Reference no: EM132501311
CEN4029-N Advanced Structural Design - Teesside University
Numerical Analysis and Design Report
Learning Outcome 1: Demonstrate a comprehensive knowledge and critical understanding of complex mathematical and computer models relevant to structural design as well as an appreciation of their limitations.
Learning Outcome 2. Interpret knowledge of current practice, relevant to structural design, its limitations and an appreciation of likely new developments.
Learning Outcome 3. Extract and manipulate data pertinent to an unfamiliar problem, and apply its solution using computer based structural engineering tools where appropriate.
Learning Outcome 4. Demonstrate the ability to adapt a wide and comprehensive knowledge of the analytical elements in the application of the structural engineering design processes and their methodologies, to unfamiliar situations.
Learning Outcome 5. Integrate evidence and concepts taken from technical literature and other information sources to solve foreseen and unforeseen structural engineering design problems.
Learning Outcome 6. Apply a critical knowledge of the requirement for structural engineering design activities to promote sustainable development and its impact on wider environmental issues.
Learning Outcome 7. Make informed professional judgements in the application of codes of practice and industry standards used in structural and civil engineering, as well as in the wider engineering context.
Learning Outcome 8. Demonstrate competency in computing skills commensurate with the demands of research/scholarship in structural design.
Learning Outcome 9. Collaborate effectively with others in ways appropriate to the structural engineering profession.
Assignment Brief
Design and the assessment of a multi - storey building with a steel plate shear core using finite element software
You have been asked to design a twenty storey steel building for commercial use, whereby each storey is 3.5 metres high.
It is required by the client to consider a steel plate shear core for resisting the lateral wind loads.
Use a finite element approach with appropriate design software to analyse the steel building for the loading system described below.
The floor layout at every level (including roof) is as indicated in Figure 1. Assume that the minimum column spacing in each direction (and from the steel shear wall) is 6 metres.
Assume a dead load for all the floors, including roof, as 2.5 kN/m2. Appropriate imposed loads should be assumed based on Eurocode 1 (EN1991 Part 1.1)
Other assumptions:
1. The steel plate of the shear core is 15 mm thick, which is known to be adequately stiffened and braced against buckling.
2. A uniform horizontal wind load of 2.0 kN/m2 acts simultaneously on the front and a side elevation of the building.
3. The shear core base is fixed continuously to the underlying foundations.
4. Beams are pinned - connected to the columns.
Part A: Submit an individual report, addressing the following:
Assessment Task 1: Perform a preliminary design of the steel columns and beams of the building assuming: (1) only two different column section sizes along the height of the building and (2) a composite steel- concrete slab.
Assessment Task 2: Build a numerical model for the steel core of the multi-storey building using SpaceGass software and verify its accuracy. Proof of this verification must be included in the report and should include support reactions, displacement and stresses.
Assessment Task 3: Check whether a 15mm thickness for the steel plate of the core satisfies the ultimate limit state design. Consider appropriate load combinations with simultaneous actions of two variable loads (wind and imposed loads). Make a discussion on the value of the maximum von Mises stresses appearing in the steel plate and state where these occur. Assume that a steel grade S355 was used for the shear core. Investigate if the 15mm plate thickness is sufficient to limit the deflection at the top of the building below a maximum allowable of H/400, where H is the total height of the building. What would be an optimised steel plate thickness to satisfy ‘exactly' the serviceability limit state deflection?
Part B: Work in groups to produce a PowerPoint presentation addressing the following question.
Assessment Task 4: Suggest a suitable foundation system for the steel shear core and justify your selection with
appropriate literature references.
Figure 1: Plan view of the proposed office building
Addendum - alternative coursework option for the use by students having issues accessing software
Assessment Task 1:
Perform a preliminary design of the steel columns and beams of the building assuming: (1) only two different column section sizes along the height of the building and (2) a composite steel- concrete slab.
Assessment Task 2:
Produce a hand calculation to check whether a 15mm thickness for the steel plate of the core satisfies the ultimate limit state design. Consider appropriate load combinations with simultaneous actions of two variable loads (wind and imposed loads). Make a discussion on the value of the maximum von Mises stresses appearing in the steel plate and state where these occur. Assume that a steel grade S355 was used for the shear core. Investigate if the 15mm plate thickness is sufficient to limit the deflection at the top of the building below a maximum allowable of H/400, where H is the total height of the building. What would be an optimised steel plate thickness to satisfy ‘exactly' the serviceability limit state deflection?
For this Assessment Task you can make the following assumptions:
• Assume all wind loads (in the front and side elevation of the building) are resisted by the
steel-plated shear core only.
• Assume the steel shear core as a fixed cantilever with a steel square hollow section.
• Ignore possibility of buckling of the steel plates of the shear cores.
Assessment Task 3:
Please carry out a detailed literature review in response to each of the questions given below:
• Describe possible problems associated with the structural response of steel shear walls under lateral loads when they are used as lateral-force restraining systems.
• How can these problems be tackled in practice?
• What do we need to consider in order to predict numerically the actual behaviour of steel shear walls in practice? Provide examples of software that can be used for this purpose.
Make sure that you cite and list your references appropriately (in accordance with Teesside Harvard referencing system). For the question on software, references can be in the form of website. For the other questions, the expected nature of literature is journal papers, conference papers, textbooks, standards, documents from industry etc
Part B: Work in groups to produce a PowerPoint presentation addressing the following question.
Assessment Task 4:
Suggest a suitable foundation system for the steel shear core and justify your selection with appropriate literature references.
Attachment:- Advanced Structural Design.rar