[1]曹艳辉,贾俊峰.考虑屈曲行为的钢筋力学性能数值仿真分析[J].防灾科技学院学报,2017,19(02):9-16.
 Cao Yanhui,Jia Junfeng.Numerical Simulation Analysis of Reinforcement Bars Considering Buckling Behavior[J].JOURNAL OF INSTITUTE OF DISASTER PREVENTION,2017,19(02):9-16.
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考虑屈曲行为的钢筋力学性能数值仿真分析()
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《防灾科技学院学报》[ISSN:1673-8047/CN:13-1377/P]

卷:
第19卷
期数:
2017年02期
页码:
9-16
栏目:
目次
出版日期:
2017-06-30

文章信息/Info

Title:
Numerical Simulation Analysis of Reinforcement Bars Considering Buckling Behavior
作者:
曹艳辉贾俊峰
北京工业大学 建筑工程学院, 北京100124
Author(s):
Cao Yanhui Jia Junfeng
College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China
关键词:
钢筋屈曲长径比压缩性能循环性能数值仿真
Keywords:
buckling of reinforcement bar length-to-diameter ratio (L/D)compressing behavior cyclic behavior numerical simulation
分类号:
TU392.2
文献标志码:
A
摘要:
为评估考虑结构中纵筋受压屈曲形态的力学性能,采用ABAQUS有限元软件对长径比(L/D)不同的纵向钢筋在轴向压缩和循环荷载下强度和刚度的变化情况进行数值仿真,同时考虑加载历史和加载方式对钢筋力学性能的影响。结果表明,屈曲对纵向钢筋力学性能影响比较显著,纵向钢筋压缩性能取决于L/D,与钢筋屈服强度无关;钢筋在循环荷载作用下其力学性能受到加载历史、塑性变形、累积损伤以及L/D的影响,拉伸超过屈服应变后将导致钢筋压缩强度的损失,塑性变形和循环加载共同导致了钢筋累积损伤,钢筋屈曲行为造成了受压时钢筋强度和刚度的退化,并且随着L/D的增加钢筋强度和刚度退化越显著。
Abstract:
For the purpose of assessing mechanical performance of longitudinal reinforcement bars considering buckling behavior, the ABAQUS finite element software was used to simulate the change of strength and stiffness of longitudinal reinforcement bars with different length-to-diameter ratio (L/D) under axial compressing and cyclic loading. The effect of loading history and loading mode on the mechanical behavior of reinforcement bars was also taken into consideration. As the results show, the buckling behavior exerts a significant effect on the mechanical performance of longitudinal reinforcement bars, and the axial compressing behavior of longitudinal reinforcement bars is determined by the L/D parameter, rather than by the steel yield strength. Under cyclic loading, the mechanical performance of reinformcemant bars is influenced by loading history, plastic deformation, cumulative damage and L/D. The compressive strength loss of reinforcement bars would occur when the pre-tensile strain exceeds yielding strain. Plastic deformation and cyclic loading together result in cumulative damage of reinforcement bars. Buckling behavior of reinforcement bars leads to deterioration of the bars′ strength and stiffness, and the degree of the deterioration is proportionate to the increasing L/D parameter. This research is hoped to help evaluate the mechanical performance of reinforced concrete elements.

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备注/Memo

备注/Memo:
收稿日期:2017-01-21 基金项目:北京市教委科技计划项目(KM201510005020) 作者简介:曹艳辉(1990—),男,硕士研究生,主要从事桥梁抗震方面的研究。 通信作者:贾俊峰(1982—),男,博士,副教授,主要从事桥梁抗震方面的研究。
更新日期/Last Update: 1900-01-01