An experimental evaluation of the blast resistance of heterogeneous concrete-based composite bridge decks

توضیحات

ABSTRACT

Because of the current geopolitical situation, research on improving the resistance of the civil and transport infrastructure to blast or impact loads has gained considerable attention. This paper presents the results of fullscale blast experiments designed to characterize the resistance of concrete-based composite bridge decks  ubjected to close-in blast loading. Three composite decks with different degrees of heterogeneity were proposed and tested: a slab with basalt fiber meshes in multiple layers along the depth of the specimen, a slab with recycled textile sheets 100 mm in total thickness, and a typical hollow-core prestressed slab. The dependence of the extent of the blast damage on the material characteristics of the composite material was studied. A detailed study of the damage to the specimen caused by the close-in explosion found apparent delamination of all tested composite specimens. The heterogeneity of the layered composite material converts the blast damage due to internal rebounds into layer delamination.

INTRODUCTION

Due to the current geopolitical situation, there has been a considerable increase in the number of terrorist acts in recent years. The need to improve the resistance to blast or to impact of the civil and transport infrastructure has led to increased interest in research and development on various materials, and on their resistance to high strain-rate loading. This paper presents the results of a full-scale experimental program focused on the blast resistance  of hybrid concrete specimens subjectedto close-in blast loading, and the dependence of the resistance on the
composition and the material properties of the specimen. This research program built on previous research conducted by the authors. Since 2010, the authors have been conducting experiments with an unchanged arrangement, using various types and compositions of concrete, ranging from normal-strength concrete without distributed reinforcement (NSC) to ultrahigh-performance fiber-reinforced concrete (UHPFRC). The results of earlier experiments are presented in . To explore ways of further enhancing the blast resistance of concrete, the
experiments presented in this paper introduced three specimens with an atypical internal structure made of newly-developed concrete-based composite materials utilizing basalt fiber meshes and recycled textile sheets.

Year: ۲۰۱۸

Publisher : ELSEVIER

 By : Radek Hajek, Josef Fladr, Jiri Pachman, Jiri Stoller, Marek Foglar

File Information: English Language/ 7 Page / size: 2.35 MB

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سال : ۱۳۹۶

ناشر : ELSEVIER

کاری از : رادک هاجک، یوزف فلاد، جیری پاچمن، جری استولر، مارک فوگلر

اطلاعات فایل : زبان انگلیسی / 7 صفحه / حجم : MB 2.35

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