多重弦支网格梁结构在山西体育中心三馆钢屋盖中的应用  

Application of multiple suspended beam structure in the Shanxi Olympic Gymnasium

作　　者：傅学怡[1] 杨想兵[1] 高颖[1] 

机构地区：[1]中建(北京)国际设计顾问有限公司,北京100013

出　　处：《建筑结构学报》2012年第5期1-8,共8页Journal of Building Structures

摘　　要：多重弦支网格梁结构由上部单层网格梁和下部多重弦支结构组成。上部单层网格梁为双向正交正放连续网格梁,下部多重弦支结构由主索、次索、竖向撑杆以及斜拉钢棒构成,上下两部分结构共同工作形成空间结构整体。通过主索、次索两端施加预加应力,使所有索张紧、竖向撑杆受压、上部网格梁整体上拱,改善单层网格梁受力和变形特性,提高其承载力和稳定性;通过山西体育中心三馆屋盖钢结构体系选型分析,将多重弦支网格结构与张弦梁结构的受力性能进行对比分析,研究表明:多重弦支网格梁结构具有更好的空间作用效应,提高其整体结构的稳定性和承载力。The multiple suspended latticed steel beam structure consists of the single-layer grid beam system （upper） and the multiple cables system （lower）. The upper single-layer system is composed of the two-way orthogonal continuous grid beams, while the lower cables system is composed of major cables, secondary cables, vertical struts and inclined steel rods. The two parts work together and form the whole spatial structure. By prestressing the major and secondary cables, the struts are compressed and the upper beam system is cambered into arch shape, resulting in improved mechanism and deformation performance of the upper single-layer beam system. By selection analysis of steel structural system for the Shanxi Olympic Gymnasium, the mechanical behavior and deformation of the multiple suspended beam structure and the single-layer beam system were compared. It shows that the multiple suspended beam structure has a better spatial effect and improved mechanical characteristics. The bearing capacity and the stability of the whole structure can be enhanced.

关 键 词：大跨度钢结构 多重弦支网格梁 预应力 有限元分析 结构选型 

分 类 号：TU393.3[建筑科学—结构工程] TU318