椭圆形大悬挑索承网格屋盖结构的整体同步张拉成型过程研究  

RESEARCH ON INTEGRAL SYNCHRONOUS TENSIONING AND FORMING PROCESSES OF LARGE ELLIPTIC SUSPENDED CABLE-STAYED LATTICE ROOF STRUCTURE

作　　者：张伟[1] 高玉兰[1] 董巍[1] 史艳慧 

机构地区：[1]北京建工集团有限责任公司总承包部,北京100055

出　　处：《建筑技术》2013年第1期45-48,共4页Architecture Technology

摘　　要：徐州市奥体中心体育场屋盖空间曲面钢结构挑篷造型独特,悬挑达40m。整个屋盖结构的成型完全靠张拉预应力拉索来实现,具有拉索张拉力大、数目多、相互影响大、卸载后结构变形大的特点。结合徐州体育场项目建立计算模型,分析了椭圆形大开口索承网格结构的静力性能,模拟了整个屋盖体系的建造过程,得出了预应力拉索张拉过程中索力变化和结构变形的规律。结果表明:从预应力施加对结构系统最终影响的角度看,整体同步张拉径向索的成型方案切实可行,有效地指导了施工中预应力张拉的实时监测和施工调整控制。Xuzhou Olympic Sports Center Stadium adopts a specially-shaped suspended canopy of curved steel structure whose suspended part is as long as 40 meters. The whole roof structure is stabilized by tensioning prestressed cable, so it has such characteristics as high cable tensioning, a large number of cables, mutual influence among cables and obvious structural deformation after unloading. On the basis of Xuzhou Stadium, computation model is established to analyze the static property of large elliptic opening cable-bearing lattice stfiacture, simulate the construction process of whole roof system and master the law of cable-bearing force variation and structural deformation during prestressing cable tensioning. It is successfully proved that considering the final influence of prestressing application on structural system, the integral synchronous tensioning radial cable construction scheme is feasible and it can effectively guide real-time monitoring and construction control on prestressed tensioning.

关 键 词：体育场 网格结构 大悬挑 结构成型 数值模拟 同步张拉 

分 类 号：TU245.2[建筑科学—建筑设计及理论] TU391