储油罐结构的地震局部动力效应
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摘要
储罐在受到地震作用时,经常会产生严重的次灾害,在进行储罐结构地震分析时,必须考虑局部动力效应的影响。使用有限元法对回转壳的刚度阵及质量阵与容器中液体的刚度阵及质量阵的组合进行了研究,重点分析了储油罐的地震局部动力效应,考虑了单元上连续质量惯性力的影响。给出了工程计算实例,计算结果可为一些复杂储罐结构的抗震分析提供较精确的理论依据。
The inferior disaster often occurs in the oil tank under the seismic action. In this paper,the finite element method is used to derive the mass matrix and stiffness matrix of the revolutionary shell. Then these matrices are combined to the mass matrix and stiffness matrix of the liquid in the tank. The seismic local dynamic effect of the storage tank has been emphatically analyzed on the base,and the continuous mass in-ertial force in the element is considered. It could be found from the engineering case calculation that the local dynamic effect must be considered when the anti-seismic analysis of the oil tank is carried out. This makes the anti-seismic analysis of the complicated structure more accurate. Some useful results are obtained. These are beneficial to engineering design.
The inferior disaster often occurs in the oil tank under the seismic action. In this paper,the finite element method is used to derive the mass matrix and stiffness matrix of the revolutionary shell. Then these matrices are combined to the mass matrix and stiffness matrix of the liquid in the tank. The seismic local dynamic effect of the storage tank has been emphatically analyzed on the base,and the continuous mass in-ertial force in the element is considered. It could be found from the engineering case calculation that the local dynamic effect must be considered when the anti-seismic analysis of the oil tank is carried out. This makes the anti-seismic analysis of the complicated structure more accurate. Some useful results are obtained. These are beneficial to engineering design.
引文
1, Niva, A. and Clough, R. W.: Buckling of Cylindrical Liquid Storage Tanks under Earthquake Loading, Earthq. Eng. Struct. Dyn. 1982 (10) .
2,Zienkiewicz,O. C. and Cheung,Y.K:结构和连续力学中的有限单元体法,国防工业出版社(北京),1975。
3, Thomas, J. and Abbas, B. A. H.: Dynamic Stability of off-shore Structures, Journal of Mechanical Engineering Science, 1980,22(1) .
4,Anagnostopoulos,S.A.:在地震扰动下近海平台局部杆件的反应,国外地震工程近海平台专集(上),中国科学研究院工程力学研究所,1983。
5,孙焕纯 曲乃泗等:高等计算结构动力学,大连理工大学出版社(大连),1992。
6,曲淑英 王心健等:任意荷载下梁单元局部效应分析,振动与冲击,2001,20(3) 。
2,Zienkiewicz,O. C. and Cheung,Y.K:结构和连续力学中的有限单元体法,国防工业出版社(北京),1975。
3, Thomas, J. and Abbas, B. A. H.: Dynamic Stability of off-shore Structures, Journal of Mechanical Engineering Science, 1980,22(1) .
4,Anagnostopoulos,S.A.:在地震扰动下近海平台局部杆件的反应,国外地震工程近海平台专集(上),中国科学研究院工程力学研究所,1983。
5,孙焕纯 曲乃泗等:高等计算结构动力学,大连理工大学出版社(大连),1992。
6,曲淑英 王心健等:任意荷载下梁单元局部效应分析,振动与冲击,2001,20(3) 。
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