【摘要】 斜交网格筒新型结构体系具有较大的抗侧刚度,为建造高层、超高层结构提供了有利条件,目前已在国内外有多例成功实践,但相关抗震性能研究还很少。采用Perform-3D程序对典型钢管混凝土斜交网格筒-钢筋混凝土内筒结构进行了静力弹塑性分析。总结了体系塑性发展过程及构件屈服顺序,给出了斜交网格筒屈服路径,并从斜交网格筒作用力的变化阐述了内外筒间内力重分配的原因,明确了内外筒内力分配特点。基于内外筒抗侧刚度的发展过程,探讨了结构抗侧刚度退化的主要原因。更多还原

【Abstract】 Diagrid tube structures have advantages for constructing high-rise buildings due to their greater rigidity,however their aseismic behavior study are limited.Models of concrete filled steel tube CFST diagrid tube-concrete core tube structure were analyzed with modal pushover method using Perform-3D program.The structure plastic development process and the component yield order were given.The force distributions of diagrid and core tubes were studied and the resons of force redistributions between two tubes were explained by analyzing the changes of diagrid tube force.The reason for structure lateral stiffness degradation was discussed based on the lateral stiffness development process of diagrid tube and core one.The influences of the related factors lateral of stiffness on the plastic development process,force distribution between two tubes and stiffness changes were discussed at last.更多还原