Blaauwendraad Stringer-Panel Models in Structural Concrete

Applied to D-region Design
1. Auflage 2018
ISBN: 978-3-319-76678-2
Verlag: Springer International Publishing
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 103 Seiten

Reihe: SpringerBriefs in Applied Sciences and Technology

Structural concrete designers nowadays distinguish between B-regions (named after Bernoulli beam theory) and D-regions (D standing for 'disturbed'). They are all familiar with B-regions, but less acquainted with the expertise required for D-regions. To design D-regions, the Strut-and-Tie Model (STM) is usually applied, a model laid down worldwide in structural codes of practice. The Stringer-Panel Model (SPM) recommended here is a companion method to the STM, with the advantage of being suitable for different load cases and reversed loading. This being so, the SPM is suitable for linear-elastic analyses where durability is a key consideration, but also suits structural design for contexts of cyclical seismic activity. Finally, this book sets out how structural engineers who prefer the STM can nevertheless apply the SPM to determine a proper strut-and-tie model.

Johan Blaauwendraad is professor emeritus at Delft University of Technology, The Netherlands.

Autoren/Hrsg.

Blaauwendraad, Johan

Inhaltsverzeichnis

1;Preface;6
2;Acknowledgements;7
3;Contents;8
4;1 Introduction to Stringer-Panel Models;11
4.1;Overview of the Strut-and-Tie Model;11
4.1.1;Design Steps in the STM;12
4.1.2;Challenges in STM Design;13
4.1.3;Some Considerations in Using the STM;13
4.1.4;Twofold Request for Improvement;14
4.2;Concept of the Stringer-Panel Model;15
4.2.1;Design Steps Using the SPM;15
4.2.2;Commonalities Between STM and SPM;16
4.2.3;Objective of This Book;16
4.2.4;Fundamental Equations of Equilibrium;18
4.2.5;Design Examples in This Book;19
4.2.6;Degrees of Freedom in Stringers and Panels;20
4.2.7;Statical Determinacy;20
4.2.8;Solution Options;21
4.2.9;SPM Considered as a Design Method with Stress Fields;21
4.3;Dimensioning Stringers, Panels and Nodes;23
4.3.1;Detailing of Reinforcement;23
4.3.2;Check of Concrete Compressive Stress in Stringers;23
4.3.3;Design of Nodes;24
4.4;Conclusion;24
5;2 Dapped Beam;25
5.1;Discussion of Extent of D-Region;26
5.2;Final Model;27
5.3;Solution;27
5.4;Stringer Reinforcement;29
5.5;Panel Reinforcement;31
5.6;Check of Stringers Under Compression;32
5.7;Check of Concrete Stress in Panels;32
5.8;Bond and Anchorage of Stringers;32
5.9;Remark;33
5.10;Compressive Normal Web Stresses in Concrete Beam Theory;33
5.11;Braking Force;34
6;3 Beam with a Recess;37
6.1;Remark;39
6.2;Strut-and-Tie Model;40
7;4 Frame Joints and Corbels;42
7.1;Frame Joints;42
7.2;Corbel;44
8;5 Opening in Box Web;48
8.1;Reinforcement;49
8.2;Strut-and-Tie Model;50
9;6 Console with Opening;51
9.1;First Solution;51
9.1.1;Strut-and-Tie Model;52
9.1.2;Comparison with FE Analysis;54
9.2;Second Solution;55
9.2.1;Alternate STM Solution;57
10;7 Deep Beam with Opening;59
10.1;Problem Statement;59
10.2;Stringer-Panel Model;60
10.2.1;Remark 1;63
10.2.2;Remark 2;63
10.3;Comparison with Strut-and-Tie Model;63
11;8 Wall with Large Opening;65
11.1;Stringer-Panel Model;66
11.1.1;Models for Separate Wall Parts;66
11.1.2;Model for Integrated Wall;67
11.2;Derivation of Strut-and-Tie Model;69
12;9 Integral Bridge;72
12.1;Stringer-Panel Model (2D);75
12.2;Strut-and-Tie Model (2D);76
12.3;Strut-and-Tie Model, Third Dimension;76
13;10 Diaphragm Floor Slab;81
13.1;Loading;81
13.2;Spring Constants;82
13.3;Stringer Extensional Stiffness;83
13.4;Panel Shear Stiffness;83
13.5;Analysis Results and Discussion;83
14;Appendix 1: Linear-Elastic Analysis Using the Program SPM.py;86
14.1;A1.1 Target Models;86
14.1.1;Outline placeholder;1
14.1.1.1;Stringer;86
14.1.1.2;Rectangular Shear Panel;87
14.1.1.3;Quadrilateral Shear Panel;87
14.1.1.4;Two-Dimensional Bar;88
14.1.1.5;Three-Dimensional Bar;88
14.1.1.6;Tying;88
14.1.2;A1.2 Access to Program;89
14.1.3;A1.3 Facts on Python Scripts;90
14.1.4;A1.4 Particulars of SPM.py;91
14.1.5;A1.5 Example with Rectangular Panels;92
14.1.5.1;Extensional Stringer Stiffness;93
14.1.5.2;Shear Stiffness of Panels;93
14.1.5.3;Supports;93
14.1.5.4;Input Data;93
14.1.5.5;Output Data;93
14.1.5.6;Remark;95
14.1.6;A1.6 Example with Quadrilateral Panels;95
14.1.6.1;Extensional Stringer Stiffness;96
14.1.6.2;Shear Stiffness of Panels;96
14.1.6.3;Supports;97
14.1.6.4;Input Data;98
14.1.6.5;Output;98
14.1.6.6;Discussion of Results;98
14.1.6.7;Derivation of Tying Relations;99
15;Appendix 2: Linear-Elastic Analysis Using Matlab Code and SAP2000;101
16;References;103