贵阳奥体中心体育场超大悬挑钢结构挑蓬预应力方案比较研究  

Comparison and Research on Pre-stressing Project of the Ultra-large Cantilevered Steel Structure Roof of Palestra,Guiyang Olympic Center

作　　者：刘晨[1] 马克俭[1] 肖建春[1] 

机构地区：[1]贵州大学空间结构研究中心

出　　处：《贵州大学学报（自然科学版）》2009年第4期104-109,共6页Journal of Guizhou University:Natural Sciences

基　　金：贵州大学研究生创新基金(校研理工2009027)

摘　　要：贵阳奥体中心六万人体育场的看台挑篷为超大悬挑,最大悬挑近50米,采用两向斜交管桁架结构。通过沿径向上弦层外侧曲线布索施加预应力来提高结构刚度,曲线索位于悬挑一侧,且预应力索未延伸至结构的有效受力部位。对此预应力方案的效果进行初步分析,提出三种建议与改进措施;采用有限元法,对此预应力方案以及三种建议方案进行分析,对比分析各预应力方案产生的正、负效应,提出多个合理建议。The palestra of Olympic Center in Guiyang can content the stand of the 50,000-seat, the Covering is ultra-large cantilevered and uses two-way diagonal steel-tube trusses, with maximum cantilever of about 50m. Pre-stressing along the radius of the lateral side of upper chord to reduce the maximum structural displacement. Curved pre-stressing cables are located in the side of eantilevering, thus the cables are not stretched to the effec- tive load-bearing region of the structure. This paper first preliminary analyses the pre-stressing efficiency, and proposes three comments and improved measures, then analyses the pre-stressing projeet and three comments pro- ject by using finite element method. The positive and negative effects of each pre-stressing project contrastive , analysesand provides suggestions.

关 键 词：体育场挑篷 超大悬挑 预应力 曲线布索 有限元分析 

分 类 号：TU391[建筑科学—结构工程]