盖板式外加强环复式钢管混凝土柱-钢梁节点抗震性能研究

Study on the seismic performance of multibarrel tube-confined concrete column and steel beam joint with external stiffening ring of cover plate

在外加强环式节点的基础上,提出了一种新型盖板式外加强环复式钢管混凝土柱-钢梁节点。利用有限元软件ABAQUS建立了1个普通外加强环节点和12个新型节点并进行了低周反复加载模拟,通过对比与变参研究了轴压比、盖板长厚比和柱环径厚比对新型节点抗震性能的影响。研究表明:新型盖板式外加强环复式钢管混凝土柱钢梁节点比普通外加强环式节点的抗震性能好,并且有效地避免了外加强环和复式钢管混凝土柱接触部分应力集中现象;新型节点在合理的轴压比、盖板长厚比与柱环径厚比范围内,具有较好的抗震性能。新型盖板式外加强环复式钢管混凝土柱-钢梁节点更加适用于工程设计及应用。

On the basis of the external stiffening ring joint,a kind of multibarrel tube-confined concrete column-steel beam joint with external stiffening ring was proposed.Finite element software ABAQUS was used to establish a common external strengthening ring point and 12 new joints for low-cycle repeated loading simulation.The influence of axial compression ratio,length-thickness ratio of cover plate and diameter-thickness ratio of column ring on the seismic performance of the new joints was studied by comparing and varying parameters.The results show that the joints of multibarrel tube-confined concrete column-steel beam with external stiffening ring have better seismic performance than those with common external stiffening ring,and effectively avoid the stress concentration in the contact part between external stiffening ring and multibarrel tube-confined concrete column.The new joint has good seismic performance in the range of reasonable axial compression ratio,length-thickness ratio of cover plate and diameter-thickness ratio of column ring.The multibarrel tube-confined concrete column-steel beam joints with external stiffening ring of cover plate are more suitable for engineering design and application.