罗立胜,罗永峰,郭小农.既有钢结构构件安全性评定分析方法[J].湖南大学学报:自然科学版,2014,41(3):20~25
既有钢结构构件安全性评定分析方法
Analysis Method for Safety Assessment of Existing Steel Structure Member
  
DOI:
中文关键词:  既有钢结构构件  安全性  承载能力评定  可靠度调整系数
英文关键词:existing steel structure member  safety  bearing capacity evaluation  reliability adjustment coefficient
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作者单位
罗立胜,罗永峰,郭小农 (同济大学 建筑工程系上海200092) 
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中文摘要:
      考虑目标使用期对可靠度的影响,引入可靠度调整系数γa,建立了既有钢结构构件承载能力验算的极限状态表达式.比较分析了不同荷载折减方法,并选择“等超越概率法”计算得到了不同目标使用期的荷载折减系数.采用验算点法,得到了不同目标使用期既有钢结构构件的可靠度指标,计算结果表明,提出的验算表达式满足目标可靠指标的要求.最后依据满足目标可靠指标的程度提出了构件评级划分准则,并按照结构安全等级和构建重要性不同,分别给出了不同构件承载能力评定等级的具体定量参数限值.
英文摘要:
      Considering the effect of target period on reliability, the reliability adjustment coefficient γa was proposed in this paper, and the limit state criteria for safety evaluation of existing steel structure was established. By comparing different load reduction factor calculation method, the equal exceeding probability method was chosen and the load reduction factor of the different target periods of following service was obtained. Based on the checking point method, the reliability index of steel structure member with different target periods of following service was obtained. The result has shown that the proposed formula meet the requirements of target reliability index. According to the different satisfaction degrees of target reliability index, the classification criterion of the steel members was proposed and the limit value of parameter was given for the safe classes of structure and member importance.
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