循环荷载作用下高强螺栓端板节点抗震耗能性能

为研究高强螺栓端板节点的抗震耗能性能,进行了7个连接件的循环加载试验,分析了钢管和螺栓的两种典型破坏模式以及钢管柱壁厚、螺栓直径、螺栓孔横向间距、螺栓个数,以及钢管柱截面尺寸对连接件耗能能力的影响。研究结果表明:高强螺栓端板连接件的破坏模式与钢管管壁厚度和螺栓强度有关;增大钢管柱壁厚、螺栓直径和截面尺寸以及增加螺栓个数和减少截面尺寸均能提高节点的耗能能力,增大钢管柱壁厚对节点的耗能性能的提高最为显著。

Performance Investigation on Seismic Energy Dissipation of End Plate Connection with High-strength Bolts

In order to study the seismic energy dissipation of end plate connection with high-strength bolts, seven connection specimens were tested by cyclic loading test. Two typical failure modes of steel tubes and bolts and the influence of the tube wall thickness, the diameter of bolts, the transverse distance of bolt holes, the number of bolts and the section size of tubes on the energy dissipation capacity of the connection were analyzed. The results show that the failure modes of bolted endplate connections are related to the wall thickness of tubes and the strength of bolts. The energy dissipation capacity increases with the increase of the tube wall thickness, the diameter of bolts, the transverse distance of bolt holes, the number of bolts and reduction inSthe section size of tubes. Increasing the wall thickness of tubes has the most significant improvement on the energy dissipation performance of connections.