摘要
节点刚度对结构内力分布和变形形态有重要影响。为了研究圆钢管混凝土柱环梁节点的刚性,借助ANSYS软件建立多组圆钢管混凝土柱环梁节点实体有限元模型进行计算,验证环梁节点的半刚性特性,研究环梁高度、环梁宽度、钢管直径、环梁配筋量和环梁混凝土强度对环梁节点刚度的影响规律,并进一步推导环梁节点简化的初始刚度理论计算公式。研究结果表明:环梁节点具有半刚性特性;增大环梁高度、环梁配筋量和框架梁宽度将提高环梁的刚性,增大环梁宽度和钢管直径将减小环梁刚性。
Joint stiffness has an important impact on stress distribution and deformed shape of structure.In order to research the rigidity of ring-beam joint of concrete-filled circular steel tubular column,many solid finite models were established through ANSYS as well as the calculation was performed,the semi-rigid of ring-beam joint was verified.The influence laws of ring-beam height,ring beam width,steel tube diameter,ring-beam reinforcement and ring-beam concrete strength to joint rigidity were investigated,and then the design formulas of initial stiffness was derived.The results showed that ring-beam joint had semi-rigid feature,the increasing of the ring-beam height and reinforcement would strengthen initial stiffness,and the increasing of the ring-beam width and steel tube diameter would weaken initial stiffness.
出处
《钢结构》
北大核心
2015年第9期27-31,52,共6页
Steel Construction
