EG7005 Design in Steel and Concrete
Question:
Requirements:
1. A new factory with storage and office facility to be built on a vacant site.
2. The floor to the factory, Level 2, is to be 1.5m above the external ground level, Level 1. The clear internal height required within the factory is 10.0m and the floor area is to be column free. The client requires six delivery doors to the factory each 5.0m long x 5.0m high equally spaced along the West elevation.
3. The storage floor areas are to have a clear internal floor to floor height of 4.0m and are to be column free. Two access cores each measuring 8.0m x 4.0m are required within the storage floor plan areas.
4. The office area is to be column free and is to have a clear internal height of 2.8m.
5. The perimeter of the factory and the storage facility is to be clad with composite metal panels with the columns at a minimum spacing of 6.0m. The walls to the office are to be clad with glass curtain walls with the columns at a minimum spacing of 6.0m.
Site conditions
The site is level and located on the outskirts of a large city. Basic wind speed is 40m/s based on a 3 second gust; the equivalent mean hourly wind speed is 20m/s. Ground conditions:
a) Ground level – 2.0m Made ground
b) 2.0m – 5.0m Sand and gravel N = 15
c) 5.0m – 8.0m Stiff to very stiff clay C = 250kN/m2
d) Below 8.0m Rock, allowable bearing pressure 1500kN/m2
e) Ground water was encountered at 4.0m below ground level.
Log Book
• Each group is required to keep a Log Book, giving a brief summary of weekly key activities undertaken by each team member (please use template provided). The Log Book must be submitted at the back of the Final Report. Design Data
• The verification of structural viability should be carried out in accordance with current Eurocodes. Always clearly refer the documents used in support of calculations (use the Ref. column on the calculation pad to refer to Eurocodes’ clauses used).
• Clearly state the main assumptions used in your calculation, preferably using a list at the beginning of your calculation. Use calculation sheet template provided.
• Loading data should be from the relevant design codes and/or using reasonable assumptions.
Explain how this formula may be modified to take account for different states of bending moment distribution and give the increase in Mcr if the only change from basic problem is for the load to be uniformly distributed over the whole span of the beam.
Explain how this modified formula may be used to account for the load being destabilising and give, in notation form, the variable that would be used when the compression flange is laterally restrained, the beam is fully restrained against torsion and conditions of restraint at the ends of the beams is for both flanges free to rotate on plan.
