Low Cycle Fatigue Research on Welded Joint of Beam-Column Conection

梁柱连接焊接接头低周疲劳研究

• 批准号: 10650573
• 负责人: MIURA Hiroaki
• 金额: $ 1.98万
• 依托单位: Tokyo Denki University
• 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-10650573/
• 关键词: beam-column Connection; welding; low cycle fatigue; crack propagation; fracture mechanics

The low-cycle fatigue strength of welded joints steel beam-column connection which were subjected repeated stresses by wind and/or earthquake loads were investigated experimentaly. Test specimens was T type connection consiste of the perimeter column and beam. The column was a rectangular hollow section ( □ -200x200x9, STKR400), and the beam was H-section (H-200x100x5.5x8, SS400). Test parameters were 1) scallop and/or non-scallop, 2) backing bar and/or non-backing bar. Tested specimens were total 24 pieces by combination of these parameters.The results of low-cycle fatigue test of welded joints of beam to column were as follows,1. The facture of non-scallop specimens were the full wide failure of the beam flange by the crack propagation from (1) the groove weld between the diaphragm and the beam flange in case of non-backing bar, (2) the fillete welds between backing bar and the beam flange when the displacement-amplitude was under 1.25 △ィイD2pィエD2, (3) the groove weld between the diaphragm and the beam flange when over 1.0 △ィイD2pィエD2 in case of with backing bar.2. The fracture of with scallop specimens were also the full wide failure of the beam flange by the crack propagation from (4) the groove weld between the diaphragm and the beam flange when the displacement-amplitude was under 0.87△ィイD2pィエD2, (5) the bottom of the scallop when over 1.0 △ィイD2pィエD2 in case of non-backing bar, and (6) the fillet welds between the backing bar and the beam flange in case of with backing bar.3. The fatigue life of with scallop specimens deteriorated to about 20% to 50% of the fatigue life of the non-scallop specimens in case of non-backing bar, and deteriorated to about 10% to 30% of these in case of with backing bar.

试验研究了在风荷载和地震荷载作用下焊接连接钢-柱连接的低周疲劳强度。试件为T型连接，由周长柱和梁组成。柱为矩形空心截面（□-200x200x9, STKR400），梁为h截面（H-200x100x5.5x8, SS400）。试验参数为1)扇贝和/或非扇贝，2)支撑条和/或非支撑条。综合这些参数，试件共24块。梁柱焊接接头低周疲劳试验结果如下：1。non-scallop标本的制作完整的宽梁法兰的裂纹扩展的失败(1)隔膜和梁之间的坡口焊法兰non-backing酒吧,(2)fillete焊缝撑杆和梁之间的法兰displacement-amplitude时低于1.25△ィイD2pィエD2,(3)隔膜和梁之间的坡口焊法兰时超过1.0△ィイD2pィエD2 bar.2的支持下。与扇贝的骨折标本也完整的宽梁法兰的裂纹扩展的失败(4)隔膜和梁之间的坡口焊法兰displacement-amplitude时低于0.87△ィイD2pィエD2,(5)的底部扇贝时超过1.0△ィイD2pィエD2 non-backing酒吧,和(6)撑杆和梁之间的角焊法兰bar.3的支持下。有扇贝试件的疲劳寿命在无支承杆的情况下下降到无扇贝试件的20% ~ 50%左右，有支承杆的情况下下降到无扇贝试件疲劳寿命的10% ~ 30%左右。

项目成果

見村博明: "鋼構造柱-はり溶接接合部に低サイクル疲労に関する研究"日本建築学会構造系論文報告集. 521. 111-118 (1999)

三村宏明：《钢结构柱-梁焊接接头低周疲劳的研究》日本建筑学会结构工学论文报告521. 111-118（1999）

Hiroaki MIMURA: "Low Cycle Fatigue of Beam-To-Column Welded Connection, (Fatigue strength of full penetrated welding joint used model specimens)"J.struct.Constr.Eng., AIJ. 521. 111-118 (1999)

Hiroaki MIMURA：“梁柱焊接连接的低周疲劳，（全熔透焊接接头的疲劳强度使用模型样本）”J.struct.Constr.Eng.，AIJ。

阿久津敬人: "鋼構造柱-はり溶接接合部に低サイクル疲労に関する研究,その1"日本建築学会大会学術講演梗概集. 437-438 (1998)

Takahito Akutsu：“钢结构柱梁焊接接头低周疲劳研究，第 1 部分”日本建筑学会会议记录 437-438（1998）。

見村博明: "鋼構造柱ーはり溶接接合部の低サイクル疲労に関する研究,"日本建築学会構造系論文報告集. 521. 111-118 (1999)

Hiroaki Mimura：“钢结构柱梁焊接接头低周疲劳的研究”，日本建筑学会结构工程论文集 521. 111-118 (1999)。

Yoshito AKUTHU: "Low Cycle Fatigue of Beam-Column Welded Connection (Part1)"Summaries of Technical papers of Annual Meeting of AIJ. 437-438 (1998)

Yoshito AKUTHU：“梁柱焊接连接的低周疲劳（第1部分）”AIJ年会技术论文摘要。