Development of Automated Test Facility of Spatial Structures

空间结构自动化测试装置的研制

基本信息

批准号：
06555167
负责人：
HANGAI Yasuhiko
金额：
$ 7.62万
依托单位：
Institute of Industrial Science, University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555167/
关键词：
Large Span Structure Automated Test Facility Spatial Structure Buckling Static Test Dynamic Test Lattice Shell Hybrid Structure 空間構造自動化試験装置波動伝播動的座屈積層シェル張力安定トラス静的座屈

项目摘要

1.Spatial structure have a three-dimensional from and reveals complicated structural behaviors under the external load so that there are few experimental data about the structural behabiours on buckling, load carrying capacity, etc. Based on this perspective, the objective of the research is to develop an automated static and dynamic loading test facility for spatial structures.The test facility has a multi-axs actuator system and displacement sensors which are arranged in a hexagonal frame in plan and controlled automatically by computer. To examine the validity of the test facility, buckling of shallow arch are tested.2.In the design process, two kinds of spatial structures : lattice shell and hybrid structure of cable and pole are adopted in order to determine the dimension, the capacity of actuator, the magnitude of displacement, etc.for the test facility.3.Lattice shell which is constituted by three-dimensionally arranging members is an excellent structural system viewed from ligh … More tness and strength, and is widely adopted for large span structures. When the lattice shell is designed, the bending stiffness plans an important role in order to reduce member stress and to increase buckling load. Buckling of lattice shell includes member buckling, local buckling and general buckling. From this reason, many papers on theoretical analysis have been presented for spherical lattice shells as well as for cylindrical shells. In this research, the general buckling of shallow cylindrical lattice shell with semi-spherical domical ends is considered. Buckling loads are estimated by using the geometrically nonlinear load-vertical displacement curves and compared with the change of parameters such as the length of cylindrical part, the rise-to-span ratio and the stiffness of semi-spherical ends.4.In the development of a new type test facility, the present research is in the first step. To improve the facility, the following tests are planned.(1) Static test of hybrid structures,(2) Wave propagation test of shallow shells, and(3) Buckling test of shallow lattice shalls. Less

1.空间结构具有三维空间结构，在外荷载作用下表现出复杂的结构行为，导致结构屈曲、承载能力等行为的实验数据很少。基于这个角度，研究的目标是开发一种自动化的空间结构静动载荷试验装置。该试验装置采用多轴执行机构系统和位移传感器，布置在平面六边形框架内，由计算机自动控制，以检验试验装置的有效性。 , 屈曲2、设计过程中采用网壳和索杆混合结构两种空间结构，确定了浅拱的尺寸、作动器容量、位移大小等。 3.由三维排列构件构成的网架结构，从轻质、强度方面考虑，是一种优良的结构体系，被广泛应用于大跨度结构中。刚度计划对于减少构件应力和增加屈曲载荷具有重要作用。网格壳的屈曲包括构件屈曲、局部屈曲和总体屈曲，因此，已经提出了许多关于球形网格壳的理论分析文章。在本研究中，使用几何非线性来估计具有半球形圆顶端部的浅圆柱网格壳的一般屈曲。荷载-竖向位移曲线并与圆柱件长度、升跨比、半球端刚度等参数变化进行比较。 4.在新型试验装置的研制中，目前为了改进该设施，计划进行以下试验：（1）混合结构的静力试验，（2）浅壳的波传播试验，以及（3）浅格子的屈曲试验。