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Composite Concrete-Steel Construction in Tall Buildings by Dr. Naveed
- 1. Composite Concrete-Steel Construction in Tall Buildings Dr. Naveed Anwar CONCRETE AND STEEL: TECHNOLOGY, ENGINEERING & DESIGN (CASTED 2018) May 24-26 2018, Marriott Hotel Manila, Philippines)
- 2. 2 Dr. Naveed Anwar, CASTED 2018, Manila • Reinforced Concrete Only • Steel Only Composite and Mixed Systems • Composite – Concrete and steel act together as one cross-section of a member • Mixed – Steel and Concrete members jointly resist forces
- 3. Why Composite and Mixed Structural Systems?
- 4. Dr. Naveed Anwar, CASTED 2018, Manila Innovative Systems Innovative systems needed to balance the Triangle
- 5. Dr. Naveed Anwar, CASTED 2018, Manila Complexity is Increasing – Needing Innovations • Bigger, taller, complex forms, but Lighter, smaller, thinner structural elements • High performance, but Lower cost
- 6. 6 Dr. Naveed Anwar, CASTED 2018, Manila Developing new structural forms and systems Developing Improving the Systems that Already Developed • Improving the materials they are made off • Improving the way they are constructed • Combining materials effectively Improving Innovative and Efficient Systems
- 7. 7 Dr. Naveed Anwar, CASTED 2018, Manila Historical Factors Governing the Selection of Materials for Buildings Structural Properties Construction Cost Fire Protection Construction Time
- 8. 8 Dr. Naveed Anwar, CASTED 2018, Manila Concrete is efficient in compression and steel in tension Concrete encasement restrains the steel against buckling Concrete provides protection against corrosion and fire Steel brings ductility into the structure Composite And Mixed Structures
- 9. Dr. Naveed Anwar, CASTED 2018, Manila Most new Very Buildings are in Concrete and Composites
- 10. Dr. Naveed Anwar, CASTED 2018, Manila Most Tall Buildings in Asian Region
- 11. 11 Dr. Naveed Anwar, CASTED 2018, Manila Composite Construction in Tall Buildings Key Aspects Economical Functionality ArchitecturalFlexibility Assembly
- 12. 12 Dr. Naveed Anwar, CASTED 2018, Manila Advantages for Architectural Aspects Longer spans 01 Thinner slabs 02 More slender columns 03 More innovative opportunities 04
- 13. 13 Dr. Naveed Anwar, CASTED 2018, Manila Reduction of height and corresponding cost Longer spans with the same height - column free rooms Additional stories with the same total height of building Quicker time of erection Economical Aspects
- 14. 14 Dr. Naveed Anwar, CASTED 2018, Manila Assembly Aspects Working platforms of steel decking Permanent formwork Reinforcement of profiled steel sheetings Speed and simplicity of construction Better quality control
- 15. Design Aspects of Composite Construction
- 16. 16 Dr. Naveed Anwar, CASTED 2018, Manila Encased Concrete around Steel Filled Concrete inside Steel Connected Concrete and Steel Connected Concrete Steel Composite – Basic Systems
- 17. 17 Dr. Naveed Anwar, CASTED 2018, Manila Diversity of a Composite Cross-section Design Problem Types of Materials an d their Combinations Types of Actions Location of Reinforcement Stress-Strain Curve Cross-section Shape Design Approach and Method Un-reinforced Concrete Reinforced Concrete Partially Pre-stressed Concrete Fully Pre-stressed Concrete Fiber Reinforced Concrete Steel-Concrete Composite Uniaxial Bending Mx or My only Uniaxial Bending and Axial Force, Mx or My and P Biaxial Bending, Mx and My Biaxial Bending and Axial Force, Mx and My and P Singly Reinforced Doubly Reinforced Arbitrarily Reinforced Simplified Rectangular Block Semi-Parabolic and Full Parabolic Curves Curves for Confined and Unconfined Concrete Linear Elastic Bilinear Elasto-Plastic Elastic, Post Elastic, Strain Hardening Rectangular Circular Flanged General Polygonal Multi Cell Sections Allowable Stress Design (ASD) Ultimate Strength Design (USD) Load Resistance Factor Design (LRFD) Performance Based Design (PBD)
- 18. 18 Dr. Naveed Anwar, CASTED 2018, Manila • Generally, the design of structural members can be divided and categorized in many ways based on ✓type of member ✓type of material ✓type of applied action ✓type of cross-section shape ✓design code, and design method, etc • Often each of these types and their combinations are treated separately and differently for the purpose of determining design strength of members An Integrated Axial Flexural Theory for RC and Composites The Need of an Integrated Theory for the Analysis of Composite Cross-sections
- 19. 19 Dr. Naveed Anwar, CASTED 2018, Manila • It is possible to develop a single theory for determining the axial flexural stress resultants of most types of concrete members for all design methods and for most design codes ✓Unifying Beams and Columns ✓Unifying Reinforced, Pre-stressed Concrete and Composite ✓Unifying WSD and USD Methods ✓Unifying different Cross-section Types ✓Incorporating various stress-strain models Integrated Axial Flexural Theory for RC and Composites
- 20. 20 Dr. Naveed Anwar, CASTED 2018, Manila The Unification of Design Approach for Cross-sections
- 21. 21 Dr. Naveed Anwar, CASTED 2018, Manila Response of Generalized Composite section
- 22. Dr. Naveed Anwar, CASTED 2018, Manila Discretization and Application of General Fiber Approach
- 23. Dr. Naveed Anwar, CASTED 2018, Manila Fiber Model - Equations 23Advanced Concrete l August-2014 Equilibrium equation based on Integration Equilibrium equation based on Summation Expanded Summation for Complex Models === A iiy A iix A iz dAxfMdAyfMdAfN __ ;; _ 1 _ 11 ;; xAfMyAfMAfN n i iiy n i iix n i iiz === === += += += = = == = = == = = == q p l k n j jjj m i yi p y q p l k n j jjj m i xi p x q p l k n j jj m i zi p z xAfMM yAfMM AfNN 1 1 11 3 1 1 11 2 1 1 11 1 1 1 1 Mx xi Ai, fi yi My x y
- 24. 24 Dr. Naveed Anwar, CASTED 2018, Manila Axial-Flexural Response of Composite Cross-sections
- 25. Dr. Naveed Anwar, CASTED 2018, Manila Shear and Torsion Response The shear stress in a flanged section is the highest in the web. However, the total shear force contributed by the flange could be Shear stress in a flanged section The shear force in a concrete-steel composite section is mostly resisted by the shear stress in the steel web. The shear force in a concrete-steel composite section is mostly resisted by the shear stress in the steel web. Shear force in a concrete- steel composite section Torsion Stresses in Steel Tube Filled Concrete
- 26. Dr. Naveed Anwar, CASTED 2018, Manila Typical Guidelines for Composite Design
- 27. 27 Dr. Naveed Anwar, CASTED 2018, Manila Composite Floors and Beams Composite Columns Composite Shear Walls Composite Link Beams Transfer Girders Typical Applications in Tall Buildings
- 28. Composite Decks
- 29. 29 Dr. Naveed Anwar, CASTED 2018, Manila Composite Floors ASCE (2002)
- 30. 30 Dr. Naveed Anwar, CASTED 2018, Manila Taranath, B S (2016) Structural analysis and design of tall buildings: Steel and composite construction CRC press (a) schematic view; (b) section showing equivalent thickness of slab Composite Beam with Deck Ribs Perpendicular to Beam Composite Beam with Deck Ribs Parallel to Beam
- 31. 31 Dr. Naveed Anwar, CASTED 2018, Manila Composite Beam Types Three types of composite beams addressed in the AISC manual: (A) fully encased steel beam; (B) concrete filled HSS; (C) steel beams with mechanical anchorage to slab (1) Steel deck parallel to beam; (2) steel deck perpendicular to beam; (3) cast-in-place slab without steel deck Taranath, B S (2016) Structural analysis and desi gn of tall buildings: Steel and composite constructio n CRC press
- 32. 32 Dr. Naveed Anwar, CASTED 2018, Manila Shear Connectors Key to Composite Decks and Beams Typical shear connector types for steel–concrete composite construction: studs, bars with hoops and channels David Collings (2013) Steel-Concrete Composite Bridges - Designing with Eurocodes, Second edition
- 34. 34 Dr. Naveed Anwar, CASTED 2018, Manila Composite Columns (Design Philosophy and Applications) Peng, L (2014) “Form follows function – The composite construction and mixed structures in modern tall buildings”, International Journal of high-rise buildings, Volume 3, Number 3, pp 191-198
- 35. 35 Dr. Naveed Anwar, CASTED 2018, Manila Advantages of Composite Columns • Increased strength for a given cross-sectional dimension • Increased stiffness, leading to reduced slenderness and increased buckling resistance • Good fire resistance for concrete-encased columns • Corrosion protection for encased columns • Possible economic advantages over either pure steel or reinforced concrete alternatives Taranath, B S (2016) Structural analysis and design of tall buildings: Steel and composite construction CRC press
- 36. 36 Dr. Naveed Anwar, CASTED 2018, Manila Concrete-filled Steel Tubes Efficient Columns
- 37. Dr. Naveed Anwar, CASTED 2018, Manila Axial-flexural Analysis of Concrete-filled Steel Tubes - An Example
- 39. 39 Dr. Naveed Anwar, CASTED 2018, Manila Composite Shear Walls
- 40. 40 Dr. Naveed Anwar, CASTED 2018, Manila Composite Shear Wall Systems Astaneh-Asl A. “Seismic Behavior and Design of Composite Steel Plate Shear Walls.” Steel TIPS Report. Structural Steel Educational Council. Moraga, CA. 2002.
- 41. Dr. Naveed Anwar, CASTED 2018, Manila A Recent Development Of Composite Shear Walls
- 42. Dr. Naveed Anwar, CASTED 2018, Manila Morgen, B., Klemencic, R., and Varma, A. (2018). Core Solution. Modern Steel Construction, February 2018. Concrete-filled Composite Plate Shear Wall (CF-CPSW) Core System
- 43. 43 Dr. Naveed Anwar, CASTED 2018, Manila • The system includes prefabricated wall panels and boundary elements comprised of steel face plates, typically ½ in. thick, separated by 1- in.-diameter cross-connecting tie rods spaced 12 in. on center, both horizontally and vertically, with an overall wall assembly thickness varying from 21 in. to 45 in. • These panels, which include integrally detailed composite (concrete-filled) coupling beams, are rapidly erected at the same pace as the balance of the steel erection. Concrete-filled Composite Plate Shear Wall (CF-CPSW) Core System Morgen, B., Klemencic, R., and Varma, A. (2018). Core Solution. Modern Steel Construction, February 2018.
- 44. 44 Dr. Naveed Anwar, CASTED 2018, Manila • Once the panels are erected and the panel- to-panel connections are made, a self- consolidating concrete mix is placed in the space between the two plates. • The concrete, combined with the steel plates, provides the ultimate strength and stiffness for the core wall assembly as a composite section. Concrete-filled Composite Plate Shear Wall (CF-CPSW) Core System Morgen, B., Klemencic, R., and Varma, A. (2018). Core Solution. Modern Steel Construction, February 2018.
- 45. 45 Dr. Naveed Anwar, CASTED 2018, Manila • Strength and stability of the un-concreted wall panels • Lateral resistance and face plate bracing during the concrete infill • Mechanical connectivity between the steel plates and in-fill concrete for composite action leading to enhanced axial and shear strength • Confined pressure for the concrete for superior seismic performance • Prevention of delamination modes through the plain concrete infill • Out-of-plane shear strength • Reduced slenderness of the steel plates Role of Connecting Tie Rods Morgen, B., Klemencic, R., and Varma, A. (2018). Core Solution. Modern Steel Construction, February 2018.
- 46. 46 Dr. Naveed Anwar, CASTED 2018, Manila Verified Performance Morgen, B., Klemencic, R., and Varma, A. (2018). Core Solution. Modern Steel Construction, February 2018.
- 47. Dr. Naveed Anwar, CASTED 2018, Manila Composite and Mixed System - China
- 49. Dr. Naveed Anwar, CASTED 2018, Manila
- 50. Dr. Naveed Anwar, CASTED 2018, Manila Composite Link Beams
- 51. Some Related Work at AIT
- 52. 52 Dr. Naveed Anwar, CASTED 2018, Manila Comparison of Various Systems
- 53. 53 Dr. Naveed Anwar, CASTED 2018, Manila Design Review of a Composite Tall Building Case Study 1 A Hotel, Dhaka, Bangladesh
- 54. 54 Dr. Naveed Anwar, CASTED 2018, Manila Composite Columns
- 55. 55 Dr. Naveed Anwar, CASTED 2018, Manila Composite Shear Walls
- 56. 56 Dr. Naveed Anwar, CASTED 2018, Manila Composite Floor System
- 57. 57 Dr. Naveed Anwar, CASTED 2018, Manila Composite Beam to Wall Connections
- 58. 58 Dr. Naveed Anwar, CASTED 2018, Manila Structural Peer Review of a Composite Tall Building Case Study 2 A Hotel, Guam
- 59. Dr. Naveed Anwar, CASTED 2018, Manila Finite Element Modeling Linear Elastic Model (ETABS) Nonlinear Model (PERFORM 3D)
- 60. Dr. Naveed Anwar, CASTED 2018, Manila Composite Coupling Beams
- 61. Dr. Naveed Anwar, CASTED 2018, Manila Case -3 Mixed Structure Makati, Philippines Steel Trusses acting as Transfer Systems and roof of large column free spaces
- 63. 63 Dr. Naveed Anwar, CASTED 2018, Manila Concrete and steel are the basic construction materials Reinforced concrete has been a material of choice in Asia Recently, Prestress has become popular in Tall Buildings Future may belong to Composite and Mixed Systems Concluding Remarks
- 64. Thank you View publication statsView publication stats