摘要
为提高钢筋混凝土梁抗剪性能数值模型的精度,在已有12根不同强度、剪跨比和配箍率的钢筋混凝土梁抗剪性能试验基础上,基于混凝土塑性损伤模型建立了数值模型,研究了模型网格尺寸、剪胀角以及不变量应力比对数值分析结果的影响,并对12根钢筋混凝土梁进行了优化模拟分析。结果表明:网格尺寸的提高将降低数值模型分析所得刚度与承载力;剪胀角的增加将提高数值模型分析所得承载力,而不变量应力比对模型分析结果并无影响;基于优化参数所建立的数值模型可以较好地为钢筋混凝土梁抗剪性能评估提供参考。
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.
作者
汤婷婷
王德才
黄俊旗
TANG Ting-ting;WANG De-cai;HUANG Jun-qi(Department of Architecture and Civil Engineering,Hefei Science and Technology College,Hefei 231201,China;School of Architecture and Arts,Hefei University of Technology,Hefei 230009,China;School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《混凝土与水泥制品》
2022年第3期50-55,共6页
China Concrete and Cement Products
基金
国家自然科学基金项目(51708165)
安徽省装配式建筑研究院开放课题项目(AHZPY20202KF)。
关键词
钢筋混凝土
数值模拟
网格尺寸
剪胀角
不变量应力比
Reinforced concrete
Numerical analysis
Mesh size
Dilation angle
Invariant stress ratio
