东方艺术中心钢结构屋架的抗震设计研究  

Study on the seismic design of the steel truss roof of Oriental Art Center

作　　者：汪大绥[1] 姚利民[1] 花更生[1] 张伟育[1] 朱莹[1] 李承铭[2] 李忠湧 宁风 

机构地区：[1]华东建筑设计研究院有限公司,上海200002 [2]上海现代建筑设计集团有限公司,上海200041 [3]东方艺术中心项目建设指挥部,上海200135

出　　处：《建筑结构学报》2006年第3期105-112,共8页Journal of Building Structures

摘　　要：东方艺术中心钢结构屋架具有大跨、长悬臂及异形等特点,提出采用空间钢结构桁架的屋架形式,并且设置200mm的抗震缝将整个屋盖分割成五个区域。通过设置水平支撑及采用多种类型的抗震支座来解决抗震设计中出现的问题。常规设计仅对钢屋架单独模型进行抗震分析。本文通过对三种模型(钢屋架单独模型,考虑混凝土筒体、顶部环板及钢屋架在内五个区域各自的单独整体模型及将五个区域一并考虑的整体模型)的抗震分析发现:(1)在7度抗震设计区,当荷载作用较大、采用固定及滑动支座的大跨或长悬臂桁架结构应进行竖向、水平地震的抗震验算。(2)空间钢结构桁架周期相当密集。在做动力分析时需要考虑更多的振型数以满足精度的要求。(3)由于钢屋架支承于高处,混凝土筒体的存在对屋架内力的影响不能忽略,因此,设计中采用单独整体模型更为合理。(4)单独整体模型的计算结果与整体模型相比偏安全。Due to the characters of long-span, over-cantilever and special shape, the space steel truss is adopted for the roof of Oriental Are Center. The whole system is divided into five parts by seismic joints with the width of 200mm. Horizontal braces and multi-type supports are used to meet the requirements of seismic design. Together with the traditional analysis on the truss itself, the model of five parts separated, and the model with five parts as a whole are studied in this paper. The analysis shows： （ 1 ） In the district of intensity of seven degree, vertical and horizontal seismic analysis is necessary to the longspan, over-cantilever truss with fixed and slide supports under the large loads. （2） The periods of space steel truss are very closed, and more modes should be included in the dynamic analysis. （3） The model with five parts separated should be used in the design because the steel truss is put above and affected by the reinforced concrete structure below. （4） It is safer to use the model with the five parts separated than the connected one.

关 键 词：钢结构 空间桁架 抗震设计 

分 类 号：TU393.3[建筑科学—结构工程] TU318