Stress Transferring Mechanism of Joint Connected S Member with RC Member in Series

1998年，为了研究钢筋混凝土构件与钢构件串联节点的应力传递机理，进行了四个试件的试验研究。所有试件均为截面为2000×300 mm的钢筋混凝土构件和翼缘宽度为100 mm、高度为200 mm的钢构件，节点横向配筋率为0.64%。试验变量为钢筋混凝土构件中钢筋的嵌入长度。预埋钢构件的长度为200、400、600和800 mm。在接头处施加纯弯曲。从试验结果中可以得出以下结论：1）从理论上阐明了钢构件向钢筋混凝土构件的应力传递机理。2)基于这一机理，提出了一种预测混凝土极限强度的方法。3)预测结果与试验结果吻合较好。4)试验结果表明， ...更多信息 为了提高构件的极限抗弯强度，需要3倍于钢构件深度的嵌入长度，1999年，提出了3种节点构造，以改善嵌入长度较短的节点的性能。提出了在预埋钢构件的端部和端部增加横向钢筋、在预埋钢构件的端部焊接钢板以及增加纵向和横向钢筋的节点详图。此外，还提出了在节点钢筋混凝土部分设置斜向钢筋的节点构造方案。为了验证建议的接头细节的有效性，对四个试件进行了试验。构件的尺寸和配筋与1998年进行的试件相似。试验结果表明，在预埋钢构件的端部和端部增设横向钢筋以及在预埋钢构件的端部焊接钢板，对提高节点的极限承载力是有效的。少

In 1998, to clarify stress transferring mechanism of the joint connected reinforced concrete member with the steel member in series, four specimens were tested. All specimens had reinforced concrete member with a section of 2000×300 mm and the steel member with a flange width of 100 mm and a depth of 200 mm. The transverse reinforcement ratio in the joints was 0.64% for all specimens. Experimental variable was the length of the steel member embedded in the reinforced concrete member. The length of the embedded steel member was 200, 400, 600 and 800 mm. Pure bending was applied at the joint. From the test results, the following remarks can be drawn ; 1) The mechanism of stress transfer from the steel member to the reinforced concrete member was clarified theoretically. 2) On the basis of this mechanism, a method capable of predicting the ultimate strength was proposed. 3) The predictions were shown to be in good agreement with the test results. 4) From test result, it was shown that the … More embedded length of three times the depth of the steel member is necessary to develop the ultimate flexural strength of the member.In 1999, three joint details were proposed to improve performance of the joint with short embedded length. Joint details with additional transverse reinforcing bars at the beginning and the end of the embedded steel member, and plate welded at the end of the embedded steel member and additional longitudinal and transverse reinforcing bars were proposed. Furthermore, joint detail with diagonal reinforcing bars at the reinforced concrete part of the joint was also proposed. To verify the effectiveness of proposed joint details, four specimens were tested. The dimensions and reinforcement of the member were similar to the specimens carried out in 1998. From test result, it was shown that additional transverse reinforcing bars at the beginning and the end of the embedded steel member and plate welded at the end of the embedded steel member were effective to increase the ultimate strength of the joint. Less