Study on Buckling Design Methods of Single Layer Two Way Grid Lattice Shell

单层双向网格壳屈曲设计方法研究

• 批准号: 09650636
• 负责人: FUJIMOTO Masumi
• 金额: $ 1.98万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650636/
• 关键词: Buckling Design Method; Single Layer Lattice Shell; Two Way Grid; PC Bars; Buckling Experiment; Buckling Load; Initial Axial Force; HPシェル; 剛接ジョイント

1. The newly developed standardized truss system joint is treated in order to apply to single layer two-way grid shell. The structural properties were determined by the bending experiment. 1) The relation of moment to rotational angle is almost approximated to tri-linear. 2) The separation and the yield moment of joint increase in cast that the member axial force changes from tension to compression. 3) From the numerical results, the rigidity of joint is almost dependent on the ration of sectional property of joint to that of circular tube.2. The buckling experiments of single layer two way grid dome with PC bar as diagonal member are performed. 1) The initial axial forces of PC bars correspond to the specified value. 2) The increase of buckling load is possible in case that the initial axial force of PC bar is significant value. 3) The discrete treatment method is applicable to calculating the buckling behaviors of these shells.3. The single layer two way grid HP shell with PC bars is subjected under central loading. The deformation behavior of HP latticed shell and the effect of initial axial forces introduced by PC bars are examined.4. The single layer two way grid shells with and without PC bars were analyzed by the discrete treatment method. 1) The initial axial force of PC bars being zero, most of buckling loads of shells with PC bars are from 1.5 to 3 times larger than that of shells without PC bars. 2) When the division number of the shells and the initial axial forces of PC bars are larger, the ration of the buckling load with PC bars to that without PC bars becomes higher. 3) There are three kinds of relations of the buckling load to the initial axial force of PC bars.

1、新开发的标准化桁架系统节点经过处理，适用于单层双向网壳。结构性能通过弯曲实验确定。 1）力矩与转角的关系几乎近似于三线性关系。 2) 铸造时接头的分离和屈服力矩增大，构件轴向力由拉转为压。 3)从数值结果来看，接头刚度几乎取决于接头截面特性与圆管截面特性之比。2．对以PC筋为斜杆的单层双向网格穹顶进行了屈曲试验。 1) PC钢筋的初始轴向力符合规定值。 2）当PC杆的初始轴向力较大时，屈曲载荷可能会增加。 3) 离散处理方法适用于计算这些壳体的屈曲行为。3．带 PC 杆的单层双向网格 HP 外壳承受中心载荷。考察了HP网壳的变形行为和PC杆引入的初始轴向力的影响。 4．采用离散处理方法对有和无PC筋的单层双向网格壳进行了分析。 1）PC筋的初始轴向力为零，有PC筋的壳体大部分屈曲载荷比无PC筋的壳体大1.5～3倍。 2) 当壳体分割数和PC筋初始轴向力越大时，有PC筋的屈曲载荷与无PC筋的屈曲载荷之比越大。 3) PC钢筋的屈曲载荷与初始轴力存在3种关系。

项目成果

Nooshin, H.: "Scallop Domes"Proc. IASS Int. Symposium '97 on Shell & Spatial Structures. 2. 651-660 (1997)

Nooshin, H.：“扇贝圆顶”Proc。

Fujimoto, M.: "Buckling Experiments of Single Layer Two Way Grid Dome Prestressed by PC Bar under Gravity Load"Proc. IASS 40^ Anniversary Congress, Madrid. 1. B2.1-B2.10 (1999)

Fujimoto, M.：“PC 钢筋预应力单层双向网格穹顶在重力荷载下的屈曲实验”Proc。

九嶋壮一郎: "PC鋼棒を組み込んだ単層2方向格子ドームの座屈実験について その1 実験計画と中央集中載荷実験"日本建築学会近畿支部研究報告集構造系. 39. 129-132 (1999)

久岛宗一郎：“采用预应力钢筋的单层双向格子穹顶的屈曲实验，第1部分：实验设计和集中加载实验”，日本建筑学会近畿分院结构系统研究报告39. 129-132（1999）。

岡本圭生: "PC鋼棒を組み込んだ単層2方向格子HPシェルの中央集中載荷実験について"日本建築学会近畿支部研究報告集構造系. 40. (2000)

冈本庆夫：“采用PC钢筋的单层双向格子HP壳的集中加载实验”日本建筑学会近畿分院结构体系研究报告40。（2000）

FUJIMOTO,Masumi: "On Bending Experiment of Rigid Joint for Single Layer Two-way Grid Lattice Shell"Summaries of Technical Papers of Annual Meeting of Kinki Branch of AIJ. 38. 401-404 (1998)

FUJIMOTO、Masumi：《论单层双向网格壳刚性接头的弯曲实验》AIJ近畿分会年会技术论文摘要。