Bonding behavior of lap-spliced reinforcing bars embedded in ultra-high-performance concrete with steel fibers

被引：3

作者：

Aiamsri, Krairerk ^{[1
]}

Yaowarat, Teerasak ^{[1
,2
,7
]}

Horpibulsuk, Suksun ^{[1
,2
,3
,6
,7
]}

Suddeepong, Apichat ^{[1
,4
]}

Buritatum, Apinun ^{[1
,2
,7
]}

Hiranwatthana, Kanchana ^{[1
]}

Nitichote, Kirati ^{[5
]}

机构：

[1] Suranaree Univ Technol, Ctr Excellence Innovat Sustainable Infrastruct Dev, Nakhon Ratchasima 30000, Thailand

[2] Suranaree Univ Technol, Undergraduate Program Civil & Infrastructure Engn, Nakhon Ratchasima 30000, Thailand

[3] Acad Sci, Royal Soc Thailand, Bangkok 10300, Thailand

[4] Suranaree Univ Technol, Inst Res & Dev, Nakhon Ratchasima 30000, Thailand

[5] Concrete Prod & Aggregate Co Ltd, Bangkok 10800, Thailand

[6] Suranaree Univ Technol, Sch Civil Engn, Nakhon Ratchasima 30000, Thailand

[7] Suranaree Univ Technol, Inst Engn, Nakhon Ratchasima 30000, Thailand

来源：

DEVELOPMENTS IN THE BUILT ENVIRONMENT | 2024年 / 20卷

关键词：

Ultra-high performance concrete (UHPC); Bond strength; Pull-out tests; Lap-splice tests; HIGH-STRENGTH CONCRETE; FLEXURAL BEHAVIOR; BEAMS; DUCTILITY; COLUMNS; REBAR; UHPC;

D O I：

10.1016/j.dibe.2024.100585

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study explores the bond strength of steel reinforcing bars in normal concrete (NC) and ultra-highperformance concrete (UHPC) with steel fibers, focusing on the behavior of lap-spliced rebars. Key variables such as rebar diameter (D), spacing (s), lap-splice length (L1), and hook length (L2) were evaluated to understand their impact on bond performance. Both NC and UHPC increase in bond strength with greater spacing and lapsplice length, with UHPC demonstrating significantly stronger bond characteristics due to its higher compressive strength. A novel predictive method for calculating bond strength is proposed, offering practical guidance for designing lap-spliced rebars in construction, and includes reduction factors tailored for realistic construction settings. This method achieves an error margin below +/- 16.5%, providing an accurate approach for practitioners. This rational method incorporates both engineering and economic considerations, particularly valuable for applications in precast concrete structures where enhanced bond performance and durability are essential.

引用

页数：13

共 54 条

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