- 摘 要
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袁健1，2,陳伯望2
（1 湖南大學土木工程學院， 長沙 410082； 2 中南林業(yè)科技大學土木工程與力學學院， 長沙 410004）
［摘要］收集整理國內(nèi)外420根鋼筋混凝土矩形截面有腹筋簡支梁的剪切試驗數(shù)據(jù)，對《混凝土結(jié)構(gòu)設(shè)計規(guī)范》（GB 50010—2010）、《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計規(guī)范》（JTG D62—2004）和美國規(guī)范ACI 318-11受剪承載力計算模型進行了誤差分析，并進一步分析了各規(guī)范最小配箍率的合理性。選取其中113根有腹筋梁與同條件無腹筋梁進行比較，得到了箍筋對梁的受剪承載力貢獻比例的變化趨勢。結(jié)果表明，對于集中荷載作用下有腹筋梁受剪承載力，《混凝土結(jié)構(gòu)設(shè)計規(guī)范》（GB 50010—2010）的計算公式預(yù)測值偏高，尤其是配置高強箍筋的普通強度混凝土梁；對于均布荷載作用下有腹筋梁受剪承載力，美國規(guī)范ACI 318-11預(yù)測結(jié)果的誤差較??；各規(guī)范的最小配箍率取值較合理，能有效地避免梁發(fā)生斜拉破壞。
［關(guān)鍵詞］鋼筋混凝土梁； 受剪承載力； 計算模型誤差； 箍筋作用； 最小配箍率
中圖分類號：TU318, TU375文獻標識碼：A文章編號：1002-848X(2016)02-0012-07
Shear capacity analysis for reinforced concrete beam based on test data
Yuan Jian1，2, Chen Bowang2
(1 College of Civil Engineering, Hunan University, Changsha 410082, China;
2 School of CivilEngineering and Mechanics, Central South University of Forestry and Technology,
Changsha 410004, China)
Abstract:The shear test data of 420 simply-supported rectangular cross-section reinforced concrete beams with stirrups from home and abroad were collected, and error analysis for shear capacity calculation model was carried out for several calculation models in Code for design of concrete structures (GB 50010—2010), Specification for design of reinforced concrete and prestressed concrete highway bridges and culverts (JTG D62—2004) and American code ACI 318-11. Moreover, the reasonability of the minimum stirrup ratio of above codes was further conducted. The changing trend of stirrups contribution to the shear capacity of beams was obtained by the comparison of selected 113 beams with stirrups and beams without stirrups under the same condition. The results show that the values of shear capacity of beams predicted by Code for design of concrete structures（GB 50010—2010）with stirrups subjected to concentrated loads are higher than the experimental ones, especially for normal strength concrete beams with high-strength stirrups. For shear capacity of beams with stirrups under uniformly distributed loads, American code ACI 318-11 provides less biased prediction. The values of minimum stirrup ratio in above three codes are reasonable, which can effectively avoid diagonal tension failure of beams.
Keywords:reinforced concrete beam; shear capacity; error of calculation model; stirrup effectiveness; minimum stirrup ratio
*住房和城鄉(xiāng)建設(shè)部科技研發(fā)項目（2013-K4-21），湖南省住房和城鄉(xiāng)建設(shè)廳科技項目（KY201318）。
作者簡介：袁健，博士研究生，講師，Email:yuanjian0571@163.com。
