高强钢筋混凝土梁疲劳抗弯刚度试验研究_《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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高强钢筋混凝土梁疲劳抗弯刚度试验研究

Experimental Study on the Flexural Rigidity of High-strength Reinforced Concrete Beams under Fatigue Loading

２０19年第2期

高强钢筋混凝土；抗弯疲劳试验；抗弯刚度；挠度增大系数

High strength reinforced concrete; Bending fatigue test; Flexural rigidity; Coefficient of deflection increases

２０19年第2期

10.19761/j.1000-4637.2019.02.040.04

河北省交通运输厅计划项目（Y-2012047）。

封喜波，司文静

1.河北省高速公路廊坊北三县管理处，065201；2.北华航天工业学院，廊坊 065000

封喜波，司文静

封喜波,司文静.高强钢筋混凝土梁疲劳抗弯刚度试验研究[J].混凝土与水泥制品,2019(2):40-43.

FENG X B,SI W J.Experimental Study on the Flexural Rigidity of High-strength Reinforced Concrete Beams under Fatigue Loading[J].China Concrete and Cement Products,2019(2):40-43.

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摘要：通过对8根高强钢筋混凝土梁进行抗弯静载试验和疲劳试验，探究了钢筋强度等级、混凝土强度等级及配筋率对高强钢筋混凝土梁疲劳抗弯刚度的影响，分析了疲劳试验过程中高强钢筋混凝土梁挠度的变化规律。试验结果表明，钢筋强度等级对梁的疲劳抗弯刚度影响不明显，配筋率是影响疲劳抗弯刚度的重要因素，提高混凝土、钢筋等级及配筋率可显著提高梁的疲劳抗弯刚度。重复荷载作用200万次后，梁的承载力有所下降，下降幅度小于5%，荷载作用过程中，梁的挠度得到了充分发展。 Abstract： Based on the static and fatigue bending tests of 8 high strength reinforced concrete beams, the influence of the strength grade of steel bar and the ratio of reinforcement on the bending rigidity of the high-strength reinforced concrete beams was studied. The development law of high-strength reinforced concrete beams during the process of fatigue loading was analyzed. The result shows that the steel strength grade has little effect on the flexural stiffness of beams, the ratio of reinforcement is an important factor to affect the bending fatigue stiffness, and increasing the ratio of concrete, steel grade as well as reinforcement ratio can significantly improve the bending stiffness of beam. After the number of the repeated load reaches 2 million times, the bearing capacity of beams drops less than 5%. In the process of loading, the deflection of beams can fully develop.

英文名 : Experimental Study on the Flexural Rigidity of High-strength Reinforced Concrete Beams under Fatigue Loading

刊期 : ２０19年第2期

关键词 : 高强钢筋混凝土；抗弯疲劳试验；抗弯刚度；挠度增大系数

Key words : High strength reinforced concrete; Bending fatigue test; Flexural rigidity; Coefficient of deflection increases

刊期 : ２０19年第2期

DOI : 10.19761/j.1000-4637.2019.02.040.04

文章编号 :

基金项目 : 河北省交通运输厅计划项目（Y-2012047）。

作者 : 封喜波，司文静

单位 : 1.河北省高速公路廊坊北三县管理处，065201；2.北华航天工业学院，廊坊 065000

封喜波，司文静

封喜波,司文静.高强钢筋混凝土梁疲劳抗弯刚度试验研究[J].混凝土与水泥制品,2019(2):40-43.

FENG X B,SI W J.Experimental Study on the Flexural Rigidity of High-strength Reinforced Concrete Beams under Fatigue Loading[J].China Concrete and Cement Products,2019(2):40-43.

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摘要

参数

结论

参考文献

引用本文

摘要：通过对8根高强钢筋混凝土梁进行抗弯静载试验和疲劳试验，探究了钢筋强度等级、混凝土强度等级及配筋率对高强钢筋混凝土梁疲劳抗弯刚度的影响，分析了疲劳试验过程中高强钢筋混凝土梁挠度的变化规律。试验结果表明，钢筋强度等级对梁的疲劳抗弯刚度影响不明显，配筋率是影响疲劳抗弯刚度的重要因素，提高混凝土、钢筋等级及配筋率可显著提高梁的疲劳抗弯刚度。重复荷载作用200万次后，梁的承载力有所下降，下降幅度小于5%，荷载作用过程中，梁的挠度得到了充分发展。

Abstract： Based on the static and fatigue bending tests of 8 high strength reinforced concrete beams, the influence of the strength grade of steel bar and the ratio of reinforcement on the bending rigidity of the high-strength reinforced concrete beams was studied. The development law of high-strength reinforced concrete beams during the process of fatigue loading was analyzed. The result shows that the steel strength grade has little effect on the flexural stiffness of beams, the ratio of reinforcement is an important factor to affect the bending fatigue stiffness, and increasing the ratio of concrete, steel grade as well as reinforcement ratio can significantly improve the bending stiffness of beam. After the number of the repeated load reaches 2 million times, the bearing capacity of beams drops less than 5%. In the process of loading, the deflection of beams can fully develop.

关键词:

高强钢筋混凝土；抗弯疲劳试验；抗弯刚度；挠度增大系数

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