新欧洲规范2附录L中钢纤维混凝土的抗压性能

IF 0.1 Q4 ENGINEERING, CIVIL Hormigon y Acero Pub Date : 2022-12-08 DOI:10.33586/hya.2022.3092
G. Ruiz, Á. De La Rosa, E. Poveda, R. Zanon, M. Schäfer, S. Wolf
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引用次数: 7

摘要

本文描述了在CEN TC250/SC2/WG1/TG2 -纤维增强混凝土中开发的新欧洲规范2(版本2022-05,EC2)附录L中钢纤维增强混凝土(SFRC)的压应力-应变行为模型。该模型使用的函数来自于一个广泛的数据库的相关性,该数据库由197个记录良好的SFRC压缩试验和484个弯曲试验组成。我们在附录l中详细解释了该模型,并推导了SFRC ULS的抛物线矩形模型的应变值。此外,我们还使用该模型以及与数据库的相关性来提供EC2中压缩和弯曲性能等级之间的联系,从而可以对任何特定的SFRC进行完整的定义。同样,我们推导出每个弯曲性能等级的抛物线矩形应变值,这主要有利于较强的弯曲等级。最后给出了一个实例,表明采用新模型的钢-钢-钢复合结构截面的强度和延性分别提高了15%和100%。
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Compressive behavior of steel-fiber reinforced concrete in Annex L of new Eurocode 2
This paper describes the model for the compressive stress-strain behavior of steel fiber-reinforced concrete (SFRC) in Annex L of the new Eurocode 2 (version 2022-05, EC2), developed within CEN TC250/SC2/WG1/TG2 – Fiber reinforced concrete. The model uses functions obtained from correlations with an extensive database comprised of 197 well-documented SFRC compressive tests and 484 flexural tests. We detailedly explain the model and derive the strain values for the parabola-rectangle model for ULS of SFRC in Annex L. In addition, we also use the model and the correlations with the database to provide a link between the compressive and the flexural performance classes in EC2, which allows a complete definition of any particular SFRC. Likewise, we derive parabola-rectangle strain values for each flexural performance class, which is mainly advantageous for the stronger flexural classes. Finally, we give an example showing the enhancement in strength and ductility of a composite steel-SFRC section endorsed with the new model, which results of 15% and 100%, respectively.
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来源期刊
Hormigon y Acero
Hormigon y Acero ENGINEERING, CIVIL-
CiteScore
0.50
自引率
0.00%
发文量
4
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