新广州站中央采光带杂交结构受力性能分析  

Mechanical Behavior Analysis on Hybrid Systems for the Central Glass Roof of New Guangzhou Railway Station

作　　者：蔡建国[1] 汪凯[1] 冯健[1] 王靖[1] 张晋[1] 盛平[2] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏省预应力工程技术研究中心,江苏南京210096 [2]北京市建筑设计研究院,北京100045

出　　处：《湖南大学学报（自然科学版）》2012年第2期12-18,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50478075);江苏省六大人才高峰资助项目(07-F-008);江苏省自然科学基金资助项目(BK2006104);东南大学优秀博士学位论文基金资助项目(YBJJ0817)

摘　　要：为了了解新广州火车站中央采光带杂交结构体系的受力性能,讨论了其下部索杆体系的预应力设计水平,分析了结构体系中柔性构件对其静力性能的影响,并对其进行了特征值屈曲分析和非线性屈曲分析,文章最后讨论了上弦钢杆件截面、钢拉杆和下弦拉索截面及其预应力对结构竖向刚度的影响.计算结果表明:杂交体系中下部索杆体系和上部面内钢拉杆可以较大地提高结构的刚度;该杂交结构体系满足整体稳定性的要求,但其端部区域是结构稳定的薄弱环节之一;结构的竖向刚度随着钢杆件截面的增大而增加;上弦钢拉杆的截面及预应力的增加对结构竖向刚度有一定的提高;下弦拉索截面对结构刚度的影响较大,但是其预应力值的影响较小.In order to investigate the mechanical behavior of the hybrid system for the glass roof structure of new Guangzhou Railway Station, the prestress design of the lower cable-strut system was discussed. Then, the effect of the flexible members on the static behavior was studied. The linear eigenvalue buckling analysis and nonlinear buckling analysis on this system were carried out. At last, the influence of the area of upper steel beams, the area and prestress value of the upper track bars and lower cables on the vertical stiffness was investigated. The results have shown that the upper track bar and lower cable increase the structural stiffness. The whole stability of the hybrid system of this project can meet the demand, but the end of the structure is the weakest area. The structural vertical stiffness increases with the increase of the area of the upper beams. Moreover, the increasing area and prestress value of the upper track bar slightly increase the vertical stiffness. The influence of the area of the lower cables on the structural stiffness is significant, but the stiffness is not appreciably affected by the prestress of lower cables.

关 键 词：杂交结构 拉索 静力性能 稳定性 预应力 

分 类 号：TU312.3[建筑科学—结构工程] TU31