Studies of Elasto-Plastic Behavior of Steel Members under Cyclic Axial Force and its Fracture

循环轴向力作用下钢构件弹塑性行为及其断裂研究

• 批准号: 08650684
• 负责人: HIRANO Michikatsu
• 金额: $ 1.34万
• 依托单位: Science University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650684/
• 关键词: Steel Member; Axial Force; Local Buckling; Elasto-Plastic Behavior; Crack; Fracture; 破断

Steel axial members sometimes fracture at its local buckling section in an early phase of a load hysteresis. It the purpose of this study to elucidate a structural characteristic of a steel member under a cyclic axial force and its strain hysteresisi until crack occurs in its local buckling section. Specimen was made of a cold roll- formed steel square tube. Experimental variables were slenderness ratio, width-thickness ratio, existence of heat treatment (normalize), and length of specimen.Main findings were as follows.1. The energy absorption capacity up to fracture was influenced much more by width-thickness ratio than by slenderness ratio of a test specimen.2. Assuming a brace of which slenderness ratio is in its ordinary range, the smaller its slenderness ratio was, the greater its energy absorption capacity up to fracture was.3. There was a slenderness ratio of which energy absorption capacity was the worst in its intermediate range.

在荷载迟滞的早期阶段，钢轴向构件有时会在其局部屈曲截面处断裂。本研究的目的是阐明钢构件在循环轴力作用下的结构特性及其在局部屈曲截面发生裂纹之前的应变迟滞性。试样是用冷轧成形方钢管制成的。实验变量为长细比、宽厚比、是否存在热处理（正态化）和试样长度。主要研究结果如下：试件断裂前的吸能能力受宽厚比的影响要大于受长细比的影响。假设支架的长细比在其正常范围内，其长细比越小，其到断裂前的吸能能力越大。长细比在其中间范围内能量吸收能力最差。

项目成果

Hideo Hodzumi et al.: "Studies of Elasto-Plastic Behavior of Steel Member under Cyclic Axial Force and its Fracture (No.1)" Journal of Structural and Construction Engineering, (Transactions of Architectural Institute of Japan). No.491. 111-119 (1997)

Hideo Hodzumi 等人：“循环轴向力下钢构件弹塑性行为及其断裂的研究（第 1 期）”结构与建筑工程学报，（日本建筑学会汇刊）。

穂積 秀雄: "高軸力を繰返し受ける短かい角形鋼管柱の局部座屈後破断に関する実験研究" 鋼構造年次論文報告集. 第6巻. 399-404 (1998)

Hideo Hozumi：“短矩形钢管柱在反复高轴向力作用下局部屈曲后断裂的实验研究”钢结构年报卷 6. 399-404 (1998)。

"On Post Buckling Fracture of Short Column of Steel Square Tube under Repeated Axial Force" Journal of Constructional Steel. Vol6. 399-404 (1998)

“反复轴向力作用下钢方管短柱后屈曲断裂研究”建筑钢学报。

穂積 秀雄: "繰返し軸力を受ける鋼部材の弾塑性挙動と軸部破断に関する研究その1" 日本建築学会構造系論文集. 491号. 111-119 (1997)

Hideo Hozumi：“重复轴向力作用下钢构件的弹塑性行为和轴断裂研究第 1 部分”日本建筑学会结构工程论文集第 491. 111-119 号（1997 年）。

穂積秀雄: "高軸力を繰返し受ける短い角形鋼管柱の局部座屈後破断に関する実験研究" 鋼構造年次論文報告集. 第6巻. (1998)

Hideo Hozumi：“短矩形钢管柱在反复高轴向力作用下局部屈曲后断裂的实验研究”钢结构年度报告第 6 卷（1998 年）。