(湖南大学土木工程学院， 长沙 410082)

［摘要］为了研究中美两国混凝土结构设计规范可靠度水平的差异，对比分析了中国混凝土结构规范GB 50010—2010和美国混凝土结构规范ACI 318-11中关于混凝土受弯、受剪等承载力设计公式。首先讨论并建立新的比较标准。其次通过搜集国内外关于受弯构件和受剪构件的试验数据，根据材料强度换算关系，分析得到关于受弯、受剪承载力公式的计算模式不确定系数的统计参数。最后在确定材料不确定性、几何不确定性以及荷载的统计规律后，运用一次二阶矩法对混凝土构件受弯与受剪进行了可靠指标的分析。计算结果显示美国规范可靠度水平高于中国规范。

［关键词］钢筋混凝土； 设计规范； 可靠度； 不确定性

中图分类号：TU375文献标识码：A文章编号：1002-848X(2017)04-0001-06

Comparison of reliability provisions in Chinese and American codes on structural concrete design

Yi Weijian, He Xiaohuangcan

(College of Civil Engineering, Hunan University, Changsha 410082, China)

Abstract:In order to research the reliability level provisions in Chinese and American codes on concrete structures design, the formulas about flexural capacity and shear capacity in Chinese code  of concrete structures GB 50010—2010 and American  concrete structure code ACI 318-11 were compared. First, a new comparing standard was established after discussion. Then after the test data of bending members and shear members at home and abroad were collected, the material strength conversion relationship was analyzed to obtain statistical parameters of uncertain coefficients of bending and shear bearing capacity calculation models. Finally, after the material uncertainty, geometric uncertainty and the statistical law of the loads were determined, the first-order second-moment method was used to analyze the reliability indexes of concrete members subjected to bending and shear force. The calculation results show that the reliability level of the American code is higher than that of Chinese code.

Keywords:reinforced concrete; design code; reliability; uncertainty

*国家自然科学基金资助 (51338004)。

作者简介：易伟建，博士，教授，博士生导师，Email:wjyi@hnu.edu.cn。