半刚接钢框架内填RC墙结构抗震设计方法(Ⅰ)——理论

The seismic design method of partially-restrained steel frame with solid RC infill walls——Part Ⅰ: Theory

半刚接钢框架内填RC墙结构(简称PSRCW)是一种抗震性能优良的新型组合结构体系,为推广其工程应用,文中提出了PSRCW结构的两阶段抗震设计方法:1多遇地震水准下结构的弹性设计法——用于初步确定PSRCW结构主要受力构件的截面;2罕遇地震水准下结构的能力设计法——用于确保PSRCW结构进入弹塑性阶段出现理想的破坏模式。根据已有的试验结果,提出PSRCW结构的理想塑性屈服机构,建立罕遇地震水准下RC内填墙周边钢构件能力设计的简化计算公式,给出设计步骤。文中设计方法的合理性验证见另文。

The partially-restrained steel frame with solid RC infill walls （PSRCW） is an innovative composite structural system. To promote the engineering application of PSRCW, a two-stage seismic design approach was proposed. At the first stage, the elastic design method was adopted to determine the cross sections of primary components under design earthquake level. At the second stage, the capacity-based seismic design method was used to ensure that PSRCW produced a desired plastic yielding mechanism under severe earthquake level. Based on the experimental results of PSRCW, a desired plastic yielding mechanism was proposed, and the calculation formula of surrounding steel components and design flow were suggested to satisfy the capacity design rule under severe earthquake level. The reliability of this method was proved in the companion paper.