中文摘要：

针对加强板参数对钢框架梁柱节点抗震机理的影响,设计制作4个翼缘过渡板和4个盖板加强型节点试件,采用1/2缩尺比例的T型试件进行低周反复循环荷载作用下的滞回性能试验研究,并在试验研究基础上采用有限元ANSYS进行数值模拟分析,得到满足节点抗震设计要求的加强板参数取值依据。研究结果表明板式加强型节点的塑性铰在距离加强板端部1/3～1/4梁高位置形成,梁柱连接焊缝均未出现开裂现象,翼缘局部屈曲明显,腹板鼓凸严重,塑性铰现象十分明显;加强板几何参数对节点的承载力和延性均有明显影响,当加强板的长度和厚度增加时,节点承载力有所提高,但其滞回性能和延性性能降低;加强板长度取值过大,节点域在梁塑性铰形成和外移之前发生剪切屈服破坏,限制了加强板末端塑性变形的发展机制。建议加强板参数取值范围：翼缘过渡板或盖板加强板的长度为梁高的0.5～0.8倍;翼缘过渡板厚度为梁翼缘厚度的1.2～1.4倍,盖板加强板厚度为梁翼缘厚度的0.7～1.2倍。

英文摘要：

Some 0.5-scaled T-shape specimens,including 4 cover-plate reinforced connections and 4 flange-plate reinforced connections,were manufactured and tested under cyclic loading to study the effects of reinforced-plate parameters to seismic behavior of connections.Based on the experimental results,numerical analyses were adopted to study reinforced-plate parameters.The results indicated that the plastic hinge was obviously formed at 1/3~1/4 beam depth from the end of the reinforced-plate and there was no fracture in welding,and local buckling that can be found in the flange and the web was seriously convex.The reinforced-plate parameters had important effect on the bearing capacity and ductility of the connections.With the increase of the length and thickness of the reinforced-plate,bearing capacity increased,while hysteresis behavior and ductility factor decreased.If the length of reinforced plate was too long,there was brittle failure in the panel zone before plastic hinge was formed,which blocked the plastic deformation.The recommended scope of the parameters are： 0.5-0.8 times beam depth for length of reinforced plate（flange-plate and cover-plate）,1.2-1.4 times thickness of flange for flange-plate connections,and 0.7-1.2 times thickness of flange for cover-plate reinforced connections.