- 摘 要
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(湖南大學土木工程學院， 長沙 410082)
［摘要］為了研究中美兩國混凝土結(jié)構(gòu)設計規(guī)范可靠度水平的差異，對比分析了中國混凝土結(jié)構(gòu)規(guī)范GB 50010—2010和美國混凝土結(jié)構(gòu)規(guī)范ACI 318-11中關于混凝土受彎、受剪等承載力設計公式。首先討論并建立新的比較標準。其次通過搜集國內(nèi)外關于受彎構(gòu)件和受剪構(gòu)件的試驗數(shù)據(jù)，根據(jù)材料強度換算關系，分析得到關于受彎、受剪承載力公式的計算模式不確定系數(shù)的統(tǒng)計參數(shù)。最后在確定材料不確定性、幾何不確定性以及荷載的統(tǒng)計規(guī)律后，運用一次二階矩法對混凝土構(gòu)件受彎與受剪進行了可靠指標的分析。計算結(jié)果顯示美國規(guī)范可靠度水平高于中國規(guī)范。
［關鍵詞］鋼筋混凝土； 設計規(guī)范； 可靠度； 不確定性
中圖分類號：TU375文獻標識碼：A文章編號：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
*國家自然科學基金資助 (51338004)。
作者簡介：易偉建，博士，教授，博士生導師，Email:wjyi@hnu.edu.cn。
