Design ultimate bending moment one-way spanning slab

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SUMMARY

The discussion focuses on calculating the design ultimate sagging and hogging bending moments for a one-way spanning slab with specified loads. The slab has an imposed load of 32 kN/m and a permanent load of 39 kN/m, spanning 5 meters with a thickness of 0.175 meters. The ultimate moment is determined by multiplying the design load moment by code overload factors and strength factors for both dead and live load cases. The conversation references Eurocodes and emphasizes the need to consider different load patterns and factors to accurately compute the required moments.

PREREQUISITES
  • Understanding of structural engineering principles
  • Familiarity with Eurocode standards
  • Knowledge of bending moment calculations for slabs
  • Proficiency in load transformation from kN/m to kN/m²
NEXT STEPS
  • Study Eurocode design principles for one-way slabs
  • Learn about load combinations and factors in structural design
  • Explore beam tables for calculating maximum moments in multi-span beams
  • Research methods for transforming line loads to area loads in structural analysis
USEFUL FOR

Civil engineers, structural designers, and students specializing in structural analysis and design of slabs will benefit from this discussion.

warrio1010
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Homework Statement


Find the design ultimate sagging and hogging bending moments per metre width of slab.

Load on slab- Imposed 32 kN/m
- Permanent 39 kN/m
Length: 5m
Depth: 8m
Thickness: 0.175m

Not sure if relevant but it has 2 spans (i.e. two 5m lengths of slab) but it is a ONE-WAY SPAN.


Homework Equations





The Attempt at a Solution


Tried WL/8 but then realized that is just for the moment and not the design ultimate moment.

Thanks for your help.
 
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The ultimate moment is the design load moment multiplied by code overload factors and strength factors applied for the dead and live load cases. I asume you can use beam tables for a beam on 3 supports to find the max positive moment between supports and the max negative moment at the middle support.
 
The language used in the question is reminiscent of eurocodes. You need to consider the different factors applied to permanent, dead and imposed loads, and then patterned loading in two diffrent load cases to get the moments you need. Do you know what I am talking about? When you say 'depth', do you mean 'width'? How do the loads given in kN/m transform into kN/m2 ?
 

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