TB-Lecture13-Floor-Systems

TB-Lecture13-Floor-Systems - EGN-5439 The Design of Tall...

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EGN EGN -5439 The Design of Tall Buildings 5439 The Design of Tall Buildings Lecture 13 Lecture 13 Floor Systems for Tall Buildings © L. A. Prieto-Portar - 2008
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Outline Floor Systems – Reinforced Concrete Framing: 1. One-Way Slabs on Beams or Walls 2. One-Way Pan Joists and Beams 3. One-Way Slabs on Beams and Girders 4. Two-Way Flat Plates 5. Two-Way Flat Slabs 6. Two-Way Waffle Flat Slabs 7. Two-Way Slabs and Beams. Floor Systems – Steel Framing: 1. One-Way Beam System 2. Two-Way Beam System 3. Three-Way Beam System 4. Composite Steel-Concrete Floor Systems.
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Floor Systems. The choice of a correct floor system is an important economic decision in a tall building. In residential buildings , shorter spans are possible because smaller apartment units permit the placement of closer spaced columns and walls. In contrast to residential buildings, modern office buildings require large open spaces, sometimes entire areas must be devoid of structural elements. The ease and speed of construction also plays a role in the selection of the floor system. Some contractors may only be familiar with certain types of systems, or may have invested in expensive formwork for a particular type. The floor system may be required to assist in carrying horizontal loads , in which case a floor slab may have to be replaced by a floor plate .
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Reinforced Concrete Floor Systems: Reinforced concrete floor systems are grouped into two categories: One-way slabs , in which the slab spans in one direction between supporting beams or walls. Two-way slabs , in which the slab spans in orthogonal directions. Both systems take advantage of continuity over interior supports by providing negative moment reinforcement in the slab.
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span continuously over walls or beams up to 24 feet apart. These slabs are 7 to 8 inches thick, and require simple formwork, with simple reinforcement. They are suitable for flying formwork to speed up construction. This system is heavy and
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This note was uploaded on 08/29/2011 for the course CES 4600 taught by Professor Staff during the Fall '08 term at FIU.

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TB-Lecture13-Floor-Systems - EGN-5439 The Design of Tall...

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