| ABAQUS混凝土损伤塑性模型的动力性能分析 |
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| 引用本文： | 李敏,李宏男.ABAQUS混凝土损伤塑性模型的动力性能分析[J].地震学刊,2011(3):299-303. |
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| 作者姓名： | 李敏 李宏男 |
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| 作者单位： | 大连理工大学建设工程学部,辽宁大连116024 |
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| 基金项目： | 国家自然科学基金重大研究计划重点项目（90815026）; 国家地震专项（200808074）; 高等学校学科创新引智计划项目（B08014）资助 |
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| 摘 要： | 地震作用在混凝土结构上会在其材料中产生较高的应变率,混凝土材料具有一定的率敏感性,准确模拟混凝土结构在地震作用下的反应需采用混凝土动态本构模型。为评估ABAQUS有限元软件中的混凝土损伤塑性模型模拟混凝土动力性能的能力,采用该模型对混凝土材料和构件在不同加载速度下的动态反应进行了有限元数值分析。结果表明,随着加载速度的提高,混凝土的抗压强度提高,下降段坡度增大,混凝土梁的承载能力提高,模拟结果与相关试验结果吻合较好;该混凝土损伤塑性模型可以模拟混凝土材料和构件的主要动力特性,但也存在不足之处。
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| 关 键 词： | 混凝土 钢筋混凝土梁 损伤塑性模型 加载速度 应变率 |
Investigation into Dynamic Properties of Damaged Plasticity Model for Concrete in ABAQUS |
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| LI Min,LI Hong-nan.Investigation into Dynamic Properties of Damaged Plasticity Model for Concrete in ABAQUS[J].Journal of Seismology,2011(3):299-303. |
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| Authors: | LI Min LI Hong-nan |
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| Institution: | (Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | Concrete structure possibly suffers severe earthquake ground motions in its active service.The strain rate of concrete at critical sections may be as high as 10~（-1）/s.Mechanical and deformative behavior of concrete at higher strain rate will be different from which at static loading.Rate-dependent constitutive model of structural material should be used in the analysis of earthquake-resistant reinforced concrete structure.To evaluate the capacity of damaged plasticity model for concrete in the finite element software ABAQUS simulating the dynamic properties of concrete,the constitutive model is adopted to simulate the mechanical properties of concrete material and members subjected to monotonic loading at different loading rates that might be experienced during earthquakes.It is shown that,as the loading rate increases,the compressive strength and the slope of the descending portion of the stress-strain curve for concrete increase, the loading capability of reinforced concrete beam also increases.The simulation results agree well with the test results.The model can simulate the mainly dynamic properties of concrete,but there are still some problems. |
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| Keywords: | concrete reinforced concrete beam damaged plasticity model loading rate strain rate |
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