UHPC菱形条形节点抗弯抗剪性能研究

IF 3.6 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Concrete Structures and Materials Pub Date : 2023-11-03 DOI:10.1186/s40069-023-00642-z

Shuwen Deng, Banfu Yan, Lian Shen, Mingxin Qin, Yina Jia

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引用次数: 0

摘要

摘要桥梁加速施工(ABC)在现代社会的桥梁建设中具有许多优势。而对于ABC来说，后浇接头一直是最薄弱也是最关键的部分。提出了一种适用于ABC的超高性能混凝土菱形-条形接头。进行了多次模型试验，验证了其抗弯、抗剪性能。首先，进行了大型模型试验，验证了其抗弯性能。结果表明:致密化和焊接连接界面钢筋能显著提高旋转导向连接梁的极限承载力和基于耐久性的开裂应力，其极限承载力可达到完整梁的90%;然后进行了抗剪试验。结果表明:超高混凝土旋转导向组合梁具有优异的弯剪力学性能和较好的延性。最后，给出了极限抗弯承载力和抗剪承载力的计算方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Study on Flexural and Shear Behavior of UHPC Rhombus-Strip-Shaped Joint

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Study on Flexural and Shear Behavior of UHPC Rhombus-Strip-Shaped Joint

Abstract Accelerated bridge construction (ABC) has many advantages for bridge construction in modern society. While for ABC, the post-cast joint is always the weakest and most critical part. This paper presents a UHPC rhombus-strip-shaped (RSS) joint suitable for ABC. Several model tests were carried out to verify its resistance to flexural and shear. First, large-scale model tests are advanced to confirm its flexural properties. The results show that densified and welded joint interface rebars can significantly improve the ultimate bearing capacity and durability-based cracking stress of the RSS joint beams, and the ultimate bearing capacity can reach 90% of the complete beam. Then the shear-resistance tests were carried out. The results show that the UHPC RSS joint beam has excellent bending-shear mechanical properties and better ductility. Lastly, the ultimate flexural bearing capacity and shear-resistance capacity calculation methods were obtained.

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来源期刊

International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

6.30

自引率

5.90%

发文量

审稿时长

13 weeks

期刊介绍： The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.