张弦梁结构张拉力确定方法研究

The Inquiry of Tension Method for the Beam String Structure

张弦梁结构属于预应力钢结构的一种,在进行拉索预应力导入过程中必须保证施工过程的安全性和完工时的受力状态满足设计要求.因此,必须对张拉索进行张拉过程的索力优化分析和研究,保证对整个施工过程的安全控制.以双向张弦梁为例对比了3种优化方法对张弦梁结构的适用性.经计算分析,得出了张力补偿法为适用于张弦结构张拉力确定的最优方法.结合鹤壁市体育馆预应力空间桁架钢屋盖结构,采用张力补偿法进行了该结构施工阶段分析,得出了高强钢索的内力发展变化规律,验证了张力补偿法在实际大型预应力空间钢结构中的适用性.

The beam string structure belongs to a kind of pre-stressed steel structure,in the pre-stressed import process the cable must be ensured the safety and completion of the construction process of stress state must meet the design requirements. Therefore,the tension cable tensioning process cable force optimization analysis and research is useful to guarantee for the safety of the construction process control. Two-way beam string is used as an example,to compare the three kinds of the applicability of beam string structure optimization method. Through calculation and analysis,it is concluded that the tension compensation method is suitable for a optimal method to determine the tension of string structure. Combination of Hebi city stadium pre-stressed steel roof space truss structure,the tension compensation method is used for the analysis of structure construction stage,it is concluded that the development of internal force variation law of high strength steel wire rope,tension compensation method is verified in actual large the applicability of the pre-stressed space steel structure.