Dynamic mechanical characteristics of filling layer self-compacting concrete under impact loading

• Autorzy: Li Ning , Long Guangcheng , Fu Qiang , Song Hao , Ma Cong , Ma Kunlin , Xie Youjun , Li He

Identyfikatory

DOI

10.1016/j.acme.2019.03.007

• Języki publikacji: EN

Abstrakty

EN

Filling layer self-compacting concrete (FLSCC) is a key construction material in China Rail Track System (CRTS) III slab ballastless track and its resistance to impact loading is of great importance to the service security of high-speed train. In this paper, the dynamic mechani-cal characteristics of FLSCC under impact loading were investigated with a split Hopkinson pressure bar (SHPB) at strain rates ranging from 101 s_1 to 102 s_1. Results show that the compressive strength, peak strain, elastic modulus and toughness ratio of FLSCC all increase with strain rate. The increase factors of compressive strength (DIFc) and strain (DIFe) of FLSCC increase linearly with decimal logarithm of strain rate. The elastic modulus (Ed) and toughness ratio (TR) increase linearly with strain rate. Self-compacting concrete (SCC) shows greater strain rate effect than normal concrete (NC). However, FLSCC presents lower strain rate effect but better toughness performance than normal SCC. The incorporation of large content of SP and VMA provides FLSCC with higher porosity, which makes it possess excellent dynamic mechanical performance.

Słowa kluczowe

EN

filling layer self-compacting concrete; impact loading; dynamic mechanical characteristics; strain rate effect

PL

beton samozagęszczalny; właściwości mechaniczne; odkształcenie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. 19, no. 3
• Strony: 851--861
• Opis fizyczny: Bibliogr. 44 poz., fot., rys., tab., wykr.

Twórcy

autor

Li Ning

• School of Civil Engineering, Central South University, Changsha 410075, China

autor

Long Guangcheng

• School of Civil Engineering, Central South University, Changsha 410075, China

autor

Fu Qiang

• Department of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

autor

Song Hao

• School of Civil Engineering, Central South University, Changsha 410075, China

autor

Ma Cong

• School of Civil Engineering, Central South University, Changsha 410075, China

autor

Ma Kunlin

• School of Civil Engineering, Central South University, Changsha 410075, China

autor

Xie Youjun

• School of Civil Engineering, Central South University, Changsha 410075, China

autor

Li He

• College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)