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KING FAHD UNIVERSITYCIVIL ENGINEERING DEPARTMENT

A New Prefab Panel As a flooring slab

Web Grid Core Panel

ABDUL FATTAH DARWISH

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Subjects

The Problem ? Panel Description Structural Study Economical Study Comparison conclusion

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Problems ? High Dead Loads in buildings ?

D/L ≥ 2 In ordinary buildings D/L = 1 In Hollow Core Slab ?

Construction Cost & Time Slab Cost @70% of Skelton Slab Time @ 75% of Skelton Time

Earthquake Disasters Mass & Height

Environmental Impacts of Concrete Roads & Crushing Plants Problems

Energy Loss

Crushing Plants,Transportation & Construction

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Panel Description

Components Web Grid Core Cladding Plats Filling Material Connecting Devices

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Panel Description

Strength Points Very Light : 10% of concrete Weight Very strong : 50 cm for 20x20 m Could be one or two way slab action Reduce @ 50% of Building Weight Reduce @20% of skeleton cost Reduce construction time Reusable,Removable and adjustable Easy to transport & install

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Panel Description

Improving points Water Proofing Fire & Heat Resistance Electric Conductivity Sound Resistance Connecting Devices

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Data Dimensions are: 6 x 6 x 0.20 meter Pinned supports all around All elements are 1.5 mm thick. Total load is 300 kg/m2

Results Max. stress is 0.15 t/cm2 Max Deflection 1.0 mm

Structural Study

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Stress isometric

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Top Plate Stress 0.15 t/cm2

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Bottom Plate Stress 0.13 t/cm2

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Central Rib Stress 0.13 t/cm2

Deflection is 1mm

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Data: 10 floors building Floor area 12X12 m Current prices for ribbed slab Result: 20 % Reduction in skeleton cost

if we use the new panel

Economical study

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Comparison against:

Solid Slab Ribbed Slab Hollow Core Slab Siporex

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Deflection

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

Solid slab Ribbed Hollowcore Siporx WGCP

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Density (t/m3)

0

0.5

1

1.5

2

2.5

Solid slab Ribbed Hollowcore Siporx WGCP

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Cost (SR/m3)

0

200

400

600

800

1000

1200

Solid slab Ribbed HollowCore

Siporx WGCP

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Installing Time (day)

0

2

4

6

8

10

12

14

16

Solid Ribbed H.core Siporx WGCP

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Manufacturing Time (weeks)

0

1

2

3

4

5

6

7

8

Hollow core Siporx WGCP

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Achievements

Load Reduction (> 50%) Cost Reduction (>20%) Saving Victims in earthquakes Environmental Benefits Energy Savings

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Conclusion It has strength points It has improving points A Feasibility study should be done

to ensure : Performance Manufacturing Use & Cost

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Questions