STUDY ON SEISMIC DESIGN CRITERIA FOR STEEL FRAMES CONSIDERING DEGRADING LOAD-DEFLECTION CURVES

考虑退化荷载-挠度曲线的钢框架抗震设计准则研究

• 批准号: 06650639
• 负责人: OGAWA Koji
• 金额: $ 1.22万
• 依托单位: KUMAMOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650639/
• 关键词: Steel Frame; Aseismic Design; Seismic Response; Damage Distribution; Damage Concentration; Strength Decay; Deformation Capacity; Energy Absorption Capacity; 重層骨組; 鋼部材; 入力エネルギー; 塑性変形; 強度分布

The results obtained from this project are summarizes as follows :1.Based on numerical response analyzes of shear-type lumped mass models with perfect elasto-plastic load-deflection relationships, a basic law that governs distributions of damages is determined as a function of the strength distribution of structures. For a single-degree-of-freedom system, one quarter of the energy input due to ground motions is assumed to be absorbed first by plastic deformation in one direction, and then the rest of the energy is assumed to be distributed during the following reversals of plastic deflections according to the above-mentioned damage distribution law. Thus, the concentration of plastic deformation on one direction is determined in a quantitative manner.2.The influence of the shape of loas-deflection curves on the seismic response of steel frames is discussed based on the two rules described above. For shear-type models with bi-linear load-deflection relationships, the damage concentratio … More n on weak stories is found to depend on the rigidity ratio between elastic and plastic branch. A formula is derived to evaluate the energy absorption capacity of a single-degree system with tri-linear load-deflection relationship consisting of elastic, hardening, and degrading parts. These results coincide with the results of numerical response analysis.3.Steel frames with rectangular hollow section columns and wide flange beams under strong ground motions are analyzed numerically. The results show the damage disperses throughout the stories because of the yielding of connection panels. In addition, steel frames are designed according to allowable stress design criteria to see ultimate behavior of the frames. The results show frames tend to be of weak beam type structures.4.The computer program for non-linear static and dynamic analysis of plane frames is developed to study the damage distribution in steel frames. The generalized plastic hinge method is used for members to incorporate stain hardening effects. The elasto-plastic behavior including bauschinger effect of joint panels are also taken into account. Less

本项目取得的成果概括如下： 1.基于具有完美弹塑性载荷-挠度关系的剪切型集总质量模型的数值响应分析，确定了控制损伤分布的基本规律作为结构强度分布的函数。对于单自由度系统，假设地面运动输入的能量的四分之一首先被一个方向的塑性变形吸收，然后假设其余能量根据上述损伤分布定律在随后的塑性变形反转过程中分布。从而定量地确定某一方向塑性变形的集中情况。2.基于上述两条规则讨论了荷载-挠度曲线形状对钢框架地震反应的影响。对于具有双线性载荷-挠度关系的剪切型模型，发现薄弱层上的损伤集中度取决于弹性和塑性分支之间的刚度比。推导了由弹性部件、硬化部件和退化部件组成的具有三线性载荷-挠度关系的单度系统的能量吸收能力的计算公式。这些结果与数值响应分析的结果相吻合。3.对强地震动作用下矩形空心截面柱宽翼缘梁钢框架进行了数值分析。结果显示，由于连接面板的屈服，损坏分散在整个楼层。此外，钢框架是根据许用应力设计标准进行设计的，以了解框架的最终性能。结果表明框架结构趋向于弱梁型结构。4.开发了平面框架非线性静动力分析计算机程序,研究了钢框架的损伤分布。广义塑性铰链方法用于构件结合污渍硬化效果。还考虑了弹塑性行为，包括接缝板的包辛格效应。较少的

项目成果

Koji OGAWA and Motohide TADA: "Computer Program for Static and Dynamic Analysis of Steel Frames Considering the Deformation of Joint Panel" Proceedings of the 17th Symposium on Computer Technology of Information, Systems and Applications. 79-84 (1994)

Koji OGAWA和Motohide TADA：“考虑连接板变形的钢框架静态和动态分析的计算机程序”第17届信息、系统和应用计算机技术研讨会论文集。

井上一朗・小川厚治・多田元英・柳原秀和: "角形鋼管柱ラーメン構造部材の塑性変形応答" 鋼構造年次論文集. 第2巻. 9-16 (1994)

Ichiro Inoue、Atsuji Okawa、Motohide Tada、Hidekazu Yanagihara：“方钢管柱刚性框架结构构件的塑性变形响应”钢结构年报卷 2. 9-16 (1994)。

Kazuo INOUE,Koji OGAWA,Motohide TADA and Hidekazu YANAGIHARA: "Earthquake Response of Member Plastic Deformation of Rigid Frame with RHS Column" Journal of Constructional Steel. Vol.2. 9-16 (1994)

Kazuo INOUE、Koji OGAWA、Motohide TADA 和 Hidekazu YANAGIHARA：“RHS 柱刚性框架构件塑性变形的地震响应”建筑钢杂志。

Kenji MACHIDORI,Koji OGAWA and Yoshiaki KUROBANE: "Damage distributions in two directions in structures under strong ground motion" Annual Meeting of Kyushu Branch of Architectural Institute of Japan. C-1. 497-500 (1995)

Kenji MACHIDORI、Koji OGAWA 和 Yoshiaki KUROBANE：“强地震动下结构中两个方向的损伤分布”日本建筑学会九州分会年会。

小川厚治: "柱・梁接合部パネルの変形を考慮した静的・動的応答解析プログラムの開発" 第17回情報・システム・利用・技術シンポジウム論文集. 79-84 (1994)

Atsuji Okawa：“考虑柱梁接合板变形的静态和动态响应分析程序的开发”第 17 届信息、系统、利用和技术研讨会论文集 79-84（1994 年）。