高强及超高强混凝土的脆性与强度尺寸效应

黄煜镔; 钱觉时

doi:10.13204/j.gyjz200501004

高强及超高强混凝土的脆性与强度尺寸效应

doi: 10.13204/j.gyjz200501004

黄煜镔¹,
钱觉时²

1.
1. 重庆大学,土木工程学院,重庆,400045;
2.
2. 重庆大学B区,材料学院,重庆,400045

基金项目:

国家自然科学基金资助项目(申请号:59778053)

详细信息

作者简介:
黄煜镔男 1974年2月出生博士后

中图分类号: TU528
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- 文章访问数: 108
- HTML全文浏览量: 22
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- 被引次数: 0
出版历程
- 收稿日期: 2004-07-22
- 刊出日期: 2005-01-20

BRITTLENESS AND STRENGTH SIZE EFFECT OF HIGH AND SUPER HIGH STRE NGTH CONCRETES

Huang Yubin¹,
Qian Jueshi²

1.
1. Institute of Civil Engineering,Chongqing University Chongqing 400045;
2.
2. Institute of Materials,Area B of Chongqing University Chongqing 40 0045

摘要

摘要: 以往的高强混凝土研究往往局限于试验室尺度上的强度提高,而实际上,由于强度尺寸效应现象的存在,并且随混凝土强度提高,脆性增大,强度尺寸效应现象更为明显,因此许多研究是不完善的。采用Bazant的尺寸效应律对高强、超高强混凝土的强度尺寸效应进行了研究,结果表明,随混凝土强度提高,强度随试件尺寸增大而降低的趋势有所突出,并由此探讨了脆性与强度尺寸效应研究的意义。
- 高强及超高强混凝土 /
- 强度 /
- 脆性 /
- 尺寸效应 /
- Bazant尺寸效应律
Abstract: The previous study on high streng th concrete often only devoted to improvement on strength in laboratory.On one hand there does exist strength size effect,on the other hand the brittleness is increased with an increase in strength of concrete,and the phenomenon more pr evalently.So the availability of these studies became suspect.In this paper,base d on size effect law suggested by Bazant,the high strength and super high streng th concrete is studied.It is shown that with the improvement of strength of conc rete the trend that strength of concrete decreases quickly with scale increasing is more pronounced.Furthermore meaning of the study connecting brittleness with size effect is discussed.
- high and super high strength concrete /
- strength /
- brittleness /
- size effect /
- size effect law

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参考文献(4)

Bazant Z P,Kazemi M T.Determination of Fracture Energy,Proce ss Zone Length and Brittleness Number from Size Effect with Application to Rock and Concrete.International Journal of Fracture,1990,44(2):111～131

[2] RILEM Committee on Fracture Mechanics of Concrete-Test Methods.Size-Effect Method for Determining Fracture Energy and Process Zone Size of Concrete.Materia ls and Structures,1990,23(138):461～465

[3] Ben I G Barr,Hadi F Abusiaf,Siddik Sener.Size Effect and Fracture Energy Stud ies Using Compact Compression Specimens.Materials and Structures,1998,33(1):36～ 41

[4] 钱觉时,罗晖,王智.水泥混凝土高强化与强度尺寸效应.建筑材料学报,1998(2): 134～138

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