基于性能的新型装配式钢节点混凝土框架结构抗震设计

Research on Performance-based Seismic Design of NewPrefabricated Steel Joint Concrete Frame Structure

目的基于一种新型预制装配式钢筋混凝土梁柱节点试验,将现浇钢筋混凝土框架结构(RCF)与新型装配式钢节点混凝土框架结构(PCF)进行抗震性能对比分析,验证PCF结构的安全可靠,从而进行推广应用。方法运用有限元分析软件Perform-3D进行纤维截面建模,自定义组合截面;对RCF结构以及PCF结构进行基于性能的抗震性能分析。结果该新型装配式钢节点混凝土框架结构的极限承载力和最大位移均大于普通现浇钢筋混凝土框架结构,延性较好,能够承担较大剪力,且整体耗能能力更强,抗倒塌性能良好。结论此类新型装配式钢节点满足规范要求,而且能够提高结构的抗震性能。

Based on a newly prefabricated concrete joint test,the seismic performance of reinforced concrete frame structure(RCF)and newly prefabricated concrete frame structure(PCF)are compared,to validate the safety and reliability of PCF for wider application.The fiber section modeling and custom composite section definition are performed using the Perform-3D finite element analysis software.Performance-based seismic analysis is conducted for both RCF and PCF.PCF exhibits higher ultimate bearing capacity and maximum displacement compared to RCF,which demonstrates excellent ductility,can withstand larger shear force,and possesses stronger energy dissipation capacity,resulting in superior resistance to collapse.The newly prefabricated concrete joint meets the requirements of design codes and significantly enhances the seismic performance of the structure.