Analysis and Design of Prestressed Concrete
- 1st Edition - April 17, 2022
- Imprint: Elsevier
- Author: Di Hu
- Language: English
- Paperback ISBN:9 7 8 - 0 - 1 2 - 8 2 4 4 2 5 - 8
- eBook ISBN:9 7 8 - 0 - 3 2 3 - 8 5 9 9 8 - 1
Prestressing concrete technology is critical to understanding problems in existing civic structures including railway and highway bridges; to the rehabilitation of older… Read more
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Prestressing concrete technology is critical to understanding problems in existing civic structures including railway and highway bridges; to the rehabilitation of older structures; and to the design of new high-speed railway and long-span highway bridges. Analysis and Design of Prestressed Concrete delivers foundational concepts, and the latest research and design methods for the engineering of prestressed concrete, paying particular attention to crack resistance in the design of high-speed railway and long-span highway prestressed concrete bridges. The volume offers readers a comprehensive resource on prestressing technology and applications, as well as the advanced treatment of prestress losses and performance. Key aspects of this volume include analysis and design of prestressed concrete structures using a prestressing knowledge system, from initial stages to service; detailed loss calculation; time-dependent analysis on cross-sectional stresses; straightforward, simplified methods specified in codes; and in-depth calculation methods. Sixteen chapters combine standards and current research, theoretical analysis, and design methods into a practical resource on the analysis and design of prestressed concrete, as well as presenting novel calculation methods and theoretical models of practical use to engineers.
- Presents a new approach to calculating prestress losses due to anchorage seating
- Provides a unified method for calculating long-term prestress loss
- Details cross-sectional stress analysis of prestressed concrete beams from jacking to service
- Explains a new calculation method for long-term deflection of beams caused by creep and shrinkage
- Gives a new theoretical model for calculating long-term crack width
Designers and researchers in prestressed concrete structures; advanced students in civil engineering, including railway bridge engineering, high-speed railway design and construction, highway bridge engineering, and road engineering
1 Basic concepts and applications of prestressed concrete
1.1 Basic concepts of prestressed concrete
1.1.1 Basic concepts
1.1.2 The functions of prestressing force
1.1.3 Prestress level
1.1.4 Prestressed versus reinforced concrete
1.1.5 Classification of prestressed concrete
1.2 History and applications of prestressed concrete
1.3 Development trends of prestressed concrete
REFERENCES
2 Prestressing materials
2.1 Concrete
2.1.1 Basic requirements of concrete
2.1.2 Composition of concrete
2.1.3 Compressive and tensile strength of concrete
2.1.4 Stress-strain relations for short-term loading
2.1.5 Modulus of elasticity and Poisson’s ratio
2.1.6 Creep
2.1.7 Shrinkage
2.1.8 Temperature effects
2.1.9 Fatigue
2.2 Prestressing tendons
2.2.1 Basic requirements of prestressing tendons
2.2.2 Classification of prestressing tendons
2.2.3 Mechanical properties of prestressing steel
2.2.4 Mechanical properties of prestressing FRP
2.2.5 Relaxation
2.2.6 Temperature effects
2.2.7 Fatigue
2.3 Non-prestressing steels
REFERENCES
3 Prestressing methods and construction technology
3.1 Pretensioning method
3.2 Post-tensioning method
3.3 Prestressing construction technology of continuous system
3.4 Anchorage system
3.4.1 Types of anchorage and connector
3.4.2 Anchorage and coupling device performance
3.4.3 Jacks for stretching tendons
3.5 Protection of tendons
3.6 Grouting and anchorage sealing of post-tensioned tendons
REFERENCES
4 The philosophy of analysis and design
4.1 Knowledge system of prestressed concrete
4.2 Analysis based on knowledge system
4.3 Design situations and Design strategies
4.4 Actions and combinations
4.4.1 Railway bridge actions and combinations
4.4.2 Highway bridge actions and combinations
4.4.3 Building actions and combinations
4.5 Allowable stress method design
4.6 Limit state design
4.6.1 Design for ultimate strength limit state
4.6.2 Design for serviceability limit state
4.6.3 Design for fatigue limit state
4.7 Durability design
4.8 General procedures for design of prestressed concrete structures
REFERENCES
5 Calculation of effective stress in prestressing tendons
5.1 Concept of effective stress of prestressing tendons
5.2 Effective stress immediately after transfer
5.2.1 The initial stress at jacking end
5.2.2 Prestress loss due to friction
5.2.3 Prestress loss due to anchorage seating
5.2.4 Prestress loss due to steam curing
5.2.5 Prestress loss due to elastic shortening
5.3 Long-term effective stress of bonded prestressing tendons
5.3.1 Influencing factors and calculation methods of long-term prestress loss
5.3.2 Unified approach to calculate time-dependent prestress loss in axially forced members
5.3.3 Unified approach to calculate time-dependent prestress loss in flexural members
5.3.4 Prestress loss due to concrete shrinkage and creep specified in codes
5.3.5 Prestress loss due to steel relaxation specified in codes
5.3.6 Long-term effective stress of pretensioned tendons
5.3.7 Long-term effective stress of bonded post-tensioned tendons
5.4 Long-term effective stress of unbonded post-tensioned tendons
5.4.1Unified approach to calculate time-dependent prestress loss in axially forced members
5.4.2 Unified approach to calculate time-dependent prestress loss in flexural members
5.4.3 Prestress loss due to concrete shrinkage and creep specified in codes
5.4.4 Prestress loss due to FRP relaxation specified in codes
5.3.5 Long-term effective stress of unbonded post-tensioned tendons
5.5 Lump sum estimate of total prestress losses in service period
REFERENCES
6 Prestressing force effect on structural internal forces
6.1 Equivalent loads of prestressing force
6.2 Primary internal forces caused by prestressing force
6.3 Secondary internal forces caused by prestressing force
6.4 Secondary internal forces due to creep
6.5 Concordance tendons and linear transformation principle
6.6 References
7 Stress analysis of prestressed concrete flexural members
7.1 Cross-sectional stresses vary from construction to failure
7.2 Stress analysis of uncracked sections
7.2.1 Short-term normal stresses in uncracked sections
7.2.2 Long-term normal stresses in uncracked sections
7.2.3 Shear stresses and principal stresses in uncracked sections
7.3 Stress analysis of cracked sections
7.3.1 Cracking moment
7.3.2 Stresses in cracked sections
7.4 Calculation of fatigue stress
REFERENCES
8 Calculation of deflection and crack width
8.1 Calculation of deflection
8.1.1 Flexural behavior and assumptions in deflection calculation
8.1.2 Short-term deflection of flexural members
8.1.3 Long-term deflection of flexural members
8.2 Calculation of crack width
8.2.1 Cracking behavior and assumptions in calculations
8.2.2 Cracking at loading
8.2.3 Long-term crack width of flexural members
8.3 Crack control
REFERENCES
9 Design of prestressed concrete flexural members
9.1 Ultimate flexural strength of normal section
9.1.1Flexural behavior at ultimate loads
9.1.2 Assumptions in calculation of ultimate flexural strength
9.1.3 Equivalent rectangular stress block
9.1.4 Relative-boundary compressive zone's height
9.1.5 Ultimate flexural strength of normal section
9.2 Ultimate strength of inclined section
9.2.1 Failure patterns of inclined section and influencing factors on shear strength
9.2.2 Ultimate shear strength of inclined section
9.2.3 Ultimate flexural strength of inclined section
9.3 Design of prestressed concrete flexural members
9.3.1 Typical cross-sections for prestressed concrete flexural members
9.3.2 Reinforcement detailing
9.3.3 Design of cross-sections
9.3.4 Selection of prestressing tendons
9.3.5 Estimation of cross-sectional area of prestressing tendons
9.3.6 Layout of prestressing tendons in simply supported beams
9.3.7 Layout of prestressing tendons in continuous box girders
9.4 Verification and adjustment of design scheme
9.4.1 Verification of cross-sectional stresses
9.4.2 Verification of crack resistance
9.4.3 Verification of fatigue stresses
9.4.4 Verification of deflection
9.4.5 Verification of crack width
9.4.5 Verification of live-load angles at beam end
9.4.6 Verification of ultimate strength
9.5 Example--design of prestressed concrete railway and highway beams
REFERENCES
10 Analysis and design of prestressed composite beams
10.1 Types of prestressed composite beams
10.2 Flexural behavior of prestressed composite beams
10.3 Cross-sectional stress analysis
10.4 Deflection and crack
10.5 Horizontal shear transfer
10.6 Ultimate shear strength
10.7 Ultimate flexural strength
10.8 Design of prestressed composite beams
REFERENCES
11 Analysis and design of prestressed concrete torsional members
11.1 Compatibility torsion and equilibrium torsion
11.2 Torsional failure and influencing factors on torsional strength
11.3 Ultimate strength of pure torsional members
11.3 Ultimate strength of shear-torsional rectangular and box sections
11.4 Design for bending, shear and torsional strength
REFERENCES
12 Analysis and design of prestressed compression and tension members
12.1 Compression members
12.1.1 Compression failure and influencing factors on ultimate strength
12.1.2 Cross-section analysis under the action of axial force and bending
12.1.3 Short-term and long-term deformations
12.1.4 Assumptions in calculation of ultimate strength
12.1.5 Compression strength of axial compression members
12.1.6 Ultimate strength of eccentric compression members
12.1.7 Buckling strength of slender compression members
12.1.8 Design of compression members
12.2 Pretensioned spun concrete pile
12.2.1 Types of pretensioned spun concrete pile
12.2.2 Cross-sectional stresses and crack control
12.2.3 Ultimate strength of pretensioned spun concrete piles
12.2.4 Design of pretensioned spun concrete piles
12.3 Tension members
12.3.1 Tension failure and influencing factors on ultimate strength
12.3.2 Short-term and long-term stresses and deformations
12.3.3 Ultimate strength of axial tension members
12.3.4 Ultimate strength of eccentric tension members
12.1.5 Design of tension members
REFERENCES
13 Analysis and design of anchorage zone
13.1 Transfer length and development length of pretensioned tendons
13.2 Anchorage zone of post-tensioned members
13.2.1 Stress analysis of end anchorage zone
13.2.2 Stress analysis of middle anchorage zone
13.2.3 Local compression strength of anchorage zone
13.2.4 Tension strength of anchorage zone
13.3 Reinforcement design for anchorage zone in post-tensioned members
REFERENCES
14 Design of unbonded prestressed concrete beams
14.1 Concepts of unbonded prestressed concrete beams
14.2 Flexural behavior of unbonded prestressed concrete beams
14.3 Stress analysis of unbonded prestressed concrete beams
14.3.1 Effective stress of unbonded prestressing tendons
14.3.2 Stress increment in unbonded tendons under loading
14.3.3 Ultimate stress of unbonded tendons
14.4 Ultimate flexural strength of unbonded prestressed concrete beams
14.5 Calculation and control of deflection and crack
14.5.1 Deflection
14.5.2 Crack
14.5 Calculation and control of deflection and crack
14.6 Design of unbonded prestressed concrete beams
REFERENCES
15 Analysis and design of prestressed concrete slabs
15.1 Prestressed slab system
15.2 Design of one-way prestressed concrete slabs
15.3 Flexural behavior of two-way prestressed concrete slabs
15.4 Analysis by the equivalent-frame method
15.5 Two-direction load balancing
15.6 Control of deflection and crack
15.7 Transfer moment between columns and slab
15.8 Design of two-way prestressed concrete flat plates
15.8.1 Reinforcement detailing
15.8.2 Design for flexural strength
15.8.3 Design for shear strength
REFERENCES
16 Analysis and design of external prestressed concrete structures
16.1 Concepts of external prestressed concrete structures
16.2 External prestressing system and external tendon assembly
16.3 Stress analysis of external prestressing tendons
16.3.1 Effective stress of external prestressing tendons
16.3.2 Stress increment in external tendons under loading
16.3.3 Ultimate stress of external tendons
16.4 Ultimate strength
16.4.1 Flexural strength of normal section
16.4.2 Shear strength of inclined section
16.5 Cross-sectional stress analysis
16.6 Calculation and control of deflection and crack
16.6.1 Calculation and control of deflection
16.6.2 Calculation and control of crack
16.7 Design of external prestressed concrete structures
REFERENCES
- Edition: 1
- Published: April 17, 2022
- Imprint: Elsevier
- Language: English
DH
Di Hu
Di Hu is Associate Professor in the School of Civil Engineering, at Central South University, China. He obtained his PhD from Central South University, on transportation engineering. He has been researching prestressed concrete structures for over 20 years, including on bridge load tests, and has worked on the design of over ten bridges. He has previously been a visiting scholar at the University of British Columbia, as well as being assigned by the China Ministry of Railways to Nigeria as part of an expert group on bridge engineering and steel bridge maintenance. He is the author of and monographs, as well as numerous research articles.
Affiliations and expertise
Associate Professor, School of Civil Engineering, Central South University, ChinaRead Analysis and Design of Prestressed Concrete on ScienceDirect