TABLE OF CONTENTS
TYPICAL OFFICE FLOOR ....................................................................................................... 4
PART I
... [Show More] – SCHEMATIC DESIGN AND PRESTRESSING ..................................................... 4
INTRODUCTION ...................................................................................................................... 4
1. COLUMN LAYOUT .............................................................................................................. 4
1.1. Schematic Diagrams of Two Main Options for Column Layout ..................................... 4
1.2. Likely Advantages and Disadvantages of Each Grid Option .......................................... 4
2. PRETRESSED BEAM AND ONE WAY SLAB – SCHEMATIC DESIGN OF BEAM AND
SLAB SIZE ................................................................................................................................. 6
2.1. Initial Beam and Slab Depth Calcuations ....................................................................... 6
2.1.1. Option 1 .................................................................................................................... 7
2.1.2. Option 2 .................................................................................................................... 7
2.2. Member Sizes in a Typical Bay Schematic Diagrams ..................................................... 7
2.3. Comparable Designs ........................................................................................................ 7
2.3.1. Option 1 .................................................................................................................... 7
2.3.2. Option 2 .................................................................................................................... 7
3. CONCEPTUAL DESIGN OF THE AMOUNT OF PRESTRESS FOR TYPICAL SPANS .. 8
3.1. Total self-weight dead load (slab + beam) carried by an individual band beam ........... 8
3.2. AMOUNT OF PRE-STRESS FORCE ‘T’ REQUIRED ..................................................................... 8
3.3. NUMBER OF STRANDS REQUIRED ........................................................................................... 8
4. STRENGTH CALCULATIONS ............................................................................................ 8
5. COST ESTIMATES .............................................................................................................. 14
5.1. Option 1: ........................................................................................................................ 14
5.2. Option 2: ........................................................................................................................ 16
PART II – COMPOSITE STEEL ............................................................................................. 17
6. STEELWORK FLOOR DESIGN ......................................................................................... 17
6.1. Schematic Diagrams ...................................................................................................... 17
6.2. Beam Size Approximations ............................................................................................ 17
6.2.1. Option 1 .................................................................................................................. 17
6.2.1.1. TABULATED METHOD: .................................................................................................... 17
6.2.1.2. STRENGTH APPROXIMATION METHOD 1: ......................................................................... 20
3
6.2.1.3. STRENGTH APPROXIMATION METHOD 2: ......................................................................... 21
6.2.1.4. STRENGTH APPROXIMATION METHOD 3 – SPAN/DEPTH RATIO: ....................................... 22
6.2.2. Option 2 .................................................................................................................. 22
6.2.2.1. TABULATED METHOD: .................................................................................................... 22
6.2.2.2. STRENGTH APPROXIMATION METHOD 1: ......................................................................... 22
6.2.2.3. STRENGTH APPROXIMATION METHOD 1: ......................................................................... 23
6.2.2.4. STRENGTH APPROXIMATION METHOD 3 – SPAN/DEPTH RATIO: ....................................... 24
6.3. Beam Size Summary ....................................................................................................... 25
6.4. Cost Estimations ............................................................................................................ 25
6.4.1. Option 1 .................................................................................................................. 25
6.4.2. Option 2 .................................................................................................................. 26
7. PROVISION FOR BUILDING SERVICES ......................................................................... 27
8. CONCLUSION - P/T CONCRETE VS COMPOSITE STEEL DESIGNS .......................... 36
REFERENCES ......................................................................................................................... 40 [Show Less]