我国高层建筑钢-混凝土混合结构发展与展望

Development and prospect of hybrid high-rise building structures in China

高层建筑钢-混凝土混合结构体系兼有钢结构和混凝土结构的优点。近年来,混合结构在我国高层及超高层建筑中得到了广泛的应用,但国内外对混合结构体系的抗震性能及设计中的一些关键技术问题尚有争议。对高层混合结构常用结构体系及工程应用实例等进行梳理,对混合结构的整体抗震性能、延性、构件设计、节点连接的可靠性、竖向变形差异、施工过程模拟、弹塑性时程分析、阻尼比等关键技术进行了讨论,并提出今后高层混合结构发展需进一步开展的研究工作。

Hybrid high-rise building structure has both the advantages of steel structure and concrete structure.Steel and concrete hybrid structures are widely used in China in recent years.However,different views exist related to the seismic behavior of hybrid structures and key design methodologies.This paper attempts to summarize various hybrid structure systems along with introduction of typical engineering examples.Key technical issues are discussed,including seismic behavior,ductility design,member design,the reliability of connections,difference in vertical deformation,construction analysis,nonlinear time-history analysis and damping ratio.Future research needs are also suggested.