基于网壳子结构的柱面巨型网格结构动力特性的影响参数分析
- 摘 要
-
（辽宁工程技术大学建筑工程学院,阜新 123000）[摘要] 针对巨型网格结构子结构形式的多样性，提出一种基于网壳子结构的柱面巨型网格结构，用正交斜放的单层网壳结构作为柱面巨型网格结构的子结构。研究了其动力特性，包括主体结构单独承载及其与子结构协同承载情况下的自振频率，主要讨论了结构跨度、矢跨比、立体桁架梁高度、支承方式等参数对网壳子结构巨型网格结构的动力特性影响。通过分析可知，网壳子结构的应用提高了网格结构的刚度，结构刚度会随着跨度的增大和约束的减弱而降低，同时得到了适宜该结构形式的矢跨比。为该结构的地震响应分析和参数选择提供了理论依据。[关键词] 巨型网格;网壳子结构;动力特性;自振频率;参数分析中图分类号：TU393.3 文献标识码： A 文章编号：1002-848X(2013)S2-0484-03作者简介：殷志祥，博士，教授， Email：lntuyzx@163.com。Analysis on dynamic characteristics parameters of the Cylindrical giant grid structure with Reticulated shell sub-structureYin Zhixiang, Hao Jianjun(Institute of Civil and Architecture of Liaoning Technical University, Fuxin 123000, China)Abstract: According to the diversity of giant grid structure sub-structure, the cylindrical giant grid structure with reticulated shell sub-structure was proposed, using the orthogonal diagonal single-layer reticulated shell as sub-structure of the cylinder giant grid structure. Its dynamic characteristics were studied under the condition that included the load-bearing contribution of the sub-structure. The influences of the structural span, rise-span ratio, three-dimensional truss beam height, supporting ways to the dynamic performance of the grid structure were mainly discussed. The analysis shows that reticulated shell sub-structure can increase the stiffness of the grid structure, structure stiffness will be decreased with the increasing of span and the reduced of constraints, and got the optimum rise-span ratio of the structure. All these work will provide guide in theory for the seismic response analysis of the structure and parameter selection.Keywords: giant grid; reticulated shell sub-structure; the dynamic characteristics; natural frequency of vibration; parameter analysis
