- 湯婷婷1,王德才2,黃俊旗3
2022年第3期
摘要
引用本文
摘 ? 要:為提高鋼筋混凝土梁抗剪性能數值模型的精度,在已有12根不同強度、剪跨比和配箍率的鋼筋混凝土梁抗剪性能試驗基礎上,基于混凝土塑性損傷模型建立了數值模型,研究了模型網格尺寸、剪脹角以及不變量應力比對數值分析結果的影響,并對12根鋼筋混凝土梁進行了優化模擬分析。結果表明:網格尺寸的提高將降低數值模型分析所得剛度與承載力;剪脹角的增加將提高數值模型分析所得承載力,而不變量應力比對模型分析結果并無影響;基于優化參數所建立的數值模型可以較好的為鋼筋混凝土抗剪性能評估提供參考。
Abstract: In order to improve the accuracy of numerical model for the shear performance of reinforced concrete(RC) beams, numerical analysis with concrete damage plasticity was conducted based on the existing shear test of twelve RC beams with different concrete strengths, shear span-to depth ratios and stirrup ratios. The influence of mesh size, dilation angle and invariant stress ratio on the obtained analysis result was evaluated, and the optimized parameter values were obtained. Based on the optimal values, numerical analysis was conducted on the twelve RC beams to reproduce the test result. The results indicate that the increase in mesh size can reduce the obtained stiffness and load carrying capacity of the specimen; the increase in dilation angle can enhance the obtained load carrying capacity, while the shape factor has no effect on the analysis result; the numerical model based on the optimal values can be used for assessing the shear performance of the RC beams.
湯婷婷,王德才,黃俊旗.鋼筋混凝土梁抗剪性能數值模型參數取值研究[J].混凝土與水泥制品,2022(3):50-55.
TANG T T,WANG D C,HUANG J Q.Value Study of Numerical Model on Shear Performance of Reinforced Concrete Beams[J].China Concrete and Cement Products,2022(3):50-55.