Influence of Reinforcement Ratio on Concrete Fracture Parameters

沈培锋

doi:10.13409/j.cnki.jdpme.2013.02.021

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Influence of Reinforcement Ratio on Concrete Fracture Parameters

更新时间：2025-12-11

- Influence of Reinforcement Ratio on Concrete Fracture Parameters
- Vol. 33, Issue 2, Pages: 235-240(2013)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2013.02.021
  CLC： U528
- Published：2013
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[1]沈培锋.配筋率对混凝土断裂参数的影响[J].防灾减灾工程学报,2013,33(02):235-240.

沈培锋. Influence of Reinforcement Ratio on Concrete Fracture Parameters[J]. 2013, 33(2): 235-240.
[1]沈培锋.配筋率对混凝土断裂参数的影响[J].防灾减灾工程学报,2013,33(02):235-240. DOI： 10.13409/j.cnki.jdpme.2013.02.021.

沈培锋. Influence of Reinforcement Ratio on Concrete Fracture Parameters[J]. 2013, 33(2): 235-240. DOI： 10.13409/j.cnki.jdpme.2013.02.021.

摘要

为了研究配筋率对混凝土断裂韧度、有效裂缝长度等断裂参数的影响

以及钢筋在混凝土裂缝扩展过程中的限裂作用

通过理论分析和钢筋混凝土断裂破坏特征

建立了钢筋混凝土双K断裂判据

在此基础上

设计制作了3组12根不同配筋率的三点弯曲梁试件

测得每个荷载-裂缝张口位移曲线（P-CMOD）

研究了配筋率对钢筋混凝土3点弯曲梁试件断裂性能的影响。试验结果表明:钢筋混凝土试件的裂缝扩展过程也可以用双K断裂准则描述

起裂断裂韧度与配筋率无关

是材料的固有参数;失稳断裂韧度随配筋率的增大而逐渐增大;钢筋的存在还可以很好地抑制裂缝的扩展。

Abstract

In order to study the influence of the reinforcement ratio on fracture parameters such as the fracture toughness

the effective crack length and the effect of the reinforcing bar on crack propagation of concrete

through the theoretical analysis and fracture failure characteristics of reinforced concrete

the double-K fracture criterion of reinforced concrete was established

and on this basis

12 three-point bending specimens divided into 3 groups and with different reinforcement ratios were designed and constructed

the curves of load-crack mouth displacement（P-CMOD） were measured

The influence of the reinforcement ratios on fracture performance of reinforced concrete three point bending beam specimens were researched.The results show that crack propagation process of reinforced concrete can be described by double-K fracture criterion.The values of initiation fracture toughness is independent of reinforcement ratio and can be regarded as material constant.The unstable fracture toughness slowly increases with the increase of reinforcement ratio.Exsistence of the reinforcement may restrain faily the propagation of the crack.

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references

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少筋混凝土结构断裂数值模拟 [J]. 林延杰,魏显峰,齐永顺. 建筑施工 . 2007(01)

少筋混凝土梁三点弯曲断裂过程的数值模型 [J]. 魏显峰,段树金,齐永顺. 石家庄铁道学院学报 . 2006(04)

断裂力学方法分析钢筋混凝土的抗裂度 [J]. 曹祖同,陈云霞,秦怀泉. 天津大学学报 . 1992(04)

基于断裂力学的钢筋、FRP与混凝土界面力学特性研究 [D]. 杨树桐. 大连理工大学 2008

Minimum reinforcement in concrete structures and material/structural instability [J] . Giuseppe Ferro,Alberto Carpinteri,Giulio Ventura. International Journal of Fracture . 2007 (4)

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