Study on Seismic Strengthening of Steel Structure Framework withRemovable Knee Brace Reinforcement

对内柱节点的组合式试件进行了试验研究，试验结果验证了加强膝支撑可以提高梁柱节点的强度和刚度。虽然膝撑在加固和加固整体框架方面是有效的，但由于膝撑的高强度，现有的梁或柱在强震期间仍被假定为塑性。如果可以在不假定梁或柱屈服的情况下提高抗震性能，则有可能进行更好的改造。提出并讨论了一种内置梳状阻尼器的新型膝关节支撑构件。

An experiment was performed on a subassemblage specimen of an interior column joint with knee brace reinforcement, and the experimental results verified the increase in strength and stiffness of the beam-to-column joint due to the knee brace reinforcement. While knee braces are effective for stiffening and strengthening the overall frameworks, the existing beams or columns are assumed to still plastify during strong earthquakes because of the high strength of the knee braces. A better retrofit is possible if the seismic performance could be upgraded without assuming the yielding of beams or columns. A new type of knee brace member with a built-in comb-shaped damper is proposed and discussed in this study.