Reference no: EM132746989
Unit 20 Principles of Structural Design - Higher National Certificate/Diploma in Construction and the Built Environment
Assignment - Principles of Structural Design for Structural Elements of a Building
Learning Outcome 1: Calculate bending moments and shear forces for simply supported steel and concrete beams.
Learning Outcome 2: Determine deflection for simply supported beams.
Learning Outcome 3: Calculate the axial load carrying capacity of steel and reinforced concrete columns.
Learning Outcome 4: Explore design methods for steel/ reinforced concrete beams, slabs and columns
Assignment Brief
Assignment is based on the design of flexural and compressive structural elements of a building. Student should be able to understand the given scenario and apply the structural design principles to solve the given problems.
Task 1
Suppose you are the structural design engineer assigned for the proposed shopping complex project located at Colombo suburb. The proposed shopping complex is a two-storey building. The plan view and the front elevation view of the building are shown in Figure 1 and Figure 2, respectively. Depending on a requirement from the client party, a part of the structure is to be built using reinforced concrete and the other part is to be built using structural steel.
Figure 1: Plan view of the shopping complex
a) Discuss the statutory requirements to ensure safety in structural designs.
b) Produce valid factors of safety for live loads, dead loads and imposed loads using current codes of practice and building regulations.
c) Determine the bending moment and shear force diagrams with appropriate calculations for steel beam 5 (B4) if the dead and live loads on each slab panels are 5.5 kN/m2 and 4.0 kN/m2 respectively. Redo the calculation if the above beam is loaded with a point load of 5 kN instead of the above slab panel. Specify clearly the assumption you make.
d) Evaluate how maximum bending moments determine steel beam selection using current codes of practice and approved documents in terms of economics and safety. Consider the section designation and the design strength (Py) of the above rolled I section are 406 x 178 x 85, and 275 N/mm2respectively.
e) Determine deflection in the above simply supported steel beams with the given point load and the uniformly distributed load due to the given slab panel in part (c) making necessary assumptions.
f) Explain how the deflection in beams affects structural stability.
g) Analyse different support methods and their effect on deflection in fixed structures.
h) Describe the concepts of slenderness ratio and effective length.
i) Determine the axial load carrying capacity of steel columns and reinforced concrete columns for following scenarios of the above building.
i. If the design strength (Py) and the slenderness (λ) of the UC section of size 254 x 254 x 167 mm, is 275 N/mm2 and 40 respectively determine the axial load carrying capacity (Pc) of the steel columnC4. Consider the gross sectional area of the UC section as 213 cm2.
ii. Determine the load carrying capacity of the reinforced concrete column C1 after selecting a suitable size.
j) Analyse the load carrying capacity, size, weight and corrosion resistance properties of different materials used for beams and columns in fixed structures.
k) Assess the most effective support method for the above given scenario, in terms of ease and speed of construction, economics, safety and environmental factors.
l) Produce drawings and specifications in support of a structural design solution
m) Evaluate the use of an alternative material in achieving a design solution, discussing the benefits or challenges associated.
n) Assess the use of Building Information Modelling in the production of an accurate structural design.