24.露天网架的温度应力作用分析

                     田志昌 , 罗晓波

               （内蒙古科技大学 建筑与土木工程学院，内蒙古 包头 014010）

关键词：空间网架；温度应力；有限元分析

图书分类号：TU356   文献标识码：A

摘要：网架结构是高次超静定结构，在均匀温度场变化下由于杆件不能自由热胀冷缩会产生温度应力。本文研究露天大跨度的网架结构在外界温度交替变化下产生的内力和位移是否起到控制荷载作用，利用SAP2000对网架进行静力和温度荷载作用下的计算，最终通过结果比较得出温度影响在整体网架受力中占的比例，以及结构应力性质的变化。

Effect of the temperature stress on open space  trusses

TIAN Zhi-chang  , LUO Xiao-bo

(Architecture  and Civil Engineering School , Inner Monglia University of Science and Technology , Baotou 014010. China )

Key Words: spatial grid  ,temperature stress , finite element analysis

Abstract:The Space trusses is statically indeterminate structure of the high-order,uniform temperature field changes due to temperature stress rods can not be free to thermal expansion and contraction will produce .The paper was onwhether it is a control load thatthe outdoorlarge-span gridstructure’sinternal force and displacement in the various of the outside temperature. By using SAP2000 to carry out the static of computation and temperature loads, and finally by comparing the results concluded that the temperature influence on the whole rack accounted for the proportion of force, as well as changes in the structure stress properties .