碳纤维矩形双层索网屋盖体系的静力特性分析

Feature Analysis of Rectangular Two-layer Cable Net Roof System Using Carbon Fiber Cables under Static Forces

建立了碳纤维矩形双层索网屋盖体系在静荷载作用下的非线性控制方程．研究了碳纤维矩形双层索网屋盖体的静力特性。首次求得了碳纤维矩形双层索网在静荷栽作用下，其上下索网的层间接触力近似解。在把碳纤维矩形双层索网与钢丝矩形双层索网比较的基础上，讨论分析了温度、索网垂度等因素对碳纤维矩形双层索网静力特性的影响。随着温度的增加，矩形双层正交索网的拉力将变小，矩形双层正交索网上下索网层间接触力将变大；当温度一定时，随着索网垂度的增加，矩形双层正交索网的上层索网拉力及层间接触力将变小，矩形双层正交索网的下层索网拉力将变大。

By establishing nonlinear control vibration equation, the feature of rectangular two-layer cable net roof system using carbon fiber cables under static forces is studied, and approximate solutions of touching forces between layers under static forces are given firstly in this paper. On the base of comparing rectangular two-layer cable net roof system using carbon fiber cables with using steel cables , this paper discusses and analyzes the impact of temperature, sag of cable net and other factors to the static force feature of rectangular two-layer cable net roof system using carbon fiber cables. The temperature increment will make the tension of rectangular two-layer cable net decrease and make the touching forces between upper and lower cable net of rectangular two-layer cable net increase. When the temperature is certain, with the sag of cable net increment, the tension of upper cable net and touching forces between layers of rectangular two-layer cable net will diminish, and the tension of lower cable net will increase.