体内张拉成形空间网格结构受荷过程参数分析

Parametric Analysis on Load Process of Internal Stretch Forming Space Lattice Structure

针对体内张拉成形空间网格结构实际工程应用的需要,介绍了体内张拉成形空间网格结构的组成.结合其现场施工方法,以一个100 m跨度的体内张拉成形空间网格结构为实例,在成形分析研究的基础上,通过理论模拟和图表分析,研究了上弦梁截面宽度、截面高度和上弦环梁截面类型及尺寸等参数对结构工作阶段性能的影响,并得出各参数对结构影响的特点.结果表明:上弦梁截面宽度、截面高度是影响结构使用的主要参数。

In order to implement the Internal stretch forming space lattice structure （ISFSL） into practice, structure composing of ISFSL is fully presented. Taking practically tensioning methods into consideration, a study of parameter effect on the load process is carried out as far as an ISFSL with a span of 100 metres long is concerned by the theoretical simulating and graph analysis, which is based on the result of the ISFSL forming study with a span of 100 metres long. The parameters include width and height of the upper chord beam cross section, shape and area of the upper chord ring beam. The structural properties of the load process affected by the parameters are also provided, which show that width and height of the upper chord beam cross section is the most important factor which affects the load process.