| 引用本文: | 涂 雪,熊 文,肖汝诚,沈旭东,魏乐永.基于统计理论的桥梁应力趋势预测与评估方法[J].哈尔滨工业大学学报,2012,44(4):105.DOI:10.11918/j.issn.0367-6234.2012.04.021 |
| TU Xue,XIONG Wen,XIAO Ru cheng,SHEN Xu dong,WEI Le yong.Prediction of stress development and condition assessment of bridge structures based on statistics theory[J].Journal of Harbin Institute of Technology,2012,44(4):105.DOI:10.11918/j.issn.0367-6234.2012.04.021 |
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| 摘要: |
| 针对监测应力的复杂构成及监测数据较低的使用效率，提出一种基于统计理论的新型桥梁应力趋势预测评估方法. 该方法主要基于统计理论，将季节性荷载、随机性荷载产生的应力从应力监测值中分离，然后准确观测并拟合结构退化所引起的应力变化趋势，最后对结构退化过程给出理论预测，并以此准确量化评估结构安全性能. 该方法在整个评估过程中可充分利用每一个监测数据，并可实时根据新的观测数据进行评估修正. 通过在实桥的成功应用，证明了基于统计理论的新型桥梁应力趋势预测评估方法的优势性. |
| 关键词: 桥梁 应力趋势 季节性应力 预测 状态评估 结构退化 |
| DOI：10.11918/j.issn.0367-6234.2012.04.021 |
| 分类号:U44827 |
| 基金项目:国家高技术研究发展计划项目（2006AA11Z120） |
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| Prediction of stress development and condition assessment of bridge structures based on statistics theory |
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TU Xue1, XIONG Wen2, XIAO Rucheng1, SHEN Xudong3, WEI Leyong4
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1.Dept. of Bridge Engineering, Tongji University, 200092 Shanghai,China;2.Dept. of Bridge Engineering, School of
Transportation, Southeast University, 210096 Nanjing, China;3.Zhejiang Provincial Institute of Communications Planning,
Design ＆ Research, 310006 Hangzhou,China;4.CCCC Highway Consultants CO.,Ltd., 100085 Beijing, China
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| Abstract: |
| To deal with the complex constituent of measured stress and low efficiency of utilizing the vast measured data, this paper developed a new approach for the prediction of stress development and condition assessment of bridge structures based on statistics theory. This method separates the stress with seasonal distribution and stochastic distribution from the whole measured stress using the statistics theory. By doing this, the stress development due to the structure deterioration can be observed and theoretically predicted, which gives a quantifiable structure assessment. Every data measured in the real time measurement can be used to give the assessment results and each newly measured data in future can be applied to further update the results. A case study was finally conducted to show and prove the advantages of the proposed method. |
| Key words: bridge structures stress development stress with seasonal distribution prediction condition assessment structure deterioration |
