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过去10年里,美国关于钢-混凝土组合结构体系抗震性能的研究显著增多。介绍了最近一系列组合横向抗力体系的研究成果,包括由钢梁和钢管混凝土柱或型钢混凝土柱组成的无支撑框架,带钢管混凝土柱的支撑框架及各种组合、混杂墙结构。相比于一般体系,该体系在正常使用或极限状态下的性能及材料与结构的经济性等方面都有许多优点。此外,介绍由带钢筋混凝土填充墙的部分约束钢框架组成的组合体系的深入研究成果。最后,总结了未来对这些组合体系设计的可能规定。
In the past 10 years, there has been a significant increase in the research on the seismic behavior of steel-concrete composite structures in the United States. A series of recent research achievements on the combination of transverse resistance systems are introduced, including unsupported frames composed of steel beams and CFST columns or SRC columns, supporting frames with CFST columns and various combinations and hybrid wall structures. Compared with the general system, the system has many advantages in terms of the performance under normal use or extreme conditions and the material and structural economy. In addition, the in-depth research results of the combined system consisting of partially restrained steel frames with reinforced concrete infill walls are introduced. Finally, the possible rules for the design of these combined systems are summarized.