Full Text:   <2426>

Summary:  <1711>

CLC number: TH161.12

On-line Access: 2016-05-04

Received: 2015-11-04

Revision Accepted: 2016-02-26

Crosschecked: 2016-04-07

Cited: 1

Clicked: 3334

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Dong-ming Yan

http://orcid.org/0000-0003-2522-3342

Gen-da Chen

http://orcid.org/0000-0002-0658-4356

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Journal of Zhejiang University SCIENCE A 2016 Vol.17 No.5 P.366-377

http://doi.org/10.1631/jzus.A1500301


Static and dynamic behavior of concrete slabs reinforced with chemically reactive enamel-coated steel bars and fibers


Author(s):  Dong-ming Yan, Shi-kun Chen, Gen-da Chen, Jason Baird

Affiliation(s):  School of Civil and Architectural Engineering, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   gdchen@zju.edu.cn

Key Words:  Chemically reactive enamel (CRE) coating, Blast load, Fracture pattern, Steel fibers


Dong-ming Yan, Shi-kun Chen, Gen-da Chen, Jason Baird. Static and dynamic behavior of concrete slabs reinforced with chemically reactive enamel-coated steel bars and fibers[J]. Journal of Zhejiang University Science A, 2016, 17(5): 366-377.

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author="Dong-ming Yan, Shi-kun Chen, Gen-da Chen, Jason Baird",
journal="Journal of Zhejiang University Science A",
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pages="366-377",
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%T Static and dynamic behavior of concrete slabs reinforced with chemically reactive enamel-coated steel bars and fibers
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T1 - Static and dynamic behavior of concrete slabs reinforced with chemically reactive enamel-coated steel bars and fibers
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DOI - 10.1631/jzus.A1500301


Abstract: 
In this study, the effect of steel fibers coated with chemically reactive enamel (CRE) on the system response of concrete structures with reinforcing bars has been investigated for the first time. In particular, the ultimate strength, ductility, and failure mechanism of 24 reinforced concrete slabs were experimentally characterized under static and blast loads. CRE coating applied on steel bars reduced the crater area of slabs under blast loads by up to 20%; it slightly increased the strength of slabs and significantly reduced the strength degradation of slabs when increasingly deflected under static loads, making the slabs more ductile. CRE coating applied on steel fibers increased the strength of slabs by up to 16% under static loads. The influence of CRE coating applied on both steel fibers and bars may be taken into account by introducing a coating factor in the range of 0.57<β<1.0 in the American Concrete Institute (ACI) development length equation.

The manuscript aims at analyzing the effect of CRE coating on the static and dynamic behavior of concrete. The novelty of this paper resides in the dynamic experimental study of RC under blast tests and on the study of CRE coated steel fibers. The study reports an increase of the mechanical properties of samples where the coating is used, as well as a higher blast resistance.

活性瓷釉涂层钢筋及钢纤维增强混凝土板动、静力学特性研究

目的:活性瓷釉涂层能够显著增强钢筋的防腐蚀能力,同时明显提升钢筋与混凝土的粘结力。通过对活性瓷釉涂层钢筋以及钢纤维增强混凝土板在动、静力荷载作用下的承载力、变形特性以及破坏特征的研究,为活性瓷釉涂层技术在钢筋混凝土结构中的应用奠定理论基础。
创新点:1. 对活性瓷釉涂层钢筋混凝土板的动、静力学性能进行系统研究;2. 探究活性瓷釉钢纤维在混凝土结构中的作用机理。
方法: 1. 通过对活性瓷釉涂层钢筋混凝土板进行爆炸实验(图3),揭示活性瓷釉涂层钢筋混凝土结构的动力破坏特征(图5和6);2. 通过对活性瓷釉涂层钢筋混凝土板进行静力实验(图4),研究在"点"荷载和"线"荷载作用下混凝土板的力学性能;3. 通过分析钢纤维在钢筋混凝土结构中的传力机理,提出活性瓷釉涂层钢纤维在钢筋混凝土结构中的设计方法(图13)。
结论:1. 活性瓷釉涂层能够显著改善钢筋在混凝土结构中的传力性能;在动力荷载作用下,涂层钢筋混凝土结构的破坏程度明显减轻。2. 活性瓷釉涂层能够显著改善钢筋混凝土结构的变形特性,大大增强其耗能能力。3. 采用活性瓷釉涂层的钢纤维,其纤维长度可适当减小。

关键词:活性瓷釉涂层;爆炸荷载;破坏特征;钢纤维

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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