| 基于多层Bayes先验抗力模型的结构信息更新 |
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| 引用本文： | 王剑,刘西拉.基于多层Bayes先验抗力模型的结构信息更新[J].上海交通大学学报,2004,38(6):937-940. |
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| 作者姓名： | 王剑 刘西拉 |
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| 作者单位： | 1. 清华大学,土木工程系,北京,100084
2. 上海交通大学,建筑工程与力学学院,上海,200030 |
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| 基金项目： | 国家重点基础研究发展规划(973)项目(2002CB412709) |
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| 摘 要： | 根据结构抗力蜕化的特点，针对模型选择和模型参数的主观不确定性，建立了多层Bayes先验抗力模型，推导了基于直接检测、同类结构检测、荷载验证3种具体信息的模型更新方法．算例分析表明，多层Bayes先验抗力模型可以较好地考虑主观不确定性，由此实现的信息更新能够综合先验信息和结构具体信息，使主观不确定性得到减小，结构可靠性评估预测更为接近真实情况．
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| 关 键 词： | 结构可靠性 结构模型 信息更新 主观不确定性 多层Bayes模型 |
| 文章编号： | 1006-2467(2004)06-0937-04 |
| 修稿时间： | 2003年7月14日 |
Information Updating Based on Multi-layer Bayes Structural Resistance Model |
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| WANG Jian,LIU Xi-la.Information Updating Based on Multi-layer Bayes Structural Resistance Model[J].Journal of Shanghai Jiaotong University,2004,38(6):937-940. |
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| Authors: | WANG Jian LIU Xi-la |
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| Institution: | WANG Jian~1,LIU Xi-la~2 |
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| Abstract: | According to the characteristic of structural resistance degradation, a multi-layer Bayes resistance model was established to take into account the epistemic uncertainties in model selection and model parameters. The random variables in model selection and model parameters can be updated with the introduction of new information, including direct inspection, indirect inspection and proof loading. With a case study the updating procedure was illustrated. It shows that the multi-layer Bayes model can efficiently regard the epistemic uncertainties, and the information updating can combine prior information and specific information to reduce knowledge-based epistemic uncertainties, thus makes reliability analysis more accurate. |
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| Keywords: | structural reliability strucural models information updating epistemic uncertainties multi-layer Bayes model |
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