贯隔式钢管混凝土柱H形梁节点抗震性能的试验与有限元研究

为了减少节点域柱体的切割次数且使节点域的塑性铰外移,避免焊缝脆性破坏,提出了一种全螺栓连接贯隔式梁柱节点;同时为了比较该新型节点与隔板贯通式节点破坏机理、抗震性能的异同,设计并对这两类节点进行了低周往复荷载下的试验研究,进一步运用有限元软件分析翼缘螺栓数量对两类节点抗震性能的影响,获得这两类节点的梁端荷载-位移滞回曲线...

Experimental and Finite Element Analysis on the Seismic Behavior of Through-Inner Diaphragm Joints Between H-beam and CFST Columns

In order to reduce the cutting time of the column in the joint area and move the plastic hinge out of joint area,and avoid the brittle failure of the weld seam,a fully bolted through-inner diaphragm beam-to-column joint is proposed.At the same time,in order to compare the failure mechanism and seismic performance between the new joints and the diaphragm through joints,low cyclic reversed loading test of the two joints are designed and carried out,and the influence of flange bolt number on the seismic performance is further analyzed by finite element software.The hysteretic curves,skeleton curves of load-displacement,and stiffness degradation curves at the end of two joints are obtained.The experimental and finite element results show that the hysteretic curves of the two joints show a"pinch"shape due to the relative slip of the diaphragm and flange during loading.The stiffness changes are"keep-drop-slow rise-slow drop".Buckling deformation of flange at outside bolts hole of joint indicates that the flange bolt hole weakens the beam end and the plastic hinge moves to the weakened section;Increasing the number of flange bolts can improve joint stiffness.Both types of joints have good seismic performance.Compared with the diaphragm through joint,through-inner diaphragm joint has the advantages of more simple structure,fewer column segments,and is easy to manufacture and assemble.