Dead and Live Loads Question

  • Thread starter kedwardr
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In summary, the conversation discusses a 6-storey concrete office building in North Vancouver, British Columbia, Canada with a ductile concrete shear wall lateral force resisting system. The storey height is 4 meters and the building is located in site class B soil conditions. The dead load and live load of the typical floor and roof need to be determined based on the provided sections and intended usage. The earthquake load, including base shear and floor-by-floor shear, needs to be calculated assuming a seismic weight of 100% of dead and live loads, and considering cladding loads while neglecting the self-weight of columns and shear walls. The necessary load combinations for design, including snow, rain, and wind, also need to be determined. It
  • #1
kedwardr
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The following 6‐storey (5 elevated floor and roof) concrete office building is located in North Vancouver, British Columbia, Canada, where the soil condition is site class B. The lateral force resisting system is ductile concrete shear walls with Rd = 3.5 and Ro = 1.6. The storey height is 4 meters. Please determine:
(a) Dead load of typical floor and roof based on the provided sections.
(b) Live load of typical floor and roof based on the intended usage.
(c) Earthquake load, both base shear and floor‐by‐floor shear, assuming seismic weight is
100% of dead and live loads. Include cladding loads, and neglect self‐weight of columns
and shear walls.
(d) All load combinations needed for design including snow,rain,and wind.

Can anyone suggest me on where to start? I am kind of stuck on how you break down step by step. This is much more complicated than the problems presented in Structural Analysis by RC Hibeller.

The cross sections for the roofs and ceiling are given below. However, I am not too sure what the bigger drawing is. Maybe anyone can help me point out?

THANKS!
K
 

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  • #2
You need to look in the section of your book that discusses design loads. They want you to properly assign loads per the required building code.

The bigger drawing is a floor plan, basically a top view where they're showing the locations of the columns and walls in the building.
 
  • #3
The difference between this design question and a typical structural analysis question is that not all the information is given. You have to make assumptions. It would be better to try to answer the question completely in 1 hour and then determine which assumptions made could be refined, rather than try to get every word and line absolutely correct as you go along. For example you might assume initially that floors dead and live load add up to 10 kN/m2. That may or may not be right, but it does get you somewhere vaguely right, and that is better than going nowhere at all.
 

1. What are dead and live loads?

Dead and live loads are types of forces that act on a structure. Dead loads are constant or fixed forces that are always present, such as the weight of the building itself, while live loads are temporary or variable forces that may change in magnitude and location, such as people, furniture, or wind.

2. Why is it important to consider dead and live loads in building design?

It is important to consider dead and live loads in building design because they directly affect the structural integrity and safety of the building. Failure to properly account for these loads can result in structural damage or collapse.

3. How do you calculate dead and live loads?

Dead and live loads can be calculated by determining the weight or force of each individual component or element of the structure and summing them up. This includes the weight of the building materials, as well as the estimated weight of any occupants, furniture, and equipment.

4. What is the difference between dead and live loads?

The main difference between dead and live loads is that dead loads are permanent and unchanging, while live loads are temporary and variable. Dead loads are always present and do not depend on external factors, while live loads can vary in magnitude and location.

5. How can dead and live loads be reduced?

Dead loads can be reduced by using lightweight building materials or minimizing the amount of materials used. Live loads can be reduced by limiting the number of people or amount of furniture in a space. Proper design and maintenance can also help to evenly distribute and balance the loads on a structure, reducing the overall stress on the building.

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