湖南大学学报（自然科学版）2018，Vol.45Issue(1)：44-51,8.DOI:10.16339/j.cnki.hdxbzkb.2018.01.006
网架结构竖向抗震性能评估的等效简化模型
Simplified Equivalent Model for Vertical Seismic Performance Evaluation of Space Truss
摘要
Abstract
In order to establish an efficient and accurate procedure for the vertical seismic performance evaluation of space truss structures,a modal pushover load pattern,taking the structural mass distribution into consideration,was adopted so as to modify the establishing process of the equivalent single-degree-of-freedom(ESDF)systems based on the overall structural stiffness parameter.The characteristic of the ver-tical vibration of space truss was investigated,which is influenced by gravity and obviously asymmetric.By assuming the equivalent load-deformation relationship of the ESDF system to be"one-side"elastic,the simplified modal ESDF systems for space truss structures were established.Basic processes for both verti-cal seismic response analysis and vertical seismic performance evaluation of space trusses were given.It is demonstrated by a numerical example that the proposed equivalent-simplified-model-based procedure can yield accurate vertical displacement response(error of central nodal displacement is less than 5%)and can approximately locate the inelastic members of space truss structures.Meanwhile,the time consuming of the proposed simplified procedure is much less than that of the nonlinear response history analysis.Moreo-ver,for practical engineers,the proposed approach is pretty concise and easy to use.关键词
平板网架/抗震性能/竖向地震反应/模态推覆分析/等效单自由度体系Key words
planar latticed structure/seismic performance/vertical seismic response/modal pushover analysis/equivalent single-degree-of-freedom system分类
建筑与水利引用本文复制引用
相阳,毋凯冬,罗永峰,沈祖炎..网架结构竖向抗震性能评估的等效简化模型[J].湖南大学学报（自然科学版）,2018,45(1):44-51,8.基金项目
国家自然科学基金资助项目(51378379),National Natural Science Foundation of China(51378379) （51378379）
