水利与建筑工程学报,2014,12(4):1-8+49.
[16]田志斌.具有诱导缝的碾压混凝土拱坝温度裂缝发展分析[D].西安:西安理工大学,2013.
[17]马建军,符建云,任涛.基于ANSYS的大体积混凝土浇筑过程仿真分析[J].水电能源科学,2013,31(11):99-101+123.
[18]CHEN Yaolong,WANG Changjiang,LI Shouyi,et al.Simulation analysis of thermal stress of RCC dams using3D finite element relocating mesh method[J].Advances in Engineering Software,2001,32(9):677-682.
[19]张晓飞,王晓平,黄宇,等.寒潮条件下碾压混凝土拱坝温度应力仿真研究[J].水资源与水工程学报,2018,29(1):192-197.
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