Anchorage zone behavior and strength prediction of high‑performance concrete containing coarse aggregate confined with spirals

• Autorzy: Li Sheng , Zheng Wenzhong , Zhou Wei , Li Ruisen , Qiu Xianyelin

Identyfikatory

DOI

10.1007/s43452-023-00801-9

• Języki publikacji: EN

Abstrakty

EN

High-performance concrete containing coarse aggregate (HPC-CA) has superior cost efficiency and reduced early cracking risk compared with traditional UHPC. HPC-CA is distinguished by high strength, lightweight, superior durability and rapid growth of early strength, presenting promising in prefabricated industry and prestressed structures. However, extreme brittleness will generate non-ductile failures, thus spiral secondary reinforcement is usually used to improve ductility. Certain differences existed between HPC-CA and ordinary-strength concrete in microstructure and macroscopic mechanical properties, and the existing code provisions cannot be directly applied to HPC-CA. Some fundamental knowledge gaps need to be filled to improve understanding of the post-tensioned HPC-CA structures, including the anchorage zone behaviors of HPC-CA confined with spirals as well as the establishment of bearing capacity calculation methods. For this purpose, 10 specimens were designed and tested under local pressure based on the unbonded prestressed concrete slabs. The cracking patterns, failure characteristics, load-deformation relationships, load-spiral strain curves and wedge features were obtained. Besides, a calculation equation was developed to predict the local bearing capacity of HPC-CA with spirals. Meanwhile, a general bearing capacity prediction model serving the anchorage zone design was established and verified with the tested results and specification formulas.

Słowa kluczowe

EN

prestressed concrete slab; high-performance concrete; coarse aggregate; reinforcement secondary; pressure of local; bearing capacity prediction

PL

płyta z betonu sprężonego; beton wysokiej wytrzymałości; kruszywo grube; zbrojenie wtórne; ciśnienie lokalne; prognozowanie nośności

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 4
• Strony: art. e257, 1--19
• Opis fizyczny: Bibliogr. 49 poz., il., tab., wykr.

Twórcy

autor

Li Sheng

• School of Civil Engineering, Harbin Institute of Technology, Harbin, China

autor

Zheng Wenzhong

• School of Civil Engineering, Harbin Institute of Technology, Harbin, China
• Key Lab of Structures Dynamic Behavior and Control Ministry of Education, Harbin Institute of Technology, Harbin, China
• Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters, Harbin Institute of Technology, Harbin, China

autor

Zhou Wei

• School of Civil Engineering, Harbin Institute of Technology, Harbin, China
• Key Lab of Structures Dynamic Behavior and Control Ministry of Education, Harbin Institute of Technology, Harbin, China
• Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters, Harbin Institute of Technology, Harbin, China

autor

Li Ruisen

• School of Civil Engineering, Harbin Institute of Technology, Harbin, China

autor

Qiu Xianyelin

• School of Civil Engineering, Harbin Institute of Technology, Harbin, China

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