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(1 湖南大學(xué)土木工程學(xué)院， 長(zhǎng)沙 410082； 2 湖南大學(xué)建筑安全與節(jié)能教育部重點(diǎn)實(shí)驗(yàn)室， 長(zhǎng)沙 410082)

［摘要］收集了國(guó)內(nèi)外再生混凝土梁剪切破壞和彎曲破壞的試驗(yàn)數(shù)據(jù)，分別建立數(shù)據(jù)庫(kù)。通過(guò)將試驗(yàn)數(shù)據(jù)與中國(guó)規(guī)范GB 50010—2010、歐洲規(guī)范MC 2010的抗彎承載力公式計(jì)算結(jié)果作對(duì)比，與中國(guó)規(guī)范GB 50010—2010、美國(guó)規(guī)范ACI 318-14和Zsutty的抗剪承載力公式計(jì)算結(jié)果作對(duì)比，分析各公式預(yù)測(cè)結(jié)果的準(zhǔn)確性，同時(shí)基于各具體變量因素，考慮中國(guó)規(guī)范GB 50010—2010公式的準(zhǔn)確性，并且分析中國(guó)規(guī)范公式用于再生混凝土梁極限承載力計(jì)算時(shí)的可靠性。結(jié)果表明：對(duì)于再生混凝土梁的抗彎承載力計(jì)算，中國(guó)規(guī)范GB 50010—2010和歐洲規(guī)范MC 2010公式的預(yù)測(cè)結(jié)果相差不大，準(zhǔn)確度較高，且中國(guó)規(guī)范GB 50010—2010公式的可靠度指標(biāo)滿足構(gòu)件延性破壞時(shí)的規(guī)定，不需要對(duì)公式進(jìn)行進(jìn)一步的修正。對(duì)于再生混凝土梁的抗剪承載力計(jì)算，Zsutty公式的預(yù)測(cè)結(jié)果最為準(zhǔn)確，其他兩種公式的預(yù)測(cè)結(jié)果較為保守；在荷載分項(xiàng)系數(shù)修改前后, 中國(guó)規(guī)范公式的可靠度指標(biāo)均值分別為3.61和3.85，可靠度指標(biāo)隨著荷載分項(xiàng)系數(shù)的提高而增大；修正公式在新荷載分項(xiàng)系數(shù)下的可靠度指標(biāo)均值為3.72，更加經(jīng)濟(jì)，并滿足構(gòu)件脆性破壞時(shí)的要求。 

［關(guān)鍵詞］再生混凝土梁； 抗彎承載力； 抗剪承載力； 數(shù)據(jù)庫(kù)； 計(jì)算方法； 可靠度分析 

中圖分類號(hào)：TU375-1 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)11-0073-09

Research on calculation method and reliability of ultimate bearing capacity of recycled concrete beam based on experimental data 

HUANG  Liang1,2,  QIN  Mingzhu1,  DENG  Peng1,  GAO  Chang1 

(1 Department of Civil Engineering, Hunan University， Changsha 410082， China； 2 Key Laboratory of Building Safety and Energy Efficiency, Hunan University， Changsha 410082， China) 

Abstract: The experimental data of shear failure or flexural failure of recycled concrete beams at home and abroad were collected, and the databases were established respectively. By comparing the experimental data with the calculation results of the flexural capacity formula of Chinese code GB 50010—2010 and European code MC 2010, and the calculation results of the shear capacity formula of Chinese code GB 50010—2010, American code ACI 318-14 and Zsutty, the accuracy of the prediction results of each formula was analyzed. Meanwhile, based on the specific variable factors, the accuracy of the formula in Chinese code GB 50010—2010 was evaluated. The reliability of the formula in Chinese code used in the calculation of the ultimate bearing capacity of recycled concrete beams was analyzed. The results show that: for the calculation of the flexural capacity of recycled concrete beams, the prediction results of the Chinese code GB 50010—2010 and the European code MC 2010 formula were just slightly different and highly accurate. Also, the reliability index of the formula in Chinese code GB 50010—2010 meets the requirements of ductility failure, so it is not necessary to further modify the formula. For the calculation of shear capacity of recycled concrete beams, the prediction results of Zsutty’s formula are the most accurate, and the prediction results of the other two formulas are more conservative; before and after the modification of the partial load coefficient, the reliability indexes of the Chinese code formula are 3.61 and 3.85 respectively, and the reliability index increases with the increase of the partial load coefficient; under the new partial load coefficient, the reliability index of the modified formula is 3.72, which means more economical, and meets the requirements of brittle failure of the component. 

Keywords:recycled concrete beam； flexural capacity； shear capacity； database； calculation method； reliability analysis

*國(guó)家重點(diǎn)研發(fā)計(jì)劃（2017YFC0703300）。

 作者簡(jiǎn)介：黃靚，博士，教授，博士生導(dǎo)師，Email: huanglaingstudy@126.com。