水电站进水塔结构抗震性能评估
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摘要
水电站泄洪洞进水塔作为地下隧洞的首部结构,其安全性关系到整个水电站的安全和效益。采用大型三维有限元程序ANSYS对某水电站泄洪洞进水塔结构进行了抗震分析,计算分析了进水塔结构的自振特性,通过反应谱法计算了在顺水流方向、垂直水流方向和竖直方向地震共同作用下进水塔结构的动位移、动应力分布等动力响应情况,并将动力计算结果与静力计算结果进行叠加,评估了进水塔结构抗震性能。结果表明,进水塔结构的变形与强度均能满足要求,但其抗震薄弱部位应力较大,在结构设计时需采取特殊措施以确保塔体结构的安全。
Intake tower of flood discharging tunnel is the head structure of underground tunnel in a hydropower station.Its safety is very important in the security and benefit of hydropower station.The aseismatic analysis of intake tower in hydropower station is performed with 3D FEM program ANSYS software.And the natural vibration characteristics of intake tower structure are analyzed.Under the earthquake interaction in forward flow,vertical flow and vertical direction,dynamic response of displacement and stress distribution are calculated by using response spectrum method.By superimposing the results of dynamic and static calculation,the aseismatic behavior of intake tower is evaluated.The result shows that the deformation and intensity of intake tower structure meet requirements;however,the stress is very high in the weakness aseismatic region,where special measures should be taken to ensure the safety of the tower structure.
Intake tower of flood discharging tunnel is the head structure of underground tunnel in a hydropower station.Its safety is very important in the security and benefit of hydropower station.The aseismatic analysis of intake tower in hydropower station is performed with 3D FEM program ANSYS software.And the natural vibration characteristics of intake tower structure are analyzed.Under the earthquake interaction in forward flow,vertical flow and vertical direction,dynamic response of displacement and stress distribution are calculated by using response spectrum method.By superimposing the results of dynamic and static calculation,the aseismatic behavior of intake tower is evaluated.The result shows that the deformation and intensity of intake tower structure meet requirements;however,the stress is very high in the weakness aseismatic region,where special measures should be taken to ensure the safety of the tower structure.
引文
[1]王银志.高地震区高耸进水塔结构的动力分析[D].大连:大连理工大学,2003.
[2]张继勋,任旭华,王海军,等.泸定水电站泄洪洞进水塔结构抗震安全分析[J].中国农村水利水电,2010(1):124-127.
[3]中国水利水电科学研究院.水工建筑物抗震设计规范(DL5073-2000)[S].北京:中国电力出版社,2001.
[4]张伯艳,杨佳梅.小浪底3号进水塔的静动力分析[J].土木工程学报,1993,26(1):47-52.
[5]赵崇斌,张楚汉,张光斗.用无穷元模拟半无限平面弹性地基[J].清华大学学报(自然科学版),1986,26(3):51-64.
[6]电力工业部西北勘测设计研究院.水工混凝土结构设计规范(DL/T5057-1996)[S].北京:中国电力出版社,1996.
[7]彭翠玲,李声平,吴杰芳,等.水布垭水电站进水塔结构抗震分析与安全评估[J].长江科学院院报,2005,22(2):50-52.
[8]中国水电顾问集团西北勘测设计研究院.水电站进水口设计规范(DL/T5398-2007)[S].北京:中国电力出版社,2008.
[2]张继勋,任旭华,王海军,等.泸定水电站泄洪洞进水塔结构抗震安全分析[J].中国农村水利水电,2010(1):124-127.
[3]中国水利水电科学研究院.水工建筑物抗震设计规范(DL5073-2000)[S].北京:中国电力出版社,2001.
[4]张伯艳,杨佳梅.小浪底3号进水塔的静动力分析[J].土木工程学报,1993,26(1):47-52.
[5]赵崇斌,张楚汉,张光斗.用无穷元模拟半无限平面弹性地基[J].清华大学学报(自然科学版),1986,26(3):51-64.
[6]电力工业部西北勘测设计研究院.水工混凝土结构设计规范(DL/T5057-1996)[S].北京:中国电力出版社,1996.
[7]彭翠玲,李声平,吴杰芳,等.水布垭水电站进水塔结构抗震分析与安全评估[J].长江科学院院报,2005,22(2):50-52.
[8]中国水电顾问集团西北勘测设计研究院.水电站进水口设计规范(DL/T5398-2007)[S].北京:中国电力出版社,2008.
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