钢筋混凝土结构可靠度设计2种近似方法的比较
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摘要
基于钢筋混凝土结构可靠度的基本原理,分析了结构可靠度设计的近似方法,即"中心点法"和"验算点法(JC法)"。通过应用算例来说明如何使用这2种方法,并对这2种可靠度设计的近似方法进行了比较与分析,结果表明:"中心点法"的特点是计算过程相对简单,能够直观表示出可靠指标β与随机变量统计参数的关系,应用较广泛;而"验算点法(JC法)"的特点是计算工作量相对不多,并运用迭代法计算结构可靠指标β,提高了β值的计算精度。分析表明混凝土结构可靠度分析的近似方法具有一定的计算精度。
Two approximate methods for analyzing structure reliability,"central point method"and"checking point method( JC method) ",were compared based on the basic principle of structural reliability of reinforced concrete. The usage of these two methods was illustrated by an example. The results showed that "central point method"was widely used for its relatively simple calculation process and the visual representation of the relationship between the reliable index and the statistical parameters of random variables. Comparatively,"checking point method"( JC method) had less calculation work,and the structural reliability index was more precise because of the use of iterative method. It is concluded that the approximate methods of reliability analysis of concrete structure has certain accuracy.
Two approximate methods for analyzing structure reliability,"central point method"and"checking point method( JC method) ",were compared based on the basic principle of structural reliability of reinforced concrete. The usage of these two methods was illustrated by an example. The results showed that "central point method"was widely used for its relatively simple calculation process and the visual representation of the relationship between the reliable index and the statistical parameters of random variables. Comparatively,"checking point method"( JC method) had less calculation work,and the structural reliability index was more precise because of the use of iterative method. It is concluded that the approximate methods of reliability analysis of concrete structure has certain accuracy.
引文
[1] GB50153—2008工程结构可靠性设计统一标准[S].北京:中国建筑工业出版社,2008.
[2]江见鲸,李杰,金伟良.高等混凝土结构理论[M].北京:中国建筑工业出版社,2006.
[3] GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[4]张伟.结构可靠性理论与应用[M].北京:科学出版社,2007.
[5]刘相.混凝土矩形截面梁经济配筋率与造价探讨分析[J].辽东学院学报(自然科学版),2017,24(2):129-140.
[6]刘相.碳纤维布加固损伤混凝土梁抗弯性能试验研究[J].工程抗震与加固改造,2016,38(4):114-120.
[7]刘相. CFRP加固混凝土梁配布(筋)率优化与造价研究[J].吉林建筑大学学报,2018,35(3):15-24.
[8]刘相,姜鸿. CFRP加固素混凝土梁配布率优化与造价分析[J].辽东学院学报(自然科学版),2018,25(3):219-223.
[9]刘相,崔熙光. CFRP加固损伤混凝土梁截面短期刚度探讨分析[J].结构工程师,2018,34(5):149-155.
[10]刘相,崔熙光. CFRP加固混凝土梁配布(筋)率优化与造价模拟分析[J].沈阳工业大学学报,2018,40(6):713-720.
[11]刘相.中美英钢筋混凝土梁实用设计方法规范的比较[J].辽东学院学报(自然科学版),2019,26(1):54-58.
[12]赵国藩.高等钢筋混凝土结构学[M].北京:机械工业出版社,2005.
[2]江见鲸,李杰,金伟良.高等混凝土结构理论[M].北京:中国建筑工业出版社,2006.
[3] GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[4]张伟.结构可靠性理论与应用[M].北京:科学出版社,2007.
[5]刘相.混凝土矩形截面梁经济配筋率与造价探讨分析[J].辽东学院学报(自然科学版),2017,24(2):129-140.
[6]刘相.碳纤维布加固损伤混凝土梁抗弯性能试验研究[J].工程抗震与加固改造,2016,38(4):114-120.
[7]刘相. CFRP加固混凝土梁配布(筋)率优化与造价研究[J].吉林建筑大学学报,2018,35(3):15-24.
[8]刘相,姜鸿. CFRP加固素混凝土梁配布率优化与造价分析[J].辽东学院学报(自然科学版),2018,25(3):219-223.
[9]刘相,崔熙光. CFRP加固损伤混凝土梁截面短期刚度探讨分析[J].结构工程师,2018,34(5):149-155.
[10]刘相,崔熙光. CFRP加固混凝土梁配布(筋)率优化与造价模拟分析[J].沈阳工业大学学报,2018,40(6):713-720.
[11]刘相.中美英钢筋混凝土梁实用设计方法规范的比较[J].辽东学院学报(自然科学版),2019,26(1):54-58.
[12]赵国藩.高等钢筋混凝土结构学[M].北京:机械工业出版社,2005.