Performance-based Design of Steel Moment Frames Sustaining Beam-Hinging Mechanism

钢弯矩框架支撑梁铰机构的基于性能的设计

• 批准号: 13650632
• 负责人: OGAWA Koji
• 金额: $ 2.43万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650632/
• 关键词: steel moment frame; ductility demand; beam; maximum story drift; maximum plastic rotation; cumulative plastic rotation; hysteretic damper; 鋼構造骨組; 耐震設計; 崩壊機構; 必要塑性変形性能; 最大塑性変形; 累積塑性変形; 地震入力エネルギー; 等価; 自由度系

The results from this project are summarized as follows:1. Energy input can be predicted by using a pseudo-velocity response spectrum. However, this method of prediction cannot be applied to extremely long ground motions. The critical duration of a ground motion is determined in order to limit the range in which the method of prediction is applicable.2. A method is proposed to predict the maximum seismic response of single-degree-of-freedom systems with polylinear load-displacement relationships. Based on the balance between earthquake input energy and absorbed energy during a half-cycle of a vibration, the maximum seismic response is derived as a function of the damage-causing earthquake input energy and the maximum half-cycle energy input ratio. The applicability of the proposed method is confirmed through comparisons with numerical results of various single-degree-freedom systems.3. A procedure for seismic design has been proposed to estimate the ductility demanded of beams in steel … More moment frames that sustain overall collapse mechanisms. In this study, a method is presented to predict a collapse mechanism that will most likely form in a frame structure under severe earthquake excitations, and the amplification factor of the ductility demand is determined based on the predicted collapse mechanism. The seismic responses of steel frames that sustain various collapse mechanisms are examined numerically. The results of the proposed method favor the overestimation of ductility demand for frames that sustain partial collapse mechanisms in a few stories but the approximation of the upper limit of numerical results.4. Critical parameters that control the earthquake response of steel frames with hysteretic dampers are characterized and incorporated into the equivalent single-degree-of-freedom representation. Maximum and cumulative plastic deformations induced in hysteretic dampers are derived in explicit forms as functions of these parameters, and the accuracy of the estimations of plastic deformations is demonstrated through a comparison with numerical results. Less

本课题的研究成果总结如下：1.研究结果表明：能量输入可以用伪速度响应谱来预测。然而，这种预测方法不能应用于极长的地面运动。确定地面运动的临界持续时间是为了限制预测方法的适用范围。提出了一种预测具有多线性荷载-位移关系的单自由度体系最大地震反应的方法。基于半周期内地震输入能量与吸收能量的平衡关系，推导出最大地震响应是引起破坏的地震输入能量与最大半周期能量输入比的函数。通过与各种单自由度系统数值结果的比较，验证了所提方法的适用性。提出了一种抗震设计程序来估计钢梁的延性要求。本文提出了一种预测框架结构在强烈地震作用下最可能形成的倒塌机制的方法，并根据预测的倒塌机制确定了延性需求的放大系数。对支撑不同倒塌机制的钢框架的地震反应进行了数值分析。所提出的方法的结果有利于对承受部分倒塌机制的框架的延性需求的高估，但近似于数值结果的上限。对控制滞回阻尼钢框架地震反应的关键参数进行了表征，并将其纳入等效单自由度表示中。以这些参数的函数形式导出了滞回阻尼器中引起的最大塑性变形和累积塑性变形，并通过与数值结果的比较证明了塑性变形估计的准确性。少

项目成果

小川厚治: "鋼構造ラーメン骨組の梁の必要塑性変形性能に関する研究"日本建築学会構造系論文集. 第547号. 177-184 (2001)

小川敦二：《钢刚性框架中梁所需塑性变形性能的研究》日本建筑学会结构工程学报第547. 177-184号（2001年）。

K. Ogawa and N. Yokoyama: "Ductility Demanded of Beams in Steel Moment Frames"J. Struct. Constr. Eng., AIJ. No. 547. 177-184 (2001)

K. Okawa 和 N. Yokoyama：“钢矩框架中梁的延展性要求”J。

小川厚治: "履歴型ダンパーの必要塑性変形性能に関する研究"日本建築学会構造系論文集. 第558号. 197-204 (2002)

小川敦二：《迟滞阻尼器所需塑性变形性能的研究》日本建筑学会结构工程学报第558期。197-204（2002）。

M. Nakashima, K. Ogawa and K. Inoue: "Generic frame model for simulation of earthquake responses of steel moment frames"Earthquake Engineering and Structural Dynamics. Vol. 31. 671-692 (2002)

M. Nakashima、K. Okawa 和 K. Inoue：“用于模拟钢矩框架地震响应的通用框架模型”地震工程和结构动力学。

小川厚治: "地震入力エネルギーに基づくポリリニア系の最大地震応答の予測に関する研究"日本建築学会構造系論文集. 第557号. 167-174 (2002)

Atsuji Okawa：“基于地震输入能量预测多线性系统最大地震响应的研究”日本建筑学会结构工程论文集第 557. 167-174 号（2002 年）。