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.

虽然隔板用于加固 H 形梁与混凝土填充圆管 (圆形 CFT) 柱的连接，但在混凝土浇筑过程中，隔板上不可避免地会出现孔洞，并且很可能导致局部变形。因此，在连接的抗震设计中需要对变形进行预测。在第一个研究年，通过测试简单的拉伸试件来研究强度和变形能力，每个试件由短柱组成，梁法兰和隔膜。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、与切通膜片的连接以及无膜片连接。测试表明，连接失效模式是柱管壁中的冲剪裂纹和/或隔板的延性断裂。由于在失效之前发生了较大的塑性伸长，如果通过隔板加强连接，变形能力可能足够。在最后的研究年，对十字形框架样本进行了测试。样本承受恒定的轴向载荷和重复的梁端载荷作为地震载荷。与简单拉伸试件不同，柱管壁冲剪裂缝只是破坏模式。原因可能是重复载荷加速了管壁上的应变集中。然而，变形能力可能是足够的。开发了连接的有限元模型（FEM模型）。通过与试验结果的比较证明了有限元模型的准确性。未来，通过对模型进行参数分析，作者将构建数值数据库并开发连接局部变形的预测方法。

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

河野昭彦, 中田幸造, 井上知哉: "円形CFT柱とH形鋼梁の接合部の耐力と変形に関する実験的研究-外ダイヤフラム型と通しダイヤフラム型について-"九州大学大学院人間環境学研究院紀要,都市・建築学研究. 第1号. 1-8 (2001)

河野明彦、中田幸三、井上智也：“圆形CFT柱与H型钢梁之间的节点强度和变形的实验研究-关于外隔板式和贯通隔板式-”研究生院通报九州大学人类与环境学系，城市与建筑研究，No. 1. 1-8 (2001)。