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(1 廣西大學(xué)土木建筑工程學(xué)院， 南寧 530004； 2 工程防災(zāi)與結(jié)構(gòu)安全教育部重點(diǎn)實(shí)驗(yàn)室，南寧 530004； 3 廣西防災(zāi)減災(zāi)與工程安全重點(diǎn)實(shí)驗(yàn)室， 南寧 530004)

［摘要］為了分析鋼筋混凝土（RC）梁抗剪承載力模型的計(jì)算精度和適用性，系統(tǒng)分析了國(guó)內(nèi)外設(shè)計(jì)規(guī)范中6個(gè)比較典型的RC梁抗剪承載力模型的計(jì)算模式不定性。首先基于100組RC梁的抗剪承載力試驗(yàn)數(shù)據(jù)，對(duì)比分析了不同抗剪承載力模型的計(jì)算精度，確定了計(jì)算模式不定性的概率分布類(lèi)型、均值和標(biāo)準(zhǔn)差等統(tǒng)計(jì)信息；然后分別確定了各抗剪承載力模型具有不同保證率時(shí)的計(jì)算模式不定性特征值，從而可以對(duì)各抗剪承載力模型進(jìn)行修正。分析結(jié)果表明：中國(guó)、歐洲、美國(guó)和加拿大規(guī)范抗剪承載力模型的計(jì)算模式不定性服從對(duì)數(shù)正態(tài)分布，而澳大利亞和日本規(guī)范抗剪承載力模型的計(jì)算模式不定性服從移位瑞利分布。 

［關(guān)鍵詞］鋼筋混凝土梁； 抗剪承載力模型； 計(jì)算模式不定性； 概率統(tǒng)計(jì)特征 

中圖分類(lèi)號(hào)：TU375-1 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)11-0082-06

Uncertainty analysis of computational models for shear strength of reinforced concrete beams 

YU  Bo1,2,3,  TAO  Xiaolei1,  DING  Zihao1 

(1 School of Civil Engineering and Architecture, Guangxi University， Nanning 530004， China；2 Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education， Nanning 530004， China；3 Guangxi Key Laboratory of Disaster Prevention and Engineering Safety， Nanning 530004， China) 

Abstract: In order to analyze the computational accuracy and applicability of shear strength models of reinforced concrete (RC) beams, the computational model uncertainties of six typical shear strength models in different design codes of RC structures were investigated systematically. Firstly, based on 100 sets of tested data of shear strength of RC beams, the computational accuracy of different shear strength models were compared and analyzed, and the statistical information including probabilistic distribution type, mean value and standard deviation of computational model uncertainty were determined. Then the characteristic values of computational model uncertainty with different specific assurance rates were determined, which provides an approach to modify the shear strength models. Analysis results show that the computational model uncertainties of the Chinese, European, American, and Canadian code models yield the Lognormal distribution, while those of the Australian and Japanese code models yield the shifted Rayleigh distribution.  

Keywords:reinforced concrete beam； shear strength model； computational model uncertainty； probabilistic statistical characteristic

作者簡(jiǎn)介：余波，博士，教授，博士生導(dǎo)師，Email：gxuyubo@gxu.edu.cn。