湖南大学学报(自然科学版)
湖南大學學報(自然科學版)
호남대학학보(자연과학판)
JOURNAL OF HUNAN UNIVERSITY(NATURAL SCIENCES EDITION)
2015年
5期
8-13
,共6页
张弦巨型网格结构%布索方案%静力性能%结构稳定性
張絃巨型網格結構%佈索方案%靜力性能%結構穩定性
장현거형망격결구%포색방안%정력성능%결구은정성
string reticulated mega-structure%cable-strut arrangements%static properties%structural stability
针对由张弦梁概念和巨型网格结构组合而成的一种新型超大跨空间结构,提出了5种可能的索杆布置方案。研究了矢跨比对不同布索方案结构变形的影响,并对同一矢跨比下各布索方案结构的最大挠度、杆件内力峰值、支座水平反力、挠度和内力分布情况、稳定承载力及失稳模态等方面进行了综合分析,且与同样形式未布索结构作比较。结果表明,预应力体系的引入可以显著改善巨型网格结构的整体变形、杆件内力峰值和整体稳定承载力。在各方案中,拉索交叉的索杆对称布置于立体桁架拱跨中大部分范围(非满布)的布索方式能最有效地改善结构静力与稳定性能,为最佳方案。
針對由張絃樑概唸和巨型網格結構組閤而成的一種新型超大跨空間結構,提齣瞭5種可能的索桿佈置方案。研究瞭矢跨比對不同佈索方案結構變形的影響,併對同一矢跨比下各佈索方案結構的最大撓度、桿件內力峰值、支座水平反力、撓度和內力分佈情況、穩定承載力及失穩模態等方麵進行瞭綜閤分析,且與同樣形式未佈索結構作比較。結果錶明,預應力體繫的引入可以顯著改善巨型網格結構的整體變形、桿件內力峰值和整體穩定承載力。在各方案中,拉索交扠的索桿對稱佈置于立體桁架拱跨中大部分範圍(非滿佈)的佈索方式能最有效地改善結構靜力與穩定性能,為最佳方案。
침대유장현량개념화거형망격결구조합이성적일충신형초대과공간결구,제출료5충가능적색간포치방안。연구료시과비대불동포색방안결구변형적영향,병대동일시과비하각포색방안결구적최대뇨도、간건내력봉치、지좌수평반력、뇨도화내력분포정황、은정승재력급실은모태등방면진행료종합분석,차여동양형식미포색결구작비교。결과표명,예응력체계적인입가이현저개선거형망격결구적정체변형、간건내력봉치화정체은정승재력。재각방안중,랍색교차적색간대칭포치우입체항가공과중대부분범위(비만포)적포색방식능최유효지개선결구정력여은정성능,위최가방안。
For a new type of string reticulated mega-structure based on the concept of beam string structure and cylindrical reticulated mega-structure,five types of cable-strut arrangements were presented, and the influence of rise-span ratio on structural deformation in different cable-strut arrangement styles was also investigated.The maximum deflection,peak value of member internal force,horizontal support reaction,distribution of deflection and member internal force,ultimate load and buckling mode of the structure were analyzed and then compared with those of the corresponding structure without cables.The results indicate that the adoption of the prestressing system can significantly improve the structural de-formation,peak value of member internal force and ultimate load.The static performance and stability of the structure can be improved most effectively when the struts and cables are arranged crosswise and sym-metrically along the central wide range of span of the trussed arches,which is hereby the optimal arrange-ment scheme.