| Load history-based model for prestressed concrete beam damage evaluation |
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| 作者姓名： | 袁建力 王仪 钱仲慧 |
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| 作者单位： | College of Architecture Science and Engineering Yangzhou University，College of Architecture Science and Engineering Yangzhou University，College of Architecture Science and Engineering Yangzhou University，Yangzhou 225009 China，Yangzhou 225009 China，Yangzhou 225009 China |
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| 基金项目： | Science Foundation of Jiangsu Province for the scholar abroad Under Grant No. SJ200325 |
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| 摘 要： | The residual capability of a damaged structure to resist further load is essential in optimal seismic design and post-earthquake strengthening. An experimental study on the hysteretic characteristics of prestressed concrete frame beams under different loading histories was performed to explore the influence of load history on energy dissipation and failure characteristics of the member. Based on the test results, the failure of the beam is def ined, and the relationship between the failure moment under cyclic load and from the skeleton curve is formulated. Finally, based on displacement and energy dissipation, a model for prestressed concrete beam damage-failure evaluation is developed. In this model, the effect of deformation level, cumulative dissipated energy, and loading history on prestressed concrete beam damage–failure is incorporated, thus it is applicable to stochastic earthquake forces.
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| 关 键 词： | prestressed concrete earthquake force load history energy dissipation damage–failure evaluation |
| 收稿时间： | 6 June 2007 |
| 修稿时间： | 5 July 2007 |
Load history-based model for prestressed concrete beam damage evaluation |
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| Jianli Yuan,Wang Yi,Zhonghui Qian.Load history-based model for prestressed concrete beam damage evaluation[J].Earthquake Engineering and Engineering Vibration,2007,6(4):383-390. |
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| Authors: | Jianli Yuan Wang Yi Zhonghui Qian |
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| Institution: | College of Architecture Science and Engineering,Yangzhou University,Yangzhou 225009,China |
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| Abstract: | The residual capability of a damaged structure to resist further load is essential in optimal seismic design and post-earthquake strengthening.An experimental study on the hysteretic characteristics of prestressed concrete frame beams under different loading histories was performed to explore the influence of load history on energy dissipation and failure characteristics of the member.Based on the test results,the failure of the beam is defined,and the relationship between the failure moment under cyclic load and from the skeleton curve is formulated.Finally,based on displacement and energy dissipation,a model for prestressed concrete beam damage-failure evaluation is developed.In this model,the effect of deformation level,cumulative dissipated energy,and loading history on prestressed concrete beam damage-failure is incorporated,thus it is applicable to stochastic earthquake forces. |
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| Keywords: | prestressed concrete earthquake force load history energy dissipation damage-failure evaluation |
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