钢筋与超高性能混凝土粘结特性的理论分析

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Magazine of Concrete Research Pub Date : 2023-04-12 DOI:10.1680/jmacr.22.00291

Aoxiang Hu, Jing Du

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引用次数: 0

摘要

为了研究超高性能混凝土(UHPC)中预埋钢筋的粘结与锚固特性，采用Tepfer厚壁筒理论和弹性力学理论，分别建立了劈裂破坏和拔出破坏条件下变形钢筋与UHPC粘结强度的理论计算模型。然后用大量文献中的测试数据和作者进行的实验对所提出的计算模型进行验证。最后，采用中心点法、验算点法和普通混凝土结构设计规范对UHPC中变形钢筋的锚固长度进行了计算，并根据锚固可靠度理论给出了锚固长度的推荐值。研究结果可为工程设计人员提供设计依据，也为超高性能混凝土材料的推广应用提供有益的指导。

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Theoretical analysis on bond characteristics between steel bars and ultra-high performance concrete

In order to investigate the bond and anchorage characteristics of steel bars embedded in Ultra-High Performance Concrete (UHPC), Tepfer thick-walled cylinder theory and elastic mechanics theory were used to establish the theoretical calculation model of bond strength between deformed steel bars and UHPC under the conditions of splitting failure and pull-out failure, respectively. Then the proposed calculation model is verified with a large number of test data from the literature and experiments conducted by the author. Finally, the anchorage length of deformed steel bars in UHPC is calculated by Central Point method, Checking Point method and the design specification of normal concrete structure, and the recommended values of anchorage length are given based on anchorage reliability theory. The research results can provide design basis for engineering designers, and are also a useful guideline for the popularization and application of UHPC materials.

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来源期刊

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.