论文部分内容阅读
通过2个T型方钢管节点和4个内隔板加劲节点的低周反复试验,研究内隔板加劲节点的破坏模式、节点的承载力、延性变形能力和节点局部刚度的变化规律。试验中2个未加劲T型节点试件在受拉时主管出现剪切破坏、节点延性差。设置内隔板后,节点试件的屈服荷载和峰值荷载明显增大;在受拉状态下,试件达到峰值荷载后的承载力削弱缓慢、试件的变形能力明显增强;在受压状态下,加劲节点的承载能力明显增大,但节点试件节点区焊缝和主管板件的开裂,导致试件的延性有所降低。
The failure modes, the bearing capacity, the ductile deformation capacity and the local stiffness of the joints of the inner stiffener are studied by the low-frequency repeated tests of two T-shaped square steel tubular joints and four inner stiffened joints. In the experiment, two un-stiffened T-joints specimens were subjected to shearing failure when tensioned, and the joint ductility was poor. After the inner partition was set, the yield stress and peak load of the joint specimens obviously increased. Under the tension state, the bearing capacity of the specimens after the peak load was weakened slowly, and the deformation capacity of the specimens was obviously enhanced. , The bearing capacity of the stiffened joints obviously increases, but the cracking of the welded joints and the competent slab in the joint specimens of the joint specimen leads to the decrease of the ductility of the specimen.