Structural response of RC wide beams under low-rate and impact loading

Abbas, Ali A.; Pullen, A. D.; Cotsovos, Demetrios M.

doi:10.1680/macr.2010.62.10.723

Cited by 20 publications

(22 citation statements)

References 8 publications

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“…For this purpose, guidelines for testing reinforced concrete beams under impact loads were followed to specify the size of specimen, weight of hammer and the drop height, see, e.g. [17]- [20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Flexural Behaviour of Reinforced Baked Clay Beams under Impact Loading

Lakho¹,

Zardari²

2016

ENG

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This paper presents behaviour of Reinforced Baked Clay (RBC) beams under drop weight impact loading. The beams were made of two different grades of baked clay with cube crushing strength of 20 MPa and 30 MPa, respectively. The RBC beams were subjected to repeated drop weight loading by a hammer of weight equal to that of the specimen being tested. The results showed that the impact resistance of the RBC beams was governed by the compressive strength of the baked clay. Failure of grade 20 beams occurred due to irregular cracks and the beams of grade 30 failed by opening of a single crack at mid span. It was observed that the beams of grade 30 had sustained about 1.5 times more number of impacts until steel in tension zone yielded and failed completely after necking.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Flexural Behaviour of Reinforced Baked Clay Beams under Impact Loading

Lakho¹,

Zardari²

2016

ENG

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“…It has been established numerically [1][2][3][4] and experimentally [5][6] that the dynamic structural responses of RC elements differ to those observed under corresponding static loading once certain thresholds of applied loading rate are surpassed. The shift in structural response with increasing loading rates is considered to be associated with (a) structural arrangements (such as geometry, reinforcement and boundary details), (b) the brittle nature and triaxiality characterising concrete material behavior, (c) the nature of the problem at hand (i.e.…”

Section: Introductionmentioning

confidence: 99%

Fe Modelling of SFRC Beams Under Impact Loads

Behinaein¹,

Abbas²,

Cotsovos³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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The present work aims at investigating the structural behaviour of steel-fibrereinforced concrete (SFRC) beams under high-rate loading conditions mainly associated with impact problems. A simple, yet practical non-linear finite-element analysis (NLFEA) model was used in the study. The model is mainly focused on realistically describing the fully brittle tensile behaviour of plain concrete as well as the contribution of steel fibres to the postcracking response. The constitutive relations were incorporated into ABAQUS software brittle-cracking concrete model in order to adjust the latter to allow for the effects of fibres. Comparisons of the numerical predictions with their experimental counterparts demonstrated that the model employed herein, despite its simplicity, was capable of providing realistic predictions concerning the structural responses up to failure for different SFRC structural configurations. In the present study, the previous work is extended in order to numerically investigate the structural responses of simply-supported SFRC beams under impact loading. Data obtained from drop-weight tests on RC beams (without fibres) indicates that the response under impact loading differs significantly from that established during equivalent static testing. Essentially, there is (i) an increase in the maximum sustained load and (ii) a reduction in the portion of the beam span reacting to the impact load. However, there is considerable scatter making it difficult to ascertain the effect of loading rate on various aspects of RC structural response. To achieve this dynamic NLFEA is employed which is capable of realistically accounting for the characteristics of the problem at hand, a wave propagation problem within a highly non-linear medium. Following validation, a further study was conducted to assess the effect of steel fibers (provided at a dosage of Vf = 1%) on key aspects of structural response such as maximum sustained load, load-deflection curves, deformation profiles and ductility) under different rates and intensities of impact loading. The predictions reveal that steel fibers can potentially increase the maximum sustained load, ductility, toughness exhibited by SFRC members under impact loading compared to their RC counterparts.

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“…al. , 2002Saatci and Vecchio 2009;Tang and Saadatmanesh 2005;Abbas et al 2010;Remennikov and Kaewunruen 2006). However, the former impact tests conducted by falling weight impacting at the mid height of the specimen, lack of presenting the real dynamic response of RC columns subjected vehicular impacts; since low elevation impact tests of axially loaded RC columns have not been explored extensively by the earlier researchers.…”

Section: Introductionmentioning

confidence: 99%

AFRP retrofit of reinforced concrete columns against impact loading

Gurbuz¹,

İlki²,

Thambiratnam³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Structures can be exposed to impact loads as a result of an explosion, falling objects, projectiles and vehicle collisions. Within the increasing threat of these impact sources, it is very important to protect the columns that are the vital members of the structural systems to ensure structural and personal safety. This study focuses on the performance of axially loaded reinforced concrete members subjected to impact loading. A dropped-weight test set-up developed to perform impact tests on reinforced concrete members. The test set-up was used to perform low elevation impact tests on reinforced concrete (RC) columns that targets to simulate vehicular impact against ground floor columns of low-rise buildings. Since, there is limited information about the transverse impact performances of RC columns; the main objective of this research is to assess the vulnerability of RC columns under transverse impact loads and to enhance their performances by using Aramid Fiber Reinforced Polymer (AFRP) sheets. The scope is limited to 300 mm square columns with 3 m height in low to medium rise buildings which were found to be more vulnerable to lateral impacts according to previous research conducted by the authors, (Gurbuz et al. 2010(Gurbuz et al. , 2011. This research provides fundamental knowledge on the behavior of RC columns under low elevation impact loading and also generates new information on impact strengthening of vulnerable concrete columns by AFRP sheets.

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Structural response of RC wide beams under low-rate and impact loading

Cited by 20 publications

References 8 publications

Experimental Study of Flexural Behaviour of Reinforced Baked Clay Beams under Impact Loading

Experimental Study of Flexural Behaviour of Reinforced Baked Clay Beams under Impact Loading

Fe Modelling of SFRC Beams Under Impact Loads

AFRP retrofit of reinforced concrete columns against impact loading

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