张丽华
   （河南省南阳市建设工程质量监督检验站，南阳 473000）

[摘要] 南阳机场航站楼钢屋架工程采用高空散装的方法，屋面采用复合波纹板式结构，钢屋架设计最大跨度36m。屋盖结构施工过程中，设置了四组格构柱作为临时支撑，支撑体系的设计、施工以及卸载方法是南阳机场航站楼钢结构工程的关键。介绍了钢屋架支撑体系的选型设计、卸载施工过程，并针对施工卸载的三种工况的对比计算分析了结构在卸载过程中的受力变化。卸载实施结果证明整套施工技术是成功的，可以为今后类似工程的施工参考借鉴。
[关键词] 钢结构屋架；支撑体系；卸载计算分析
中图分类号：TU398.7    文献标识码：A  文章编号：1002-848X(2012) Sl-0674-03

Unloading analysis for steel roof of terminal building of Nanyang Airport
Zhang Lihua
( Quality Supervision and Test Station of Construction Engineering,  Nanyang, Henan Province, Nanyang 473000, China)

Abstract: High-altitude spread operation method was adopted in the terminal building of Nanyang Airport. The roof is composed with composite corrugated plate structure, while the largest span of the supporting frames of the roof is 36m. During the construction process of the steel roof, four groups oflattice columns acted as the temporary braces are set up. The design, construction of the brace system as wella8 the unloading construction are the key processes of the steel roof. Design of the brace system, unloading process and the analysis of the unloading case were introduced. The practice of the unloading tecluuque is reasonable and practical and this provides a reference for the analogous construction in the future.
Keywords: steel roof; brace system; unloading analysis