Capacity Requreiment of Steel Moment Frames in Compliance with Seismic Demand

满足抗震要求的钢弯矩框架的承载力要求

• 批准号: 11650590
• 负责人: OGAWA Koji
• 金额: $ 2.3万
• 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: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650590/
• 关键词: seismic design; steel moment frame; earthquake input energy; fishbone-shaped frame; equivalent SDOF; maximum seismic response; residual deformation; ductility demand; 最大変位; 累積塑性変形; 梁降伏型

The results obtained from this project are summarized as follows :1. Damage-causing earthquake input energy used in energy-based seismic design is defined as the maximum response of the sum of elastic strain energy and plastic dissipated energy. The input energy can be predicted by using a pseudo-velocity response spectrum corresponding to the apparent natural period of a frame, which is determined based on the mean of the plastic dissipated energy per half-cycle in the whole vibration.2. Maximum half-cycle energy input ratio is defined as the ratio of the maximum increment of the sum of elastic strain energy and plastic dissipated energy during a half-cycle of vibration to the damage-causing earthquake input energy. The maximum half-cycle energy input ratio is evaluated by extensive numerical response analysis. A method is proposed to predict the maximum seismic response and residual deformation of bilinear systems based on the balance between input energy and absorbed energy during a … More half-cycle of vibration.3. An equivalent single-degree-of-freedom system is proposed that can simulate the seismic response of a multistory frame. A method for predicting the collapse mechanism under earthquake excitations is devised, taking into consideration the correlation between dynamic horizontal forces acting on each story. In addition, load-deformation relationships of equivalent single-degree-of-freedom systems are determined based on the predicted collapse mechanism.4. A seismic design procedure is proposed to estimate the ductility demanded of beams in strong-column/weak-beam steel frames. Critical parameters that control the earthquake response of steel frames are characterized and incorporated into the equivalent single-degree-of-freedom representation. Maximum and cumulative plastic rotations induced into beam-ends are derived in explicit forms as functions of these parameters, and the accuracy of the estimated rotations is demonstrated through comparison with numerical results. Less

1.将基于能量的抗震设计中使用的致灾地震输入能量定义为弹性应变能和塑性耗散能之和的最大响应。输入能量可以通过与框架的表观固有周期相对应的拟速度反应谱来预测，该谱是根据整个振动中每半周的塑性耗散能量的平均值确定的。最大半周能量输入比定义为半周振动过程中弹性应变能和塑性耗散能之和的最大增量与致灾地震输入能量之比。通过广泛的数值响应分析，确定了最大半周能量输入比。提出了一种基于…过程中输入能量和吸收能量平衡的双线性体系最大地震反应和残余变形的预测方法振动的半周期较多。提出了一种可以模拟多层框架地震反应的等效单自由度体系。考虑了各层动力水平力之间的相关性，提出了地震作用下倒塌机理的预测方法。此外，基于预测的倒塌机理，确定了等效单自由度体系的荷载-变形关系。提出了强柱弱梁钢框架中梁的延性要求的抗震设计方法。对控制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法中。以显式形式导出了梁端塑性最大转角和累积转角作为这些参数的函数，并通过与数值结果的比较，验证了估计转角的准确性。较少

项目成果

K.Ogawa: "Equivalent Single-Degree-of-Freedom Systems for Fishbone-Shaped Frames"J.Struct.Constr.Eng., AIJ. No.539. 143-150 (2001)

K.Okawa：“鱼骨形框架的等效单自由度系统”J.Struct.Constr.Eng.，AIJ。

平野智久: "Polylinear型の復元力特性をもつ1自由度系の地震入力エネルギーに関する研究"構造工学論文集. Vol.48B. (2000)

Tomohisa Hirano：“具有多线性恢复力特性的一自由度系统的地震输入能量研究”《结构工程杂志》第 48 卷（2000 年）。

小川厚治: "梁降伏型鋼構造ラーメン部材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537号. 121-128 (2000)

Atsuji Okawa：“梁屈服钢框架构件所需塑性变形性能的研究”，日本建筑学会结构工程学报第 537. 121-128 号（2000 年）。

K.Ogawa: "Residual Deformation of Steel Frames with Hysteretic Dampers"J.Struct.Constr.Eng., AIJ. No.539. 151-158 (2001)

小川：“带有迟滞阻尼器的钢框架的残余变形”J.Struct.Constr.Eng.，AIJ。

小川厚治: "魚骨形骨組の等価1自由度系への置換に関する研究"日本建築学会構造系論文集. 第539号. 143-150 (2001)

Atsuji Okawa：“用等效的一自由度系统替代鱼骨框架的研究”日本建筑学会结构工程学报第 539. 143-150 号（2001 年）。