| 基于重要抽样法的梁的时变可靠性研究 |
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| 引用本文： | 谭文辉,裴永刚.基于重要抽样法的梁的时变可靠性研究[J].工业建筑,2008(Z1). |
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| 作者姓名： | 谭文辉 裴永刚 |
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| 作者单位： | 北京科技大学土木系 北京100083(谭文辉)，北京市水利水电技术中心 北京100073(裴永刚) |
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| 摘 要： | 基于已有的混凝土结构耐久性的研究成果及一般大气环境指标下的结构抗力、荷载及荷载效应的特征和概率模型,提出了计算随时间变化的结构可靠度的简化方法,应用该法对一钢筋混凝土梁的时变性进行了可靠性分析。研究表明:随着结构抗力的衰减,结构的可靠性大为降低,钢筋混凝土梁在50年内的可靠性几乎降低了一倍。因此,无论是在役结构的可靠性分析还是拟建结构的可靠性设计都必须考虑时变性。
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| 关 键 词： | 可靠性 时变性 重要抽样法 |
TIME-DEPENDENT RELIABILITY OF REINFORCED CONCRETE BEAM BASED ON IMPORTANT SAMPLING METHOD |
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| Tan Wenhui.TIME-DEPENDENT RELIABILITY OF REINFORCED CONCRETE BEAM BASED ON IMPORTANT SAMPLING METHOD[J].Industrial Construction,2008(Z1). |
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| Authors: | Tan Wenhui |
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| Abstract: | A simplified method on time-dependent reliability of structure is proposed based on the achievement of durability of reinforcement concrete structure,the character and probability model of structure resistance,load and load affect under common environment.The method is used to analyze the time-dependent reliability of a reinforced concrete beam.The research shows: the structure reliability will reduce along with the attenuation of structure resistance,the reliability of beam almost decrease a half after fifty years.Therefore,time-dependence should be considered in reliability analyzing of an in service structure and reliability designing of planning structure. |
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| Keywords: | reliability time-dependence important sampling method |
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