东南大学学报（自然科学版）2011，Vol.41Issue(3)：636-641,6.DOI:10.3969/j.issn.1001-0505.2011.03.039
空间网格结构抗震分析中的阈值法理论
Threshold value method in seismic analysis of spatial latticed structures
摘要
Abstract
In order to establish a criterion for vibration mode selection of spatial latticed structures,current seismic analysis methods are summarized. New concepts of member shear resistance structures (MSRS) and member axial resistance structures (MARS) are defined. It is pointed out that the mass participation factor method is only suitable for structures with lateral stiffness depending on member shear. According to dynamic characteristics of spatial latticed structures and from the viewpoint of vibration mode energy contribution, dynamic work participation factor and static work participation factor are introduced. The corresponding formulas are derived, and a theoretical basis for vibration mode selection is obtained. A new vibration mode selection method, named threshold value method (TVM), is proposed for modes selection of the spatial latticed structures. Two numerical examples are analyzed for verification. The results show that the criterion of mass participation factors is a degradation type of threshold value method. When TVM is adopted, higher accuracy of dynamic responses can be obtained with only a few dominant vibration modes selected. TVM is efficient comparing with the time history analysis method.关键词
空间网格结构/构件承剪型结构/构件轴力型结构/主振型/阈值法Key words
spatial latticed structure/ member shear resistance structures/ member axial resistance structures/ dominant vibration mode/ threshold value method分类
建筑与水利引用本文复制引用
王磊,罗永峰..空间网格结构抗震分析中的阈值法理论[J].东南大学学报（自然科学版）,2011,41(3):636-641,6.基金项目
高等学校博士学科点专项科研基金资助项目(20070247002). （20070247002）
