Structural effects and real strain‑rate effects on compressive strength of sustainable concrete with crumb rubber in split Hopkinson pressure bar tests

• Autorzy: Feng, Wanhui , Chen, Baiyu , Tang, Yunchao , Wei, Wenbo , He, Weiming , Yang, Yongmin
• Języki publikacji: EN

Abstrakty

EN

The dynamic increase factor (DIF) of the concrete material strength, obtained using a split Hopkinson pressure bar (SHPB), includes structural effects that do not precisely reflect the real strain-rate effect of concrete. To further clarify the real strain-rate effects of rubberised concrete (RC), an experimental investigation regarding the dynamic compressive response of ordinary concrete (NC) and RC with three rubber contents (10%, 20%, and 30%) was performed in this study. Additionally, based on a dynamic constitutive model, i.e., the Karagozian and Case (K&C) concrete model, numerical SHPB tests were conducted using the LS-DYNA software. According to the experimental results, all parameters of the K&C model were discussed, and the damage factors were modified to satisfy the mechanical properties of RC. After validating the numerical model, it was observed that the experimental DIF included the inertial enhancement and the real DIF. Moreover, because rubber particles effectively reduce the density and improve the deformation capacity of concrete, the real strain-rate effect of RC was found to be more rate-sensitive than that of NC by analysing the radial stress distribution. In addition to lateral inertia, another external source, namely, the interface friction between the specimen and bars, which can produce lateral confinement, was further studied. It was found that interface friction significantly contributes to lateral confinement; however, as the strain rate increased, the impact generally decreased. Finally, the mechanism of the strain-rate effect of RC was clarified.

Słowa kluczowe

PL

dzielony pręt Hopkinsona; współczynnik wzrostu; szybkość odkształcania

EN

rubberised concrete; split Hopkinson pressure bar; dynamic increase factor; strain rate effect

• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2022
• Tom: Vol. 22, no. 3
• Strony: art. no. e136
• Opis fizyczny: Bibliogr. 51 poz., rys., tab., wykr.

Twórcy

autor

Feng, Wanhui

• College of Urban and Rural Construction, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
• Guangdong Lingnan Township Green Building Industrialization Engineering Technology Research Center, Guangzhou 510225, China
• Institute of Sustainable Building and Energy Conservation of Zhongkai University of Agricultural Engineering, Guangzhou 510225, China

autor

Chen, Baiyu

• School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Pariser Building, Manchester M13 9PL, UK,

autor

Tang, Yunchao

• College of Urban and Rural Construction, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China,
• Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China
• Guangdong Lingnan Township Green Building Industrialization Engineering Technology Research Center, Guangzhou 510225, China
• Institute of Sustainable Building and Energy Conservation of Zhongkai University of Agricultural Engineering, Guangzhou 510225, China

autor

Wei, Wenbo

• College of Urban and Rural Construction, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China

autor

He, Weiming

• College of Urban and Rural Construction, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China

autor

Yang, Yongmin

• College of Urban and Rural Construction, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
• Guangdong Lingnan Township Green Building Industrialization Engineering Technology Research Center, Guangzhou 510225, China
• Institute of Sustainable Building and Energy Conservation of Zhongkai University of Agricultural Engineering, Guangzhou 510225, China

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)

Identyfikatory

DOI

10.1007/s43452-022-00457-x