二级配凸多边形骨料随机分布混凝土动态特性
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摘要
骨料是混凝土重要组成部分,对混凝土力学性能有很大影响。利用有限元软件ANSYS/LS-DYNA,对二级配凸多边形骨料随机分布混凝土动态特性进行数值模拟,分析凸多边形粗骨料体积含量、粒径大小和试件尺寸对二级配混凝土动态特性的影响规律。结果表明:二级配凸多边形骨料随机分布混凝土表现出率敏感性和尺寸效应;二级配混凝土承载能力随粗骨料最大粒径的增大而降低;随着粗骨料中间粒径和粗骨料体积含量增大,二级配混凝土承载能力呈先增大后降低趋势;随粗骨料最小粒径的增大,二级配混凝土承载能力逐渐降低。
Coarse aggregate is an important part of concrete and has great influence on the mechanical properties of concrete.Using finite element software ANSYS/LS-DYNA,the dynamic mechanical properties of two-gradation concrete with random polygonal coarse aggregate were simulated.The effect of volume content,diameter of polygonal coarse aggregate and specimen size on the dynamic mechanical behavior of two-gradation concrete was analyzed.Simulated results showed that two-gradation concrete was rate-dependent and had size-effect.With the growth in the maximum diameter of polygonal coarse aggregate,the bearing capacity of two-gradation concrete declines.The bearing capacity of two-gradation concrete increased first,and then decreased with the middle diameter and volume content of polygonal coarse aggregate.With the increase of the minimum diameter,the bearing capacity of two-gradation concrete declined.
Coarse aggregate is an important part of concrete and has great influence on the mechanical properties of concrete.Using finite element software ANSYS/LS-DYNA,the dynamic mechanical properties of two-gradation concrete with random polygonal coarse aggregate were simulated.The effect of volume content,diameter of polygonal coarse aggregate and specimen size on the dynamic mechanical behavior of two-gradation concrete was analyzed.Simulated results showed that two-gradation concrete was rate-dependent and had size-effect.With the growth in the maximum diameter of polygonal coarse aggregate,the bearing capacity of two-gradation concrete declines.The bearing capacity of two-gradation concrete increased first,and then decreased with the middle diameter and volume content of polygonal coarse aggregate.With the increase of the minimum diameter,the bearing capacity of two-gradation concrete declined.
引文
[1]刘海峰,韩莉.基于随机骨料模型混凝土动态性能数值模拟[J].应用力学学报,2017,34(1):162-168+204.
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[4]王亿颖,周姝航,刘海峰,等.动荷载下沙漠砂混凝土破坏过程数值模拟[J].混凝土,2016(10):69-71,76.
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[9]曹静,刘海峰.混凝土动态力学性能数值模拟研究[J].防灾减灾工程学报,2016,36(6):866-871,884.
[10]刘海峰,陈巧丽.二级配骨料随机分布混凝土动态特性数值模拟[J].科学技术与工程,2017,17(20):6-10.
[11]陈巧丽.二级配粗骨料随机分布混凝土动态力学性能数值模拟[D].银川:宁夏大学,2017.
[12]FULLER W B,THOMPSON S E.The laws of proportioning concrete[J].Journal of Transportation Division,1907,59(1):67-143.
[13]WALARAVEN J C,REINHARDT H W.Theory and experiments on the mechanical behavior of cracks in plain and reinforced concrete subjected to shear loading[J].Heron,1981,26(1A):26-35.
[14]叶先磊,史亚杰.ANSYS工程分析软件应用实例[M].北京:清华大学出版社,2003.
[15]马怀发,芈书贞,陈厚群.一种混凝土随机凸多边形骨料模型生成方法[J].中国水利水电科学研究院学报,2006,4(3):196-201
[16]巫绪涛,李耀,李和平.混凝土HJC本构模型参数的研究[J].应用力学学报,2010(2):340-344,443.
[17]HOLMQUIST T J,JOHNSON G R,CCOOK W H.A computational constitutive model for concrete subjected to large strains,high strain rates and high pressures[C].Proceedings of 14th International Symposium on Ballistics.Qubec,1993:591-600.
[18]LIU H F,NING J G.Constitutive model for concrete subjected to impact loading[J].Journal of Southeast University(English Edition),2012,28(1):79-84.
[2]刘海峰,韩莉.冲击荷载作用下混凝土动态力学性能数值模拟研究[J].固体力学学报,2015,36(2):145-153.
[3]韩莉.二维骨料随机分布混凝土动态力学性能数值模拟[D].银川:宁夏大学,2015.
[4]王亿颖,周姝航,刘海峰,等.动荷载下沙漠砂混凝土破坏过程数值模拟[J].混凝土,2016(10):69-71,76.
[5]韩莉,刘海峰.动荷载下水泥砂浆和混凝土破坏过程的数值模拟[J].四川建筑科学研究,2015,41(1):226-229.
[6]王亿颖.沙漠砂混凝土动态力学性能数值模拟研究[D].银川:宁夏大学,2016.
[7]曹静.混凝土与加筋混凝土动态力学性能数值模拟[D].银川:宁夏大学,2016.
[8]刘海峰,吴萍.具有不同界面相厚度的混凝土动态特性[J].高压物理学报,2017,31(3):249-260.
[9]曹静,刘海峰.混凝土动态力学性能数值模拟研究[J].防灾减灾工程学报,2016,36(6):866-871,884.
[10]刘海峰,陈巧丽.二级配骨料随机分布混凝土动态特性数值模拟[J].科学技术与工程,2017,17(20):6-10.
[11]陈巧丽.二级配粗骨料随机分布混凝土动态力学性能数值模拟[D].银川:宁夏大学,2017.
[12]FULLER W B,THOMPSON S E.The laws of proportioning concrete[J].Journal of Transportation Division,1907,59(1):67-143.
[13]WALARAVEN J C,REINHARDT H W.Theory and experiments on the mechanical behavior of cracks in plain and reinforced concrete subjected to shear loading[J].Heron,1981,26(1A):26-35.
[14]叶先磊,史亚杰.ANSYS工程分析软件应用实例[M].北京:清华大学出版社,2003.
[15]马怀发,芈书贞,陈厚群.一种混凝土随机凸多边形骨料模型生成方法[J].中国水利水电科学研究院学报,2006,4(3):196-201
[16]巫绪涛,李耀,李和平.混凝土HJC本构模型参数的研究[J].应用力学学报,2010(2):340-344,443.
[17]HOLMQUIST T J,JOHNSON G R,CCOOK W H.A computational constitutive model for concrete subjected to large strains,high strain rates and high pressures[C].Proceedings of 14th International Symposium on Ballistics.Qubec,1993:591-600.
[18]LIU H F,NING J G.Constitutive model for concrete subjected to impact loading[J].Journal of Southeast University(English Edition),2012,28(1):79-84.