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

S杆与RC杆串联连接的应力传递机制

基本信息

批准号：
10650578
负责人：
NISHIMURA Yasushi
金额：
$ 1.98万
依托单位：
Osaka Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650578/
关键词：
Hybrid Structure RCS Joint Embedment Length Improvement of Seismic Performance Prying Mechanism Truss Mechanism Bearing Strength Frictional Strength 終局耐力

项目摘要

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

1998年，为了弄清钢筋混凝土与钢构件串联连接节点的应力传递机理，进行了4个试件的试验研究。所有试件均为钢筋混凝土构件，截面为2000×300 mm，钢构件翼缘宽度为100 mm，深度为200 mm。所有试件的节点横向配筋率为0.64%。试验变量为钢筋混凝土构件内嵌钢构件的长度。埋入钢构件的长度分别为200、400、600和800 mm。在关节处施加纯弯曲。从试验结果可以得出以下结论：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)在此机理的基础上，提出了一种能够预测极限强度的方法。3)预测结果与试验结果吻合较好。4)测试结果表明，…为了提高钢构件的极限抗弯强度，需要增加3倍于钢构件埋深的节点长度。1999年，为了提高短埋长节点的性能，提出了三种节点细部。提出了在预埋钢构件的起点和末端加设横向钢筋、在预埋钢构件的端部焊接钢板以及增设纵横向钢筋的节点构造方案。此外，还提出了在节点的钢筋混凝土部分设置斜筋的节点细节。为了验证所提出的节点细节的有效性，对四个试件进行了测试。该构件的尺寸和加固与1998年进行的试件相似。试验结果表明，在预埋钢构件的始端和端部增加横向钢筋和在预埋钢构件的端部焊接钢板对提高节点的极限强度是有效的。较少