METHOD FOR CALCULATION OF THE TENSION CABLE LIMITED LOADING CAPACITY AT ELEVATED TEMPERATURE
It is well known that thermal elongation causes prestress loss in tension cable in the fire history. In the meantime Non-linear temperature dependent material properties, such as stress-strain relationship, specific heat, thermal conductivity and elongation are decreased with elevated temperature. Then thermo-mechanical must be determined for tension cable in large space fires. The equilibrium equation for steel cables in large space fire temperature is established and nonlinear thermal strain coupling of geometry deformation was taken into account. Imported the temperature distribution, material properties and loading conditions, the mathematical equation for calculation of limited loading capacity of cables can be derived from the equilibrium equation with integral along cables. This mathematical equation shows explicit mechanical factors and fits to numerical simulation well. At given temperature, the horizontal tension which indicates the loading capacity of tension cable can be gotten by inputting the boundary conditions into this mathematical equation. This method for calculation of tension cable limited loading capacity in elevated temperature can be employed by analysis of cable nets and beam string structures fire-resistance.
Tension cable fire-resistance limited loading capacity prestress
Y. Du Y. Z. Lu
School of Civil Engineering, Nanjing University of Technology, Nanjing, 210009, China
国际会议
Seventh International Conference on Advances in Steel Structures(第七届国际钢结构进展会议 ICSS2012)
南京
英文
790-796
2012-04-14（万方平台首次上网日期，不代表论文的发表时间）