Research on the design method of flexural capacity of RC beams strengthen by ultra-high performance concrete

• Autorzy: Wang Jiawei , Ying Feifei

Identyfikatory

DOI

10.24425/ace.2024.148924

• Języki publikacji: EN

Abstrakty

EN

Due to the increase in traffic volume, load level, and service life of existing bridges, the bending bearing capacity of reinforced concrete beams (hereinafter referred to as RC beams) has decreased, leading to safety issues. In order to solve the problem of insufficient flexural bearing capacity of RC beams, this article adopts the method of ultra-high performance concrete (UHPC) flexural strengthening RC beams, establishes a finite element model of UHPC-RC reinforcement system, and conducts stress analysis with reinforcement thickness, reinforcement range, reinforcement form, and reinforcement height as parameters to determine the optimal scheme of the reinforcement system. Based on the calculation results, a theoretical formula for the maximum principal stress and maximum deflection of the reinforcement system is proposed. To verify the feasibility of the plan, a reinforcement design was carried out on an existing beam, and it was found that the bending bearing capacity of the RC beam increased by 21%; the high tensile strength of UHPC and the addition of steel fibers have a good limiting effect on cracks; The steel plate of the reinforcement system can be used as a template, reducing construction costs and having good economy.

Słowa kluczowe

EN

UHPC; reinforced concrete beams; RC beam bending reinforcement; bending bearing capacity; ultra high performance concrete; parameters analysis

PL

UHPC; nośność na zginanie; analiza parametrów; beton ultra-wysokiej wytrzymałości; wzmocnienie belki żelbetowej na zginanie; belka żelbetowa

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2024
• Tom: Vol. 70, nr 1
• Strony: 487--507
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Wang Jiawei

• Anhui Polytechnic University, School of Architecture and Civil Engineering, Wuhu City, Beijing Middle Road, China

• https://orcid.org/0000-0002-1263-3150

autor

Ying Feifei

• Anhui Polytechnic University, School of Architecture and Civil Engineering, Wuhu City, Beijing Middle Road, China

• https://orcid.org/0009-0002-9372-3832

Bibliografia

• [1] L. Chao and M. Rujie, “Application of Ultra High Performance Concrete Thin Layer Reinforcement Method in Channel Beam Bridges”, Bridge Construction, vol. 47, no. 5, 2017, doi: 10.3969/j.issn.1003-4722.2017.05.020
• [2] X. Xiuying and J. Ying, “Application Analysis of Ultra High Performance Fiber Reinforced Concrete in Highway Bridge Reinforcement”, Highway Engineering, vol. 45, no. 4, pp. 92–95, 2020, doi: 10.19782/j.cnki.1674-0610.2020.04.015
• [3] G. Qing and F. Xufeng, “Application of Thin Layer Reinforcement Technology of Ultra High Performance Concrete in Beam Bridge Construction”, TrafficWorld, vol. 2022, no. 9, pp. 29–30, 2022, doi: 10.16248/j.cnki.11-3723/u.2022.09.042
• [4] L. Zhongfu and Z. Xingquan, “Analysis on the Reinforcement Method of Increasing the Cross Section of Concrete”, Traffic Engineering and Technology for National Defence, vol. 2006, no. 4, pp. 68–70, 2006, doi: 10.3969/j.issn.1672-3953.2006.04.021.
• [5] Z. Jiwen and L. Zhitao, “Analysis of Bond Interface Stress in Beams Strengthened with Externally Bonded Carbon Fiber or Steel Plates”, Industry Building, vol. 2001, no. 6, pp. 1–4, 2001, doi: 10.3321/j.issn:1000-8993.2001.06.001.
• [6] L. Songhui and Z. Guopan, “Experimental Study on Strengthening Reinforced Concrete Pre cracked Beams with Carbon Fiber Cloth”, Civil Engineering Journal, vol. 2005, no. 10, pp. 92–96, 2005.
• [7] G. Rongxiong and W. Guoju, “Experimental study on the mechanical performance of RC beams strengthened with external prestressing”, China Journal of Highway and Transport, vol. 30, no. 10, pp. 69–80, 2017.
• [8] W. Gang and J. Jianbiao, “Experimental study on bending strengthening of reinforced concrete beams with prestressed high-strength steel wire ropes”, Civil Engineering Journal, vol. 2007, no. 12, pp. 17–27, 2007, doi: 10.3321/j.issn:1000-131x.2007.12.003
• [9] X. Lijuan and H. Huanan, “Analysis of Internal Forces before and after Simply Supported to Continuously Reinforced Old Bridges”, Low Temperature Building Technology, vol. 35, no. 8, pp. 67–69, 2013, doi: 10.3969/j.issn.1001-6864.2013.08.026
• [10] Z. Shaofeng, “Research on the Application of Ultra High Performance Concrete (UHPC) in Bridge Reinforcement”, Low Carbon World, vol. 180, no. 6, pp. 259–260, 2018, doi: 10.16844/j.cnki.cn10-1007/tk.2018.06.182
• [11] W. Jiawei, C. Bing, and H. Bo, “Stability monitoring method of UHPC spherical hinge horizontal rotation system”, Archives of Civil Engineering, vol. 68, no. 3, pp. 601–616, 2022, doi: 10.24425/ace.2022.141905
• [12] H. Xianzhi, Material mechanics. Wuhan University Press, 2018.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).