The failure mode of model N1 was the local buckling failure of brace at joint, and the failure mode of model N2 was the combined failure of the local buckling of chord side-web with the compressive fracture at the connecting face of chord and brace. 试验表明,试件N1的破坏模式为受压支管在节点处的局部屈曲破坏,试件N2的破坏模式为主管侧壁鼓曲破坏和支主管交接面主管壁压溃破坏的联合破坏模式。