Development of Ultra-High Performance Concrete against Blasts: From Materials to Structures

424 Pages·2018·23.7 MB·English

by  Chengqing Wu

Development of Ultra-High Performance
Concrete Against Blasts
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Woodhead Publishing Series in Civil
and Structural Engineering
Development of
Ultra-High Performance
Concrete Against Blasts
From Materials to Structures
Chengqing Wu
Jun Li
Yu Su
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Contents
Preface vii
Acknowledgment ix
1 Introduction 1
1.1 Developmentofmodernhighstrengthconcrete 1
1.2 Historical development ofultra-highperformanceconcrete 2
1.3 Applicationofultra-highperformanceconcreteinprotectivedesign 9
References 16
2 Development,testing,andnumericalsimulationofultra-high
performanceconcreteatmateriallevel 23
2.1 Introduction 23
2.2 Ultra-highperformanceconcretedevelopmentwithsteelfiberand
nanomaterialaddition 26
2.3 Influencesofnanoparticlesondynamicstrengthofultra-high
performanceconcrete 41
2.4 Effectsofsteelfibersondynamicstrengthofultra-highperformance
concrete 62
2.5 Meso-scalemodelingofultra-highperformanceconcrete 72
References 89
3 Ultra-highperformanceconcreteslabsunderblastloads 95
3.1 Introduction 95
3.2 Commercialultra-highperformanceconcreteslabsunderblastloads 100
3.3 Investigationofultra-highperformanceconcreteslabandnormal
strengthconcreteslabundercontactdetonation 128
3.4 Astudyofconcreteslabswithsteelwiremeshreinforcementunder
close-inexplosiveloads 146
3.5 Experimentalandnumericalstudyonsteelwiremesh-reinforced
concreteslabundercontactexplosion 164
3.6 Blastresistanceofconcreteslabreinforcedwithhigh-performance
fibermaterial 179
3.7 Derivationofnormalizedpressure(cid:1)impulsecurvesforflexural
ultra-highperformanceconcreteslabs 191
References 209
vi Contents
4 Ultra-highperformanceconcretecolumns 215
4.1 Introduction 215
4.2 Blastresistanceofultra-highperformanceconcretecolumns 217
4.3 Postblastresidualload-carryingcapacityofultra-highperformance
concretecolumns 235
4.4 Numericalsimulationofultra-highperformanceconcretecolumns 245
4.5 Damageevaluationofultra-highperformanceconcretecolumns 251
4.6 Simplifiedfiniteelementmethodanalysisofultra-highperformance
fiber-reinforcedconcretecolumnsunderblastloads 268
References 280
5 Ultra-highperformanceconcrete-filledsteeltubularcolumns 283
5.1 Introduction 283
5.2 Experimentalstudyofconcrete-filledsteeltube/concrete-filled
double-skinsteeltubecolumnsagainstclose-range blasts 285
5.3 Residualcapacityofultra-highperformanceconcrete-filledsteel
tubecolumnsagainstclose-range blasts 314
5.4 Numericalsimulationofconcrete-filledsteelsquarecolumns
againstblasts 331
5.5 Numericalmodelingofconcrete-filleddouble-skinsteeltubular
columnsagainstblasts 345
5.6 Numericalstudyofblastresistanceofsquareconcrete-filled
double-skinsteeltubecolumnswithsteel-fiber reinforcedconcrete 361
5.7 Numericalderivationofpressure(cid:1)impulsediagramsforsquare
ultra-highperformanceconcrete-filleddouble-skintubecolumns 379
References 391
Futurework 397
Index 399
Preface
In recent years scenarios involving terrorism activities continue to increase, struc-
tural protection against blast loads has been and will continue to be an important
topic for engineering practitioners and researchers. Extensive research has been
conductedtofigureouttheeffectivemeanstoensurethestructuralsafety.
Recent advances in concrete admixtures and nanotechnology ensure the material
durability, serviceability, and mechanical strength, which lead to the development
of ultra-high performance concrete. Improvement in the concrete compressive
strength leads to a significant reduction in structural member size and self-weight,
which in turn results in project cost reduction and structural esthetic enhancement.
Microreinforcement from steel fibers drastically improves the material ductility
after cracking, which further elevates material energy absorption capacity. Despite
these advantages, until now there is a lack of systematic study on ultra-high perfor-
mance concrete to enlighten the community about the potential of this new con-
structionmaterial.
In this book, the development of UHPC materials and their application in
protective structures are presented and discussed. The topics covering in this book
range from material development to field blast tests, and to three-dimensional finite
element modeling. This book compiles the most recent work in ultra-high
performance concrete structures against blast loads. It is not intended to be an
exhaustive treatise on ultra-high performance concrete, because ultra-high
performanceconcretetechnologyandknowledge areevolvingquickly. Thisbook is
primarily written to serve as a guide to engineers, researchers, and graduate
students, to present the outstanding features of ultra-high performance concrete as a
protectiveconstructionmaterial.
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Acknowledgment
Part of the content in this book is based on the research work done by Juechun Xu,
Fangrui Zhang, and Jonathon Dragos in their PhD studies at the University of
Adelaide. Contribution from Dr. Hongwei Wang at Guangzhou University is
acknowledged. Prof. Zhong-Xian Li from Tianjin Chengjian University provided
advice and support on the static tests. Prof. Qin Fang from PLA University of
Science and Technology and Prof. Zhongqi Wang from Beijing University of
Science and Technology provided strong support in the field blast tests. Technical
adviceofProf.HongHaofromCurtinUniversityisgratefullyacknowledged.