拉西瓦进水口高耸塔群动力分析
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摘要
拉西瓦水电站进水塔由6个单塔组成,"一"字型错台布置,塔群的最大高度为115 m;基于通用有限元程序ANSYS,采用时程分析法对塔群进行了动力分析;计算结果反映进水塔对输入地震的放大作用明显,塔顶加速度达到塔底的1.8倍。在遇高烈度地震情况下,群塔之间有发生互相碰撞的可能性。依据动力分析结果对防止塔群碰撞提出了有益的建议和措施。
The Laxiwa intake tower group is consisted of 6 towers arranged in a line and the maximum height of the tower group is 113m.Based on the general finite element program ANSYS,dynamic analysis of the tower group is made by the time-history method.The calculated results show that the intake tower obviously magnifies input earthquake and the acceleration at tower top is 1.8 times of that at the bottom.In the case of high intensity earthquake,the towers may collide with each other.The paper puts forward recommendations and measures to prevent the collision of group towers based on the results of dynamic analysis.
The Laxiwa intake tower group is consisted of 6 towers arranged in a line and the maximum height of the tower group is 113m.Based on the general finite element program ANSYS,dynamic analysis of the tower group is made by the time-history method.The calculated results show that the intake tower obviously magnifies input earthquake and the acceleration at tower top is 1.8 times of that at the bottom.In the case of high intensity earthquake,the towers may collide with each other.The paper puts forward recommendations and measures to prevent the collision of group towers based on the results of dynamic analysis.
引文
[1]沈聚敏,周锡元.抗震工程学[M].北京:建筑工业出版社,2001.
[2]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[3]朱伯芳.有限单元法原理与应用[M].北京:中国水利水电出版社,2000.
[4]DL5073-2000,水工建筑物抗震设计规范[S].
[5]张俊发,石广斌.黄河拉西瓦水电站进水塔静动力三维有限元分析研究报告[R].西安:西安理工大学,2006.
[2]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[3]朱伯芳.有限单元法原理与应用[M].北京:中国水利水电出版社,2000.
[4]DL5073-2000,水工建筑物抗震设计规范[S].
[5]张俊发,石广斌.黄河拉西瓦水电站进水塔静动力三维有限元分析研究报告[R].西安:西安理工大学,2006.
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