Proceedings of Italian Concrete Days 2016 (eBook)

Marco Di Prisco, Marco Menegotto (Herausgeber)

eBook Download: PDF

2018
550 Seiten
Springer International Publishing (Verlag)
978-3-319-78936-1 (ISBN)

Infos

This book gathers the best peer-reviewed papers presented at the Italian Concrete Days national conference, held in Rome, Italy, on October 27-28, 2016. The conference topics encompass the aspects of design, execution, rehabilitation and control of concrete structures, with particular reference to theory and modeling, applications and realizations, materials and investigations, technology and construction techniques. The contributions amply demonstrate that today's structural concrete applications concern not only new constructions, but more and more rehabilitation, conservation, strengthening and seismic upgrading of existing premises, and that requirements cover new aspects within the frame of sustainability, including environmental friendliness, durability, adaptability and reuse of works and / or materials. As such the book represents an invaluable, up-to-the-minute tool, providing an essential overview of structural concrete, as well as all new materials with cementitious matrices.

Inhalt

Preface 6
Organization 8
Scientific Committee 8
Contents 10
Materials, Technologies and Construction Techniques 14
Multi-criteria Analysis for Sustainable Buildings 15
Abstract 15
1 Introduction 15
2 A Multicriteria Approach for Roof Slab Technology 16
3 Parameters for Multi-criteria Analysis 19
3.1 Structural Properties 19
3.2 Properties Related to Indoor Comfort and Consumption Issues 19
3.3 Environmental Performance 20
3.4 Costs 21
3.5 Case Study: Evaluation Area and Criteria 21
4 Weighing System Definition 22
5 Methodology for Evaluating Criteria Performance 23
6 Case Study Results and Discussion 25
7 Conclusions 26
Acknowledgements 26
References 27
Turkey – Istanbul - Third Bosporus Bridge 29
Abstract 29
1 3rd Bosphorus Bridge 29
2 Towers 30
2.1 Towers’ Material 31
2.2 Legs 31
2.3 Crossbeams 32
2.4 Diaphragms 32
2.5 Temporary Struts 32
2.6 Stay-Cables’ Anchor Boxes 32
3 Construction Method 33
3.1 Slip-Forming System 34
3.2 Automatic Climbing System 36
4 Difficulties and Solutions 37
4.1 Mix Design 37
4.2 Geometry Control 39
5 Conclusions 42
References 43
Validation of NLFEA of Reinforced Concrete Walls Under Bidirectional Loading 44
Abstract 44
1 Introduction 44
2 NLFE Model Description 46
2.1 Concrete Model 46
2.2 Steel Model 47
3 Case Studies 49
3.1 TW4 49
3.1.1 Experimental Set-up 49
3.1.2 NLFE Model 51
3.1.3 NLFE Results 51
3.2 TUC 54
3.2.1 Experimental Set-up 54
3.2.2 NLFE Model 55
3.2.3 NLFE Results 56
4 Conclusions 58
References 59
Shell Modelling Strategies for the Assessment of Punching Shear Resistance of Continuous Slabs 61
Abstract 61
1 Introduction 61
2 Mechanical Model Based on the Critical Shear Crack Theory and Multi-layered Numerical Modelling According to PARC_CL Crack Model 62
3 Experimental Campaign Under Investigation, Ladner et al. (1977) 63
4 Parametric Analysis for Studying the Influence of CMA and Moment Redistribution 65
5 Conclusions 68
References 69
Inverse Identification of the Bond-Slip Law for Sisal Fibers in High-Performance Cementitious Matrices 70
Abstract 70
1 Introduction 70
2 Experimental Program 72
2.1 Materials and Processing 72
2.2 Hornification Process 73
2.3 Testing 73
3 Anlytical Modeling 73
4 Results and Analysis 76
4.1 Morphological Characterization of Sisal Fiber 76
4.2 Mechanical Properties 78
4.3 Bond-Slip Law Identification 78
5 Conclusions 80
Acknowledgements 81
References 81
Application and Advantages of a Balcony Thermal Insulation Element 83
Abstract 83
1 Introduction 83
2 System and Application 84
2.1 Balcony Insulation System 84
2.2 Experimental Investigation 85
2.3 Design Model 86
2.4 Comparison Between Test Result and Design Models 88
2.5 Thermal Performance Analysis 88
2.6 Example of Thermal Calculation 90
3 Conclusions 92
References 92
Design Guidelines for Precast Structures with Cladding Panels in Seismic Zones 93
Abstract 93
1 Introduction 93
2 General 95
3 Existing Buildings 95
4 Isostatic Connection System 99
5 Integrated Connection Systems 101
6 Dissipative Connection Systems 103
7 Conclusions 108
Acknowledgments 108
References 109
Hybrid Industrial/Recycled SFRC: Experimental Analysis and Design 110
Abstract 110
1 Introduction 110
2 RSF from Waste Tyres 112
3 Experimental Tests 112
3.1 Materials and Methods 112
3.2 Experimental Results 114
3.3 Analysis of the Results 115
4 Applications in Design 118
4.1 Constitutive Laws for Limit State Analyses 118
4.2 Analysis of the Results 119
5 Concluding Remarks 123
Acknowledgements 123
References 123
Comparison of Recent Code Provisions for Punching Shear Capacity of R/C Slabs Without Shear Reinforcement 125
Abstract 125
1 Introduction 125
2 Code Provisions 126
2.1 ACI 318 - 2014 126
2.2 EC2-2004 127
2.3 MC 2010 (MC) 128
2.4 RWTH Proposal for Revision of EC2 131
2.5 EPFL Proposal for Revision of EC2 132
2.6 Old Italian Recommendations 134
3 Parametric Analysis 134
4 Comparison with Experimental Data 137
5 Conclusions 141
References 142
Mechanical Modelling of Friction Pendulum Isolation Devices 145
Abstract 145
1 Introduction 145
2 Inspiring Physical Observation 148
3 Geometric Compatibility 149
4 Mechanical Model 151
5 Kinematic Compatibility 153
6 Dynamical Equilibrium 154
7 Thermo-Mechanical Coupling 155
8 Conclusions 156
References 157
MID1.0: Masonry Infilled RC Frame Experimental Database 159
Abstract 159
1 Introduction 159
2 The Database 162
2.1 Damage Classification and Failure Modes 166
3 Conclusions 170
References 170
The SonReb Method: Critical Review and Practical Aspects 173
Abstract 173
1 Introduction 173
2 SonReb: State of Art 175
3 Case Study 176
4 Results 178
4.1 Numerical Data Processing 178
4.2 Some Remarks 180
5 Conclusions 181
Acknowledgements 181
References 182
Innovative Structural Concretes with Phase Change Materials for Sustainable Constructions: Mechanical and Thermal Characterization 184
Abstract 184
1 Introduction 184
2 Materials and Experimental Methods 185
2.1 Phase Change Materials 185
2.2 Concrete Preparation Procedures 186
2.3 Experimental Setup 187
3 Mechanical Tests 188
4 Thermo-Physical Tests 191
5 Conclusions 193
Acknowledgements 194
References 194
Retrofitting RC Members with ExternalUnbonded Rebars 196
Abstract 196
1 Introduction 196
2 Experimental Investigation 198
2.1 Specimen Geometry 198
2.2 Material Properties 199
2.3 Test Set-up and Instrumentation 199
3 Experimental Results 201
3.1 Failure Mode 201
3.2 Crack Pattern 203
4 Double Harping Point System 205
4.1 Introduction 205
4.2 Evaluation of Actual Equivalent Stiffness 205
5 Concluding Remarks 210
Acknowledgements 210
References 210
Balanced Lift Method – Building Bridges Without Formwork 212
Abstract 212
1 Introduction 212
2 Bridge Across the River Lafnitz 215
3 Large Scale Test of the Balanced Lift Method 220
4 Conclusions 226
Acknowledgements 226
References 226
Fire Resistance 228
Improved Fire Resistance by Using Different Types of Cements 229
Abstract 229
1 Introduction 229
2 Experimental Program 231
2.1 Cements 231
2.2 Test Specimens and Variables 232
2.3 Test Methods 232
3 Results and Discussions 232
3.1 Development of Surface Cracks 232
3.2 Compressive Strength 234
4 Conclusions 237
References 237
Robustness Against Accidental Actions 239
Dynamics of Strongly Curved Concrete Beams by Isogeometric Finite Elements 240
Abstract 240
1 Introduction 240
2 Problem Statement 241
2.1 Constitutive Laws and Modal Analysis 241
2.2 Isogeometric Discretization 243
3 Results and Discussion 245
3.1 Clamped-Clamped Circular Arch 245
3.2 Hinged-Hinged Parabolic Arch 250
4 Conclusions 254
Acknowledgements 255
References 255
Simplified Non-linear Analyses for Fast Seismic Assessment of RC Frame Structures: Review and Proposal 257
Abstract 257
1 Introduction 257
1.1 Approximate Non-linear Static Analyses 258
1.2 An Alternative Approach 261
2 Application to Case Studies 264
3 Conclusions 268
References 269
A Semi-active Rocking System to Enhance the Seismic Dissipative Capability of Precast RC Columns 270
Abstract 270
1 Introduction 270
2 A Variable Base Restraint for Precast RC Columns: Control Algorithm 271
3 Calibration of the SA Controller: A Case Study 273
3.1 Case Study 274
3.2 Numerical Model 275
3.3 Numerical Simulations 276
4 Conclusions 280
References 280
Improved Gradient-Based Equivalent Linear Procedure for Probabilistic Displacement-Based Design of RC Structures, Accounting for Damage-Induced Stiffness Degradation 281
Abstract 281
1 Introduction 281
2 Original Method Formulation 282
3 Proposed Modification 284
3.1 Damage-Induced Stiffness Degradation for Equivalent Linear Analysis 284
3.2 Capacity Design 285
3.3 Consistency of Seismic Action Representations in Probabilistic Design and Inelastic Response-History Analysis for Validation 286
4 Applicative Example 288
4.1 Design Variables and Constraints 288
4.2 Seismic Hazard and Uncertainties Treatment 289
5 Results and Validation 290
6 Conclusions 293
References 294
Comparison Between Non-linear Numerical Models for R.C. Shear Walls Under Cyclic Loading 295
Abstract 295
1 Introduction 295
2 Case Studies 296
2.1 Lefas and Kotsovos Walls 296
2.2 Pilakoutas and Elnashai Walls 298
3 Finite Elements Models 300
3.1 Mesh and Material Models 300
3.2 Out-of-Plane Confinement 301
4 Results Discussion 302
4.1 Software B Results 304
4.2 Software C Results 304
5 Conclusions 306
References 306
Experimental Investigation on the Seismic Behaviour of a New Pier-to-Deck Connection for Steel Concrete Composite Bridges 307
Abstract 307
1 Introduction 307
2 Steel Concrete Composite Bridge with High Strength Steel and Concrete Cross Beam 308
2.1 Conceptual Design and Static Behaviour 308
3 Design of the Experimental Campaign 310
3.1 Subassemblies Identification 310
3.2 Description of the Specimens and Testing Program 312
3.3 Design of the Test Rig and Instrumentation 313
4 Description of the Results and Discussion 314
5 Identification of Damage Measures and Limit States 318
6 Conclusions 320
Acknowledgements 320
References 321
Seismic Prevention and Mitigation in Historical Centres 322
Abstract 322
1 Introduction 322
2 A Strategic Approach to Historical Centres 324
3 Urban Risk Assessment and Reduction 325
3.1 Post-earthquake Safety Survey: The Case of 2009 L’Aquila Earthquake 331
4 Impact of R.C. Structures 335
5 Conclusions 336
References 336
Non Linear Static Analysis: Application of Existing Concrete Building 338
Abstract 338
1 Introduction 338
2 Incremental Modal Pushover Analysis (IMPA) 340
3 Case Study 343
3.1 Building Description 343
3.2 Seismic Input 344
4 Results 344
5 Conclusion 348
Acknowledgements 349
References 349
Shear Connection Local Problems in the Seismic Design of Steel-Concrete Composite Decks 350
Abstract 350
1 Introduction 350
2 Case Studies and Modelling 352
2.1 Investigated Steel-Concrete Composite Bridges 352
2.2 Seismic Action 353
2.3 Structural Modelling and Seismic Analyses 354
3 Main Results 355
3.1 Single Span Bridge 355
3.2 Two-Span Bridge 360
4 Conclusions 362
Acknowledgements 362
References 362
Cloud to IDA: A Very Efficient Solution for Performing Incremental Dynamic Analysis 364
Abstract 364
1 Introduction 364
2 Methodology 365
2.1 Structural Performance Variable 365
2.2 Nonlinear Dynamic Analyses Procedure 366
3 Numerical Application 369
3.1 Building Description and Modeling 369
3.1.1 Flexural, Shear and Bar Slip Models 369
3.1.2 Total Lateral Response 372
3.2 Record Selection 373
3.3 Cloud Analysis 373
3.4 IDA Analysis 374
3.5 Cloud to IDA 375
3.6 Fragility Curves Results and Comparisons 375
4 Conclusions 376
Acknowledgements 376
References 376
Lifecycle, Upgrading and Reuse 378
Lifetime Axial-Bending Capacity of a R.C. Bridge Pier Cross-Section Subjected to Corrosion 379
Abstract 379
1 Introduction 379
2 Deterioration Modelling Due to Reinforcement Corrosion 381
3 Lifetime Prediction Methodology 382
4 Case Study 383
4.1 Deteriorating Process and Monte Carlo Simulations 385
5 Conclusions 389
References 390
The Effect of Alternative Retrofit Strategies on Reduction of Expected Losses: Evaluation with Deta ... 393
Abstract 393
1 Introduction 393
2 Computation of Losses Within the PEER PBEE Framework 394
2.1 Implementation of the Performance-Assessment Framework for Repair Cost Evaluation 395
2.2 Pushover Based Assessment 396
3 Application for a Case Study Building 397
3.1 Building Model 397
3.2 NLRH-Based Analysis and Costs Evaluation 399
3.3 Pushover Based Analysis and Costs Evaluation 400
4 Building Retrofit and Evaluation of Losses 401
4.1 Design of Building Retrofit 401
4.2 Reduction of Seismic Vulnerability 402
4.3 Expected Losses for Retrofitted Building 403
5 Conclusions 404
Acknowledgements 405
References 405
R. C. Beams Strengthened on Shear with FRP and FRCM Composites 408
Abstract 408
1 Introduction 408
2 Experimental Program 410
3 Results and Discussion 411
3.1 Additional Shear Strength Provided by the Strengthening System 413
3.2 Failure Mode and Cracking Pattern 413
3.3 Internal and External Shear Reinforcement Interaction 414
4 Conclusions 417
Acknowledgements 417
References 417
Seismic Retrofitting of RC Frames: A Rational Strategy Based on Genetic Algorithms 419
Abstract 419
1 Introduction 419
2 The Genetic Algorithm 421
2.1 Problem Statement and Formulation 421
2.2 Representation of “Individuals” 422
2.3 Seismic Analysis of “Individuals” and Evolution Criteria 424
2.4 Reproduction Operator 425
2.5 Crossover Operator 427
2.6 Mutation Operator 427
3 Sample Application 428
4 Conclusions 430
Acknowledgements 431
References 431
Analytical Prediction of the Flexural Response of External RC Joints with Smooth Rebars 433
Abstract 433
1 Introduction 433
2 Aim of Research and Range of Variation of Case Studies 434
3 Proposed Model 435
3.1 Beam Contribution 436
3.2 Column Contribution 438
3.3 Joint Contribution 441
3.4 Load-Deflection Response of the Structure 442
4 Experimental Validation 443
5 Conclusions 445
References 446
Moment-Axial Domain of Corroded R.C. Columns 448
Abstract 448
1 Introduction 448
2 Moment-Axial Forces Domain 449
2.1 Case of Pure Compression 450
2.2 Case of Pure Flexure 453
2.3 Case of Axial Force and Bending Moment 455
3 Experimental Validation 456
4 Conclusions 459
Acknowledgements 460
References 460
Correlation of In-Situ Material Characterization Tests and Experimental Performances of RC Members 462
Abstract 462
1 Introduction 462
2 Case Study Building 464
3 Building Demolition and Specimen Extraction 466
4 Material Tests on Extracted Members 467
4.1 Destructive Tests 467
4.2 Non-destructive Tests 469
5 Experimental Test on Extracted Column 469
6 Comparison Between Predicted and Experimental Axial Strength 471
7 Conclusions 473
Acknowledgements 473
References 473
ALER Building in Cinisello Balsamo (MI): An Example of Energy Efficient Refurbishment with EASEE Method 475
Abstract 475
1 Introduction 476
2 Italian Demo Building 478
2.1 Goal and Scope 479
2.2 Building Assessment Before Retrofitting 479
2.3 Retrofitting Design 480
2.4 External Retrofitting Process 482
3 Monitoring Campaign 485
4 Conclusions 487
Acknowledgment 488
References 488
Damage Analyses of Concrete Dams Subject to Alkali-Silica Reaction 489
Abstract 489
1 Introduction 489
2 Bi-phase Damage Model 490
2.1 Transport Laws 491
2.2 State Equations 492
2.3 Evolution Equations for the Damage 493
3 Case Study: An Arch Dam Subject to ASR 495
3.1 Monitoring System and Data 495
3.2 Finite Element Analysis 496
3.3 Mechanical Properties of Materials 496
3.4 Thermal Analysis 497
3.5 Humidity Analysis 499
3.6 Mechanical Analysis of the Dam-Foundation System 501
4 Conclusions 503
References 503
Slot Cutting of the Lago Colombo Dam, Affected by Swelling Deformation, to Bring the Behavior Back f ... 504
Abstract 504
1 Introduction 504
2 Dam Behaviour 505
2.1 Monitoring 505
2.2 Investigations 506
2.3 Conclusions 507
3 Rehabilitation Works 508
3.1 Design Choices 508
3.2 Construction Works 511
3.3 Monitoring During Works 514
4 Re-impounding and Dam Behaviour 516
4.1 Dam Monitoring 516
5 Conclusions 518
References 519
Spalling Sensitivity Test on Concrete 520
Abstract 520
1 Introduction 520
2 Test Setup 522
3 Results and Discussion 524
3.1 General Considerations 524
3.2 Load Effect 525
3.3 Role of Fibre Type 527
4 Conclusions 530
Acknowledgements 530
References 531
Seismic Loss Analysis of a Non-ductile Infilled RC Building 532
Abstract 532
1 Introduction 532
2 FEMA P-58 Methodology 533
3 Case Study 533
3.1 Numerical Models 534
4 Incremental Dynamic Analyses (IDA) 535
5 Loss Analysis 537
5.1 Fragility and Consequence Functions Assembly 537
5.2 Loss Analysis Results 537
6 Conclusions 539
References 540
Influence of Materials Knowledge Level on the Assessment of the Characteristic Value of the Shear Strength of Existing RC Beams 543
Abstract 543
1 Introduction 543
2 Procedure to Evaluate the Characteristic Value of a Capacity Indicator 544
3 Beams Geometries and Materials 545
4 Capacity Model 547
5 Knowledge Levels About the Beam Materials 548
6 Shear Strength of the Beams T1 and T2 550
7 Conclusions 553
Acknowledgements 553
References 553
Author Index 556

Produkt-Details

• Erscheint lt. Verlag: 16.4.2018
• Reihe/Serie: Lecture Notes in Civil Engineering
• Reihe/Serie: Lecture Notes in Civil Engineering
• Zusatzinfo: XII, 550 p. 403 illus.
• Verlagsort: Cham
• Sprache: englisch
• Themenwelt: Technik ► Bauwesen
• Themenwelt: Technik ► Maschinenbau
• Schlagworte: Cementitious Materials • Concrete Buildings • Concrete Corrosion Control • Concrete design • Concrete Durability • Fire-Resistant Concrete • ICD 2016 • Life-cycle Management • Reinforced Concrete Structures • Structural Concrete
• ISBN-10: 3-319-78936-8 / 3319789368
• ISBN-13: 978-3-319-78936-1 / 9783319789361