| 结构抗震设计中的强度折减系数研究 |
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| 引用本文： | 卓卫东,范立础.结构抗震设计中的强度折减系数研究[J].地震工程与工程振动,2001,21(1):84-88. |
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| 作者姓名： | 卓卫东 范立础 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室, |
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| 基金项目： | 国家自然科学基金!59778029项目，建设部“城市桥梁抗震设计规范”项目 |
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| 摘 要： | 借助于单自由度弹塑性动力时程分析程序，对延性结构的强度折减系数进行了研究，在统计平均和回归分析的基础上，建立了平均强度折系数的函数形式，本文所建立的平强度折减系数函数，从理论上明确了结构具有延性对弹性地震力的折减关系，研究成果可供结构抗震设计规范采纳应用。
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| 关 键 词： | 结构 抗震设计 强度折减系数 地震动 桥梁 滞回模型 |
| 文章编号： | 1000-1301(2001)01-0084-05 |
On strength reduction factors used for seismic design of structures |
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| ZHUO Wei-dong,FAN Li-chu.On strength reduction factors used for seismic design of structures[J].Earthquake Engineering and Engineering Vibration,2001,21(1):84-88. |
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| Authors: | ZHUO Wei-dong FAN Li-chu |
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| Abstract: | Based on a nonlinear time-history analysis program for single-degree-of-freedom inelastic systems, investigation of strength reduction factors used for seismic design of structures is carried out in this paper. The functional expressions of mean strength reduction factors are evaluated by statistical mean method and regression analysis. The proposed expressions theoretically demonstrate the deamplification factors for elastic strength demand induced by strong earthquake ground motions and the displacement ductility of structures. The presented results are suitable for the provisions of the current seismic design codes. |
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| Keywords: | structures seismic design strength reduction factors |
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