Displacementiteration Formfinding Arithmetic in R Coordinates of ISFSL

WANG Cheng; ZHANG Yigang

doi:10.11835/j.issn.1674-4764.2009.02.010

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Displacementiteration Formfinding Arithmetic in R Coordinates of ISFSL

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- Displacementiteration Formfinding Arithmetic in R Coordinates of ISFSL
- Journal of Civil and Environmental Engineering Vol. 31, Issue 2, Pages: 45-50(2009)
- 作者机构：
  
  1. 中国建筑科学研究院,北京,0003
  2. 北京工业大学空间结构研究中心,北京,0024
- 作者简介：
- 基金信息：
- DOI：10.11835/j.issn.1674-4764.2009.02.010
  CLC：
- Published：2009
- 稿件说明：
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WANG Cheng, ZHANG Yigang. Displacementiteration Formfinding Arithmetic in R Coordinates of ISFSL[J]. Journal of Civil and Environmental Engineering, 2009, 31(2): 45-50.
DOI：

WANG Cheng, ZHANG Yigang. Displacementiteration Formfinding Arithmetic in R Coordinates of ISFSL[J]. Journal of Civil and Environmental Engineering, 2009, 31(2): 45-50. DOI： 10.11835/j.issn.1674-4764.2009.02.010.

摘要

针对体内张拉成形空间网格结构工程应用需要，在几何位移迭代法的基础上提出了一种仅对跨度方向，即径向坐标迭代计算的简易结构找形方法—径向迭代找形算法，并通过一个80 m跨的体内张拉成形空间网格结构实例，对其找形过程特点做了细致的对比分析，结果表明该法找形速度快、迭代计算简单，经过6次迭代，坐标误差的最大绝对值仅为ΔR=7.03E-04 m、Δθ=6.7E-0o、ΔZ=0.04 m，通常情况下完全可以满足实际施工要求，而且可以确保结构成形分析和受荷分析的连续性和完整性，非常适合于体内张拉成形空间网

Abstract

In order to put the Internal Stretch Forming Space Lattice Structure (ISFSL) into practice

based on the Geometrical Displacementiterative Method

the Displacementiteration Formfinding Arithmetic in R Coordinates is proposed，in which only the displacementiteration is exerted on span coordinates of ISFSL. A detailed study on the formfinding process is carried out

which is based on an ISFSL with a long span of 80m. The result shows that this arithmetic is very simple with great efficiency and working speed. When the sixth iteration is accomplished

the maximal absolute value of error of coordinates is only as follows: ΔR=7.03E-04m

Δθ=6.7E-0°

ΔZ=.04 E-0m，which is satisfied to the engineeringoriented need. The arithmetic also ensures the continuum and integrality of the structural forming and loading analysis

and is quite fit to the formfinding study of ISFSL. 

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