锚块预留槽预应力闸墩结构的二维有限元计算
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摘要
锚块预留槽预应力闸墩是一种新型水工结构,由于其可以提高预应力锚索的预压效果,而被广泛运用于国内外的水电工程中。为便于分析预留槽对闸墩应力状态的影响,探讨了采用二维模型进行有限元计算的可行性,并利用单元生死功能计算和分析了不同预留槽位置对闸墩的应力分布状况的影响。计算结果表明,利用二维模型进行预应力闸墩结构的有限元计算能有效提高工程设计的效率,将预留槽设置在锚块中部及靠近颈部的区域更有利于提高预应力锚索的预压效果。
Prestressed pier with anchor block reserved slot is a new type of hydraulic structure, which has been used in domestic and international hydropower projects because of the characteristic of raising the preloading effectiveness of prestressed anchor. In order to analyze the stress state of the pier with reserved slot efficiently, In this paper, we discussed the feasibility of the calculation with 2 D Finite Element Method model, and analyzed the effect of different positions of the reserved slot to the pier stress distribution with the element birth and death function. The results show that calculation with the 2 D Finite Element Method model of prestressed pier can improve engineering design efficiency, and that slot position in the middle or slightly upstream of anchor block will be more conducive to improve the preloading effectiveness of prestressed anchor cable.
Prestressed pier with anchor block reserved slot is a new type of hydraulic structure, which has been used in domestic and international hydropower projects because of the characteristic of raising the preloading effectiveness of prestressed anchor. In order to analyze the stress state of the pier with reserved slot efficiently, In this paper, we discussed the feasibility of the calculation with 2 D Finite Element Method model, and analyzed the effect of different positions of the reserved slot to the pier stress distribution with the element birth and death function. The results show that calculation with the 2 D Finite Element Method model of prestressed pier can improve engineering design efficiency, and that slot position in the middle or slightly upstream of anchor block will be more conducive to improve the preloading effectiveness of prestressed anchor cable.
引文
[1] 刘俊柏,林可翼.预应力闸墩技术及其在我国水电工程中的应用[J].水力发电,1991(5):20-24.
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[3] 唐克东,孙留颖.开槽预应力闸墩应力集中特性研究[J].华北水利水电大学学报(自然科学版),2014,35(4):23-26.
[4] 王志良,申林方,姚激.开槽预应力闸墩应力集中特性研究[J].水利水电技术,2012,43(9):46-49.
[5] 司建辉,简政,蒲锰,等.预应力闸墩锚块空腔位置的优化[J].武汉大学学报(工学版),2010,43(1):43-45.
[6] 刘振,翟泽冰.浯溪口水利枢纽厂房段安装间侧闸墩有限元分析[J].水利规划与设计,2018(12):186-188.
[7] 孙巧荣,强晟,裘华锋,等.渐变流道混凝土结构施工期温度应力特性[J].水资源与水工程学报,2018,29(5):191-196.
[8] 张胡,杜德军,夏云峰,等.沪通长江大桥墩位布设适应性分析[J].水利水运工程学报,2018(5):8-13.
[9] 常富,纪伟.平面钢闸门流固耦合分析与优化设计[J].水利与建筑工程学报,2018,16(2):184-188,199.
[2] 张宗亮,刘兴宁,古瑞昌,等.水电工程预应力闸墩[P].中国专利:200720104303.3,2008-1-16.
[3] 唐克东,孙留颖.开槽预应力闸墩应力集中特性研究[J].华北水利水电大学学报(自然科学版),2014,35(4):23-26.
[4] 王志良,申林方,姚激.开槽预应力闸墩应力集中特性研究[J].水利水电技术,2012,43(9):46-49.
[5] 司建辉,简政,蒲锰,等.预应力闸墩锚块空腔位置的优化[J].武汉大学学报(工学版),2010,43(1):43-45.
[6] 刘振,翟泽冰.浯溪口水利枢纽厂房段安装间侧闸墩有限元分析[J].水利规划与设计,2018(12):186-188.
[7] 孙巧荣,强晟,裘华锋,等.渐变流道混凝土结构施工期温度应力特性[J].水资源与水工程学报,2018,29(5):191-196.
[8] 张胡,杜德军,夏云峰,等.沪通长江大桥墩位布设适应性分析[J].水利水运工程学报,2018(5):8-13.
[9] 常富,纪伟.平面钢闸门流固耦合分析与优化设计[J].水利与建筑工程学报,2018,16(2):184-188,199.