北京航空航天大学学报 ›› 2005, Vol. 31 ›› Issue (08): 925-929.

• 论文 • 上一篇    下一篇

在役钢结构概率安全评定方法

骆红云, 钟群鹏, 张峥   

  1. 北京航空航天大学 材料科学与工程学院, 北京 100083
  • 收稿日期:2004-04-02 出版日期:2005-08-31 发布日期:2010-09-20
  • 作者简介:骆红云(1970-),女,山东海阳人,博士后, luo7128@163.com.
  • 基金资助:

    院士行资助项目

Investigation of probabilistic safety assessment for in-service mechanical equipment steel structures

Luo Hongyun, Zhong Qunpeng, Zhang Zheng   

  1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2004-04-02 Online:2005-08-31 Published:2010-09-20

摘要: 针对大型在役钢结构的安全评定问题,综合利用第二水平法和Monte Carlo法,提出了静载和疲劳条件下概率安全评定的方法;并利用三阶段腐蚀规律对海洋气候腐蚀条件下概率安全评定过程进行了修正.以青岛港装船机主梁和翻车机端环为例进行了实际结构的安全评定分析计算,分别得出了这些结构中一些缺陷的确定性和概率安全评定结果.2种评定结果是大体上是相近的,但也存在一些不同.通过对这些确定性和概率安全评定结果的对比分析,得到了确定性和概率性安全评定方法的初步关系式—近似为单对数线性关系,此结论为概率安全评定方法的工程化奠定了基础.

Abstract: To solve the safety assessment problem of large-scale in-service mechanical equipments’ steel structure , the probabilistic safety assessment method was proposed under the dead load and fatigue conditions with the aid of second level method and Monte Carlo method. Amended equation of it was established according to the three-period corrosion law in consider of corrosion lost under marine environment with which the ship loader bridge and wagon tipper in Qingdao Port were calculated and analyzed. Both definite safety assessment and the probabilistic safety assessment results were obtained. The results from the two assessment methods were generally closed but still there was little difference between them. The primary relation-approximately logarithm relationship,between the definite safety assessment and the probabilistic safety assessment was obtained from the comparative investment between the results of two kinds of assessment methods. The relationship obtained is the key point for the effectively application of the concerned probabilistic safety assessment method to in-service mechanical equipments’ steel structure.

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