冲击荷载作用下钢筋混凝土梁力学特性_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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冲击荷载作用下钢筋混凝土梁力学特性

Numerical Study on Mechanical Properties of Reinforced Concrete Beams under Impact Loads

2020年1期 No.285 P73-77+91

RC梁；冲击荷载；力学特征；数值模拟；破坏形态

RC beam; Impact load; Mechanical property; Numerical simulation; Failure mode

2020年1期 No.285 P73-77+91

10.19761/j.1000-4637.2020.01.073.06

国家自然科学基金（51479036）

葛文慧

山西职业技术学院，太原 030006

葛文慧

葛文慧.冲击荷载作用下钢筋混凝土梁力学特性数值研究[J].混凝土与水泥制品,2020(1):73-77+91.

GE W H.Numerical Study on Mechanical Properties of Reinforced Concrete Beams under Impact Loads[J].China Concrete and Cement Products,2020(1):73-77+91.

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摘要：为研究RC梁在冲击荷载作用下的力学特性，以混凝土强度、纵筋与箍筋配筋率、冲击体的冲击速度以及RC梁的跨度为主要参数对RC梁在冲击作用下的力学性能进行了数值分析，通过与已有试验结果对数值模型进行标定，获取了冲击力时程曲线、位移时程曲线以及破坏形态，验证了数值结果的正确性。分析结果表明，混凝土强度主要影响RC梁的破坏形态；纵筋配筋率对RC梁跨中位移影响较大；冲击体速度会同时对RC梁的破坏区域和跨中位移产生影响；RC梁跨度不仅会改变梁跨中位移也会改变梁的振动频率与反弹速度。
Abstract: In order to study the mechanical properties of RC beams subjected to impact loads, the mechanical properties of RC beams subjected to impact loads were numerically analyzed by taking concrete strength, ratio of longitudinal reinforcement to stirrup reinforcement, impact velocity of impact body and span of RC beams as main parameters. The numerical models were calibrated with the existing experimental results, and the impact force time history curve, displacement time history curve and breakage were obtained, and the correctness of the numerical results was verified. The results show that the concrete strength mainly affects the failure mode of RC beams. The reinforcement ratio of longitudinal bars has a great influence on the mid-span displacement of RC beams. The impact velocity also affect the damage area and mid-span displacement of RC beams. The span of RC beams can not only change the mid-span displacement of beams, but also change the vibration frequency and rebound speed of beams.

英文名 : Numerical Study on Mechanical Properties of Reinforced Concrete Beams under Impact Loads

刊期 : 2020年1期 No.285 P73-77+91

关键词 : RC梁；冲击荷载；力学特征；数值模拟；破坏形态

Key words : RC beam; Impact load; Mechanical property; Numerical simulation; Failure mode

刊期 : 2020年1期 No.285 P73-77+91

DOI : 10.19761/j.1000-4637.2020.01.073.06

文章编号 :

基金项目 : 国家自然科学基金（51479036）

作者 : 葛文慧

单位 : 山西职业技术学院，太原 030006

葛文慧

葛文慧.冲击荷载作用下钢筋混凝土梁力学特性数值研究[J].混凝土与水泥制品,2020(1):73-77+91.

GE W H.Numerical Study on Mechanical Properties of Reinforced Concrete Beams under Impact Loads[J].China Concrete and Cement Products,2020(1):73-77+91.

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摘要

参数

结论

参考文献

引用本文

摘要：为研究RC梁在冲击荷载作用下的力学特性，以混凝土强度、纵筋与箍筋配筋率、冲击体的冲击速度以及RC梁的跨度为主要参数对RC梁在冲击作用下的力学性能进行了数值分析，通过与已有试验结果对数值模型进行标定，获取了冲击力时程曲线、位移时程曲线以及破坏形态，验证了数值结果的正确性。分析结果表明，混凝土强度主要影响RC梁的破坏形态；纵筋配筋率对RC梁跨中位移影响较大；冲击体速度会同时对RC梁的破坏区域和跨中位移产生影响；RC梁跨度不仅会改变梁跨中位移也会改变梁的振动频率与反弹速度。

Abstract: In order to study the mechanical properties of RC beams subjected to impact loads, the mechanical properties of RC beams subjected to impact loads were numerically analyzed by taking concrete strength, ratio of longitudinal reinforcement to stirrup reinforcement, impact velocity of impact body and span of RC beams as main parameters. The numerical models were calibrated with the existing experimental results, and the impact force time history curve, displacement time history curve and breakage were obtained, and the correctness of the numerical results was verified. The results show that the concrete strength mainly affects the failure mode of RC beams. The reinforcement ratio of longitudinal bars has a great influence on the mid-span displacement of RC beams. The impact velocity also affect the damage area and mid-span displacement of RC beams. The span of RC beams can not only change the mid-span displacement of beams, but also change the vibration frequency and rebound speed of beams.

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