论文部分内容阅读
设计一种用于复式钢管混凝土结构的新型外钢管不连通环梁节点,介绍该新型节点的构造和制作过程,进行四个梁柱组合体低周反复荷载试验,研究新型节点的抗震性能。试验结果表明:新型节点具有较好延性和变形能力,增加环梁配筋率和柱内钢管尺寸可提高节点的承载力。通过合理的构造措施,外钢管不连通环梁节点中内钢管混凝土、竖向插筋和密排环箍以及周边环梁一起保持了钢管混凝土柱的连续性,节点整体性强,满足结构设计“强柱弱梁”及“强节点弱构件”的设计原则,具有较好的抗震性能。
A new type of external steel pipe ring ring beam joint is designed for the double concrete-filled steel tube (CFST) structure. The construction and fabrication of this new type of joint are introduced. Four low-cycle cyclic loading tests are carried out to study the seismic behavior of the new joints. The experimental results show that the new joints have better ductility and deformation capacity. Increasing the ratio of reinforcement of ring beam and the size of the steel pipe in the column can increase the bearing capacity of the joints. Through rational construction measures, the external steel pipe is not connected to the ring girder joints of the concrete-filled steel tube, the vertical sparging, the close-packed hoops and the surrounding annular girders to maintain the continuity of the concrete-filled steel tubular columns. The joints are strong enough to meet structural design The design principle of “strong column weak beam” and “strong node weak component” has better seismic performance.