A Study on Connection Strength and Deformation Capacity of H-Shaped Steel Beams to Concrete Filled Circular Tubular Columns

H型钢梁与圆管混凝土柱连接强度及变形能力研究

• 批准号: 12650577
• 负责人: KAWANO Akihiko
• 金额: $ 2.3万
• 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650577/
• 关键词: Concrete filled circular tube; Beam to Column connection; Connection strength; Beam flange; Repeated loads; Diaphragm plate; Finite element model; 繰返し荷重; コンクリート充填円形鋼管柱; 鋼管の局部変形; 柱・梁フランジモデル試験体

Although diaphragms are used for stiffening the connections of H-shaped beam to concrete filled circular tubular (circular CFT) columns, a hole is inevitable in the diaphragms for concrete casting, and is likely to result the local deformations. Therefore, a prediction of the deformations will be required in the seismic-resistant design for the connections.At the first research year, the strength and the deformation capacity were investigated by testing simple tension specimens, each of which was composed of a stub column, beam flanges, and a diaphragm. One of the test parameters was the connection type, i.e. a connection with an external diaphragm of polygon-shape or circular-shape, a connection with a cut-through diaphragm, and a non-diaphragm connection. The test revealed that connection failure modes were the punching shear cracks in a column tubular wall and/or the ductile fracture of a diaphragm plate. Since the large plastic elongation occurs prior to the failure, the deformation capacity may be enough, if the connection is stiffened by diaphragm plates.At the final research year, cruci-form frame specimens were tested. The specimen was subjected to a constant axial load and repeated beam-end loads as seismic loads. Differing from the simple tension specimen, the punching shear crack of column tubular wall was only the mode of failure. The reason may be the load repeating, which accelerates the strain concentration on tubular walls. However, the deformation capacity may be enough.A finite element model of connection (FEM model) is developed. The accuracy of the FEM model was demonstrated by a comparison with the test results. In the future, by performing a parametric analysis of the model, the authors will construct a numerical database and develop a prediction method of the local deformations of connections.

尽管隔膜用于加强H形梁与混凝土填充圆形管（圆形CFT）柱的连接，但在隔膜中不可避免地可以进行混凝土铸造的孔，并可能导致局部变形。因此，通过测试简单的张力标本来研究强度和变形能力，在第一个研究年度，将需要对连接的地震抗性设计进行变形的预测。测试参数之一是连接类型，即与多边形或圆形外部膜片的连接，带有切割隔膜的连接以及非肌电连接的连接。该测试表明，连接故障模式是圆柱壁上的打孔剪切裂纹和/或隔膜板的延性断裂。由于大型塑性伸长发生在故障之前发生，因此变形能力可能足够，如果连接被隔膜板僵硬。在最后的研究年度，对Cruci-Form框架样本进行了测试。将试样承受恒定的轴向载荷，并在地震载荷时重复进行梁端载荷。与简单的张力标本不同，柱管壁的打孔剪切裂纹只是故障方式。原因可能是负载重复，这加速了管状壁上的应变浓度。但是，变形容量可能就足够了。开发了有限的连接元素模型（FEM模型）。通过与测试结果进行比较，证明了FEM模型的准确性。将来，通过对模型进行参数分析，作者将构建一个数值数据库，并为连接的局部变形而开发预测方法。

项目成果

Kozo NAKADA, Akihiko KAWANO and Chiaki MATSUI: "A Study on the Connection Strength and Deformation Capacity of H-Shaped Steel Beams to Concrete Filled Circular Tubular Columns, Part 1 Experimental Program of Simple Tension Specimens Composed of Stub Colum

Kozo NAKADA、Akihiko KAWANO 和 Chiaki MATSUI：“H 型钢梁与混凝土圆管柱的连接强度和变形能力研究，第 1 部分由短柱构成的简单受拉试件的实验方案”

Kozo NAKADA, Akihiko KAWANO and Tomoya INOUE: "A Study on the Connection Strength and Deformation Capacity of H-Shaped Steel Beams to Concrete Filled Circular Tubular Columns, Part 3 Test of Subassembly Specimens under Cyclic Loading (in Japanese)"Proceed

Kozo NAKADA、Akihiko KAWANO 和 Tomoya INOUE：“H 型钢梁与混凝土圆管柱的连接强度和变形能力研究，第 3 部分循环荷载下分组件试件的试验（日语）”继续进行

井上知哉, 河野昭彦, 中田幸造: "コンクリート充填円形鋼管柱とH形鋼梁の接合部耐力と変形性状に関する研究,その2 柱・梁フランジモデル試験体の実験結果"日本建築学会九州支部研究報告. 第41号. 445-448 (2002)

井上智也、河野明彦、中田幸三：《圆钢管混凝土柱与H型钢梁节点强度及变形性能研究，第2部分：柱、梁翼缘模型试验试件的实验结果》建筑研究所日本九州分部研究报告书第 41. 445-448 号 (2002)

Tomoya INOUE, Akihiko KAWANO and Kozo NAKADA: "A Study on the Strength and Deformation of Connections of H-Shaped Beams to Concrete Filled Circular Tubular Columns, Part 1 Experimental Program of Column and Beam Flange Connection Model (in Japanese)"Summa

Tomoya INOUE、Akihiko KAWANO 和 Kozo NAKADA：“H 形梁与混凝土填充圆管柱连接强度和变形的研究，第 1 部分柱与梁翼缘连接模型的实验程序（日语）”摘要

Kozo Nakata, Akihiko Kawano: "STRENGTH AND DEFORMABILITY IN DIAPHRAGM-STIFFENED CONNECTIONS OF BEAM FLANGES TO CIRCULAR CFT COLUMNS"The Proceedings of The 12th International Offshore and Polar Engineering Conference, Kitakyushu, Japan, 26-31/May, 2002. 1-

Kozo Nakata、Akihiko Kawano：“梁法兰与圆形 CFT 柱的隔膜加固连接的强度和变形性”第 12 届国际近海和极地工程会议记录，日本北九州，2002 年 5 月 26-31 日。 1-