增强混凝土结构断裂力学特性研究-《混凝土与水泥制品》杂志社

网站首页杂志简介主要栏目欢迎订阅编委会投稿须知广告合作联系我们查重系统

增强混凝土结构断裂力学特性研究

Research on Fracture Properties of Reinforced Concrete Structure

浏览量:

关键词：

FRP；钢筋；纤维；超高韧性水泥基复合材料；增强混凝土结构；断裂

Key words：

FRP; Reinforcing Bar; Fiber; UHTCC; Reinforced concrete structural; Fracture

刊期：

２０18 Ｎｏ.4

DOI：

文章编号：

1000-4637（2018）04-18-04

基金项目：

国家自然科学基金项目（51679150、51579153、51409162）；国家重大科研仪器研制项目（51527811）南京水利科学研究院院基金项目（Y417002、Y417015）。

作者：

范向前，刘决丁，胡少伟，陆俊

单位：

南京水利科学研究院水文水资源与水利工程科学国家重点实验室，210029

摘要

摘要：有效提高混凝土结构的极限承载力、延长混凝土结构的破坏过程是工程界一直关注的重点问题。本文总结分析了FRP增强混凝土、钢筋增强混凝土、纤维增强混凝土以及超高韧性水泥基复合材料增强混凝土的断裂性能。结果表明：FRP、钢筋、纤维、UHTCC四种增强混凝土结构对其起裂荷载的改变相对较小，但均能有效改善结构极限承载力，延长结构失稳破坏过程，提高结构的安全性。

Abstract: Effectively improving the ultimate bearing capacity and extending the destruction process of concrete structure is an important issue that draws great attention. The fracture performance of FRP reinforced concrete, steel reinforced concrete, fiber reinforced concrete, and UHTCC reinforced concrete are summarized and analyzed. The results show that the crack propagating loads of four reinforced concrete structure are changed little relatively, the ultimate bearing capacity can be improved effectively, the failure process can be extended, and the structural safety be improved.

结论

（1）FRP增强混凝土结构能明显提高其极限承载力和延性，延缓裂缝扩展过程；FRP增强混凝土结构断裂破坏过程中存在3个临界点。

（2）钢筋增强混凝土结构断裂过程包括裂缝起裂、稳定扩展和失稳破坏3个阶段；钢筋是加入使得混凝土在失稳破坏前的裂缝长度有所增长。

（3）纤维增强混凝土结构的断裂能较普通混凝土有明显提高；纤维类型对纤维增强混凝土的断裂性能具有显著影响。

（4）UHTCC增强混凝土结构可以显著延长混凝土的失稳破坏过程，提高结构的安全性。

参考文献

[1] 朱万成,张娟霞,唐春安.FRP加固混凝土构件中裂纹扩展规律的数值模拟[J].建筑材料学报,2007,10(1):83-88.

[2] Bruno D.,Greco F.,Lonetti P..A fracture-ALE formulation to predict dynamic debonding in FRP strengthened concrete beams[J].Composites: Part B,2013,46(1)46-60.

[3] 肖建庄,王平,朱伯龙.我国钢筋混凝土材料抗火性能研究回顾与分析[J].建筑材料学报,2003(2):182-189.

[4] I. Iskhakov,Y. Ribakov.Exact solution of shear problem for inclined cracked bending reinforced concrete elements[J]. Materials and Design,2014,57(5):472-478.

[5] 程云虹,王宏伟,王元.纤维增强混凝土抗碳化性能的初步研究[J].建筑材料学报,2010(6):792-795.

[6] 王占桥,高丹盈,朱海堂,等.聚丙烯纤维高强混凝土的断裂性能[J].硅酸盐学报,2007,35(10):1347-1352.

[7] WANG Nan,XU Shi-lang.Flexural response of reinforced concrete beams strengthened with post-poured ultra high toughness cementitious composites layer[J].Journal of Central South University of Technology,2011,18(3):932-939.

[8] Tuakta C.,Büyük ztürk O.Deterioration of FRP/concrete bond system under variable moisture conditions quantified by fracture mechanics[J].Composites:Part B,2011,42:145-154.

[9] M. ElBatanouny,A. Larosche,P. Mazzoleni,et al.Identification of Cracking Mechanisms in Scaled FRP Reinforced Concrete Beams using Acoustic Emission[J].Experimental Mechanics, 2014,54(1):69-82.

[10] Yi Fu-min,Dong Wei,Zhao Yau-hua, i, et al.Fracture characteristics and ductility of cracked concrete beam post-strengthened with CFRP Sheet[J].Journal of Harbin Institute of Technology (New Series),2011,18(3):5-10.

[11] 王利民,卢俊杰,刘灿昌,等.炭纤维强化板及其加固混凝土梁的力学性能[J].复合材料学报,2008,25(3):160-167.

[12] 易富民,董伟,吴智敏.CFRP 加固混凝土梁断裂特性的试验研究[J].水力发电学报,2008,28(6):193-199.

[13] 胡少伟,米正祥.标准钢筋混凝土三点弯曲梁双K断裂特性试验研究[J].建筑结构学报,2013,34(3):152-157.

[14] Xiangqian Fan,Shaowei Hu. Influence of crack initiation length on fracture behaviors of reinforced concrete[J].Applied Clay Science,2013,79(6):25-29.

[15] Y. Zhu, S. L. Xu. The influence of reinforcing bar on crack extension of concrete[C].Proceedings of FraMCoS-7, 7th International Conference on Fracture Mechanics of Concrete and Concrete Structures,2010:345-350.

[16] 朱榆.混凝土断裂及阻裂理论的研究[D].大连:大连理工大学,2009.

[17] RAMADOSS P,NAGAMANI K．Tensile strength & durability characteristics of high performance fiber reinforced concrete[J]. The Arabian Journal for Science and Engineering,2008,33(2):577-582．

[18] 王新友.钢纤维混凝土的断裂模型研究[J].广西水利水电,1992(3):2-7.

[19] 关丽秋,赵国藩.钢纤维混凝土在单向拉伸时的增强机理与破坏形态的分析[J].水利学报,1986(9):34-43.

[20] GAO Danying,ZHANG Tingyi.Fracture characteristics of steel fiber reinforced high strength concrete under three-point bending[J]. Journal of the Chinese Ceramic Society,2007,35(12):1630-1635.

[21] Petresson P E.Fracture energy of concrete cement[J]. Concrete Research,1980(10):78-101.

[22] M. Elser, E.K. Tschegg, N. Finger, S.E, et a1. Fracture behavior of polypropylene Fiber Reinforced concrete: Modeling and computer simulation[J]. Composites Science and Technology,1996,56(8):947-956.

[23] A．Jansson,I．Lǒfgren, K．Gylltoft.Flexural behaviour of members with a combination of steel fibres and conventional reinfor cement[J].Nordic Concrete Research,2010,42(2):155-171.

[24] 高丹盈,张廷毅.三点弯曲下的钢纤维高强混凝土断裂能[J].水利学报,2007,38(9):1115-1120.

[25] Kamil Hodicky, Thomas Hulin, Jacob W., et al. Wedge Splitting Test and Inverse Analysis on Fracture Behaviour of Fiber Reinforced and Regular High Performance Concretes[J].Journal of Civil Engineering and Architecture,2014,8(5):595-603.

[26] 朱海堂,高丹盈,王占桥.混杂纤维高强混凝土断裂性能试验研究[J].建筑结构学报,2010,31(1):41-46.

[27] 徐世烺,李贺东.超高韧性水泥基复合材料研究进展及其工程应用[J].土木工程学报,2008,41(6):45-60.

[28] Li-jun Hou,Shi-lang Xu,Xiu-fang Zhang.Toughness evaluation of ultra-high toughness cementitious composite specimens with different depths[J].Magazine of Concrete Research,2012,64(12):1079-1088.

[29] 范兴朗,潘剑云,吴熙,等.UHTCC 加固混凝土梁断裂行为分析[J].水利水电科技进展,2014,34(1):53-56.

[30] 朱榆,徐世烺.超高韧性水泥基复合材料加固混凝土三点弯曲梁断裂过程的研究[J].工程力学,2011,28(3):69-77.

[31] Xu Shilang, Reinhardt H W．Crack extension resistance and fracture properties of quasi-brittle softening material like concrete based on the complete process of fracture[J]. International Journal of Fracture,1998,92(1):71-99．

[32] Li-jun Hou,Shilang Xu,Xiu-fang Zhang,et al.Shear behaviors of reinforced ultrahigh toughness cementitious composite slender beams with stirrups[J].Journal of Materials in Civil Engineering,2014,26(3):466-475.

引用本文

范向前,刘决丁,胡少伟,等.增强混凝土结构断裂力学特性研究[J].混凝土与水泥制品,2018(4):18-21.

FAN X Q,LIU J D,HU S W,et al.Research on Fracture Properties of Reinforced Concrete Structure[J].China Concrete and Cement Products,2018(4):18-21.

上一个：通用硅酸盐水泥性能的分形研究

下一个：垃圾焚烧灰高温重构矿渣水泥复合体系安全应用研究