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对7个方形钢管混凝土梁柱节点进行循环荷载的试验。所有7个构件的连接都采用连接在梁翼缘上的T形加劲肋进行加固。所有构件被分成3个试验系列:第一个是TS系列,构件只被T形加劲肋加固;第二个为TSD系列,除加劲肋之外,还有RBS梁;第三个为TSH系列,在加劲肋上有很多小洞。试验结果主要通过构件的延性来表现。所有构件的塑性转角都超过了0·03 rad,这表明构件的延性能力超出了人们在AISC抗震规定中的特殊弯矩钢连接的要求。锥形的水平加劲连接,翼缘削弱钢梁加工和水平加劲肋在减少水平构件顶端的应力集中方面很有效。然而,在HAZ竖向构件焊接中一些构件的过早失效表明,示设计中T形加劲肋的应变硬化需要被考虑。
A cyclic load test was conducted on 7 square concrete-filled steel tube columns and columns. The connection of all seven components is reinforced with T-shaped stiffeners attached to the flange of the beam. All components are divided into three test series: the first is the TS series, the components are only reinforced with T stiffeners; the second is the TSD series, in addition to stiffeners, there are RBS beams; the third is the TSH series, There are many holes in the stiffeners. The test results are mainly represented by the ductility of the components. The plastic corners of all components exceeded 0,03 rad, indicating that the ductility of the components exceeds the requirements for special bending moment steel connections in the AISC seismic regulations. Conical horizontal stiffening connections, flange weakening steel beam machining and horizontal stiffeners are effective in reducing the stress concentration at the top of the horizontal member. However, premature failure of some components in the welding of HAZ vertical members indicates that the strain hardening of the T-shaped stiffeners in the illustrated design needs to be considered.