Stress Transfer between Steel Tubular Column and Infill Concrete at A Connection of H-Beams to Concrete Filled Tubular Columns with Diagonal Braces

H 型钢与斜撑填充管柱连接处钢管柱与填充混凝土之间的应力传递

• 批准号: 15560493
• 负责人: KAWANO Akihiko
• 金额: $ 1.98万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560493/
• 关键词: bond; mechanical shear connector; outside diaphragm connection; cut-through diaphragm connection; diagonal brace; confining effect; コンクリート充填鋼管; 筋違付き骨組; 機械的滑り止め; 通しダイヤフラム; 押し抜き試験

In 2003,we performed a push-out test of concrete-filled tubular stub columns to investigate the bond strength between tubular columns and infill concrete and the mechanical shear connector effect due to the cut-through diaphragm for beam-to-column connections. In 2004,frame models composed of a concrete-filled tubular column, H-shape beam and diagonal brace are tested to ensure the realistic bond strength and the effect of mechanical shear connectors in building frames.From the tests, the following conclusive remarks were introduced :(1)The conventional knowledge about the bond strength of concrete-filled tubes were traced by the stab column test. That is the bond strength is affected by tubular section shapes (circular or rectangular hollow section) strongly, but not so much by the concrete strength.(2)The effect of mechanical shear connector caused by the cut-through diaphragm can be predicted by the lower strength either the bearing strength between infill concrete and diaphragm in … More a tube or the shear yield strength of a diaphragm plate even with a large safety margin. In fact, the bearing strength dominated the strength prediction. In such a case, the concrete confining effect should be considered, so that the large safety margin is introduced by the confining effect.(3)In case of frame models with outside diaphragm stiffened connections, the stress transfers from a steel tube to concrete by the bond action. The bond strength observed in the frame models is almost similar to the one obtained from push-out test of concrete-filled tubular stub columns, where only concrete section is subjected to compressive load at the top and only steel tubular potion is supported at the bottom. The bond strength from another test where both of concrete and steel tube are subjected to compressive load at the top will give too much underestimation for the strength obtained from the frame model.(4)In case of frame models with cut-through diaphragm connections, the mechanical shear connector effect can be expected for stress transfer from steel tube to concrete. Even though all of the frame models were designed to have the diaphragm with very large hole for concrete casting, the exposed concrete portion at the column base crushed by the it own axial compressive stress which must be transferred from the steel tube. Therefore, in general, the mechanical shear connecting effect by cut-through diaphragm connections may be large enough for the practical use. Less

2003年，我们进行了钢管混凝土短柱的拔出试验，以研究钢管柱与填充混凝土之间的粘结强度以及横隔板在梁柱连接中的机械剪力连接件效应。2004年对由钢管混凝土柱、H型梁和斜撑组成的框架模型进行了试验，以确保建筑框架中机械剪力连接件的实际粘结强度和效果。也就是说，粘结强度受钢管截面形状(圆形或矩形空心截面)的影响较大，而受混凝土强度的影响不大。(2)在…中，无论是填充混凝土与横隔板之间的承载强度，都可以用较低的强度来预测横隔板对机械剪力连接件的影响。更多的是管或隔膜板的剪切屈服强度，即使有很大的安全裕度。事实上，承载强度是强度预测的主导因素。在这种情况下，应考虑混凝土的约束效应，使其产生较大的安全裕度。(3)在外隔板加筋连接的框架模型中，应力通过粘结作用从钢管传递到混凝土。框架模型中观察到的粘结强度与钢管混凝土短柱顶出试验得到的粘结强度基本相似，钢管混凝土短柱的粘结强度在顶部只受混凝土截面的压缩荷载作用，在底部只受钢管柱支承。在另一种试验中，混凝土和钢管的粘结强度都在顶部承受压缩荷载，这将使框架模型的粘结强度被低估太多。(4)在横隔板连接的框架模型中，钢管到混凝土的应力传递可以预期机械剪切连接件的作用。尽管所有的框架模型都设计为具有很大的混凝土浇筑孔的横隔板，但柱脚裸露的混凝土部分被其自身的轴向压应力压碎，而轴向压应力必须从钢管传递。因此，一般情况下，横隔板连接的机械剪力连接效应对于实际应用而言可能是足够大的。较少

项目成果

CFT部材における鋼管とコンクリートの応力伝達機構について その2-機械的すべり止め効果

关于CFT构件中钢管与混凝土之间的应力传递机制第2部分——机械抗滑移作用

• 发表时间: 2004
• 期刊: 日本建築学会大会学術講演梗概集 構造C
• 作者: 岡本勇紀;河野昭彦;崎野健治;豊里健二
• 通讯作者: 豊里健二

A Study on the Stress Transfer of Steel Tube and Filled Concrete in a CFT Member

钢管混凝土构件中钢管和填充混凝土的应力传递研究

• 发表时间: 2004
• 期刊: Journal of Construction Steel Vol.12
• 作者: Y.Okamoto;A.Kawano;K.Sakino;K.Toyosato
• 通讯作者: K.Toyosato

A Study on the Stress Transfer of Steel Tube and Filled Concrete in a CFT Member, Part-1 Bond Strength Between Tube and Concrete

CFT 构件中钢管和填充混凝土的应力传递研究，第 1 部分：管与混凝土之间的粘结强度

• 发表时间: 2004
• 期刊: Proceedings of AIJ Kyushu Branch Architectural Research Meeting (Structure) Vol.43
• 作者: K.Toyosato;A.Kawano;K.Sakino;Y.Okamoto
• 通讯作者: Y.Okamoto

岡本勇紀, 河野昭彦, 崎野健治, 豊里健二: "CFT部材における鋼管とコンクリートの応力伝達に関する研究 その2機械的すべり止め効果について"日本建築学会九州支部研究報告. 第43号. 645-648 (2004)

Yuki Okamoto、Akihiko Kono、Kenji Sakino、Kenji Toyosato：“CFT构件中钢管与混凝土之间的应力传递研究第2部分：机械防滑效果”日本建筑学会九州分会研究报告第43号。645-648。 (2004))

CFT造筋違付き柱梁接合部における鋼管とコンクリートの応力伝達に関する研究 その2-実験結果

CFT配筋柱梁节点钢管与混凝土应力传递研究第2部分-实验结果

• 发表时间: 2005
• 期刊: 日本建築学会九州支部研究報告集 第44号
• 作者: 岡本勇紀;河野昭彦;崎野健治;豊里健二
• 通讯作者: 豊里健二