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呂艷梅1，易偉建2
(1 廣東省建筑設(shè)計研究院，廣州510010; 2 湖南大學(xué)，長沙410082)[摘要] 收集了國內(nèi)外文獻(xiàn)中的337根集中荷載作用下無腹筋梁的剪切破壞試驗數(shù)據(jù)，將所有試驗梁的試驗結(jié)果與我國規(guī)范GB50010-2002、美國規(guī)范ACB18-05、歐洲規(guī)范EC2-02以及Zsutty公式的預(yù)測結(jié)果進(jìn)行比較，分析各計算方法的優(yōu)缺點，以及對各抗剪承載力影響因素的考慮是否得當(dāng)。結(jié)果表明：Zsutty方法的預(yù)測結(jié)果最為精確，其次是我國規(guī)范GB50010-2002方法，美國規(guī)范ACI 318-05和歐洲規(guī)范EC2-02的預(yù)測結(jié)果比較保守；四種預(yù)測方法的對于縱筋配筋率小于1%的梁、有效高度較大的深梁，預(yù)測結(jié)果安全度偏低。
[關(guān)鍵詞] 高強(qiáng)混凝土；無腹筋梁；抗剪承載力Research on shear strength of high strength concrete beams:I Beam without web reinforcement
Lu Yanmei1, Yi Weijian2
(1The Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China; 2 Hunan University, Changsha 410082, China)Abstract: Expenmental data of 337 beams without web reinforcement in shear failure was collected. The testing results are compared with failure shear strength calculated by GB50010-2002, ACB18-05, EC2-02, and Zsutty equation, not only the advantages and disadvantages of these methods but also the feasibility of these considerations on influential variables of shear strength are analyzed. The analysis results show that Zsutty equation has the best prediction for shear strength of concrete beams, in the next place is GB code equation, and ACI and EC code equation underestimates the shear strength of beams. Besides, four methods are unsafe for beams with longitudinal reinforcement ratios less than 1% and deeper beams with larger effective depth.
Keywords: high strength concrete; beam without web reinforcement; shear strength
