摘要
广州西塔地下4层(局部5层),地面以上103层,主塔楼高432m,采用巨型钢管混凝土柱斜交网格外筒+钢筋混凝土内筒的筒中筒结构。斜交网格筒侧向刚度、抗扭刚度大,以斜柱轴力抵抗水平荷载引起的结构楼层水平剪力和倾覆力矩,充分发挥了高强钢管混凝土柱的优势,是超高层建筑的优良结构形式。介绍西塔结构的抗震设计,以概念设计和简单演算论证了结构的抗震安全性。由于结构构件承载力及刚度需求为风荷载组合所控制,相对于地震作用而言,结构的超强系数大,易于达到比现行建筑结构抗震设计要求更高的抗震性能目标。结合西塔的具体情况,讨论了西塔结构抗震等级的设定问题,指出有必要循R-μ-T关系改进关于结构抗震等级的规定。
The Guangzhou West Tower with 4-story height of 432m. The structural system employed in confined concrete （STCC） obliquely crossing lattice （partial 5-story） basement and 103-story above ground has a total the main tower is reinforced concrete central tube in steel tube outer tube. For the outer tube, the lateral and torsional stiffness are large with most of the story horizontal shear forces and overturning moments caused by the horizontal loads resisted by the axial forces of the columns. Such system takes the advantages of high strength STCC columns thus is favorable for ultrahigh-rise buildings. This paper introduces the structural seismic design of the West Tower. It is shown that the safety of the structure under earthquake action is demonstrated by the conceptual design and simple calculations. Since the bearing capacity and stiffness demand of structural members are controlled by the wind load combination, the ultrastrength coefficient is larger compared with earthquake action, thus it is easier to reach the seismic design targets higher than current code requirements. Based on the discussion on the setting of seismic classification for the West Tower, the paper also points out the need to improve the structural seismic measure classification using R-μ-T relationship.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2010年第1期47-55,共9页
Journal of Building Structures
关键词
超高层建筑
概念设计
地震反应
超强系数
抗震等级
ultrahigh-rise building
conceptual design
seismic response
ultra-strength coefficient
seismic measure class
