CIVE1177: Concrete Structures Project Brief 1

Project Brief

This project will introduce you to the aspects of the structural design process of a building made from reinforced concrete. You need to design a three-storey building, and the specifications of the building are as follows:

Specification

• Loading:
  • Waterproofs (roof) 0.6 kN/m2
  • Floor Finishes (internal levels) 1.1 kN/m2
  • Partitions (internal levels) 0.5 kN/m2
  • Ceiling and services (both roof and internal levels) 1.2 kN/m2
  • Exterior Wall (along gridline 4 only, internal levels) 4.0 kN/m (100 mm thick)
  • Live Load 1.0 kN/m2 (roof) 3.0 kN/m2 (internal levels)
• Permissible soil-bearing pressure
  • 200 kN/m2 if the last digit of student number is 0
  • 220 kN/m2 if the last digit of student number is an odd number
  • 240 kN/m2 if the last digit of student number is an even number
• Characteristic concrete strength ???????? ′ = 45 MPa
• Concrete cover thickness = 25 mm • Ductility class N high yield reinforcement for both longitudinal steel and shear reinforcement. Yield strength ???????????? = ????????????,???? =500 MPa
  • Maximum bar length = 6 m 
  • 10 mm < bar>
• Slab thickness = 200 mm (the 3 span slab runs one-way over the beams that run along gridlines A, B, C, and D) 
• Beam width = 325 mm. The overall beam depth is (550+x) mm. x = last digit of student number×10
• Beams are located at 5.0 m centre-to-centre. The beams run along gridlines A, B, C and D (see Figure 1)
• Column section to be 325 x 325 mm square, pin connected to footing.
• The structure has a floor structure on level 1 and level 2, plus a roof structure, and the ground floor slab is not supported by the columns but rests on the ground soil. The frame is assumed to be braced against lateral load (i.e. do not need to consider lateral loads such as wind loads in this project)

Scope of Work

You will be required to complete the following tasks:

1. Draw the framing plan for level 2, including gridlines and dimensions, proper marking and labelling of each element, indication of slab type, i.e. one-way or two-way.
2. Estimate primary loads and determine load combinations for strength and serviceability limit states. Use the load information provided in this project brief.
3. Model and analyse the RC frame structure at gridline B using SpaceGass for appropriate load combinations. Different load arrangements shall be considered, and the design envelopes shall be generated for bending moment, shear force and axial force.
4. Design the RC structures: (1) the continuous one-way slab from gridline A to D, (2) the RC continuous beam at gridline B, (3) one RC column at grid B/2 including the pad footing. Detailed and complete design calculation and selection of reinforcement shall be provided.
5. Draw the RC sketch drawings of the above designed elements. Detailing shall be provided based on the requirements in AS3600.

Assessment Summary

This project assessment required students to apply the principles of reinforced concrete (RC) structural design to a three-storey building. The task simulated a real-world scenario, integrating analytical, technical, and practical design aspects aligned with AS3600: Concrete Structures Standard.

Key Requirements of the Assessment:

1. Preparation of Structural Layout:

   • Develop a detailed framing plan for Level 2 showing gridlines, beam and column locations, and slab type (one-way or two-way).

2. Load Estimation & Combination:

   • Calculate dead, live, and imposed loads using the given data (e.g., finishes, partitions, ceiling, and services).
   • Determine appropriate load combinations for both Strength Limit State (SLS) and Serviceability Limit State (SLS).

3. Structural Modelling and Analysis:

   • Model the RC frame structure along gridline B in SpaceGass.
   • Analyse bending moments, shear forces, and axial loads under different load combinations.

4. Design of Key Structural Elements:

   • Design the following elements based on results:
     • One-way slab (gridline A–D)
     • RC beam (gridline B)
     • RC column at grid B/2
     • Pad footing under the column
   • Provide reinforcement detailing in accordance with AS3600 standards.

5. Drawing and Documentation:

   • Prepare sketch drawings of the designed members, including reinforcement detailing and notations for practical interpretation.

Mentor-Guided Step-by-Step Approach

The academic mentor guided the student throughout the process in a structured, iterative manner to ensure that each design stage aligned with engineering principles and professional documentation standards.

Step 1: Understanding the Project Brief

The mentor began by helping the student interpret the project brief, focusing on:

• Understanding design scope and load parameters.
• Clarifying building geometry, gridline locations, and connection assumptions.
• Explaining ductility class, material strengths, and cover requirements as per AS3600.

This foundation allowed the student to frame the overall design intent clearly before moving into calculations.

Step 2: Developing the Framing Plan

Next, the mentor guided the student in:

• Drawing the Level 2 framing plan using AutoCAD or manual drafting tools.
• Accurately marking gridlines A–D and 1–4, indicating slab type (one-way) and span directions.
• Labeling beams, columns, and slab sections for reference in later calculations.

This ensured the student could visualize the structure before performing any load or analysis work.

Step 3: Load Assessment and Combination

Under mentor supervision, the student:

• Compiled dead load data (from finishes, partitions, ceilings, and external walls) and live load data from the given specification.
• Calculated factored loads using AS1170 load combination principles.
• Differentiated between strength design and serviceability checks, forming a strong link between theory and practice.

Step 4: Structural Analysis Using SpaceGass

The mentor then instructed the student to:

• Model the RC frame along gridline B in SpaceGass, defining member properties, boundary conditions, and load cases.
• Conduct analysis to obtain bending moment, shear force, and axial force diagrams.
• Generate design envelopes for all critical sections, interpreting them correctly for design input.

This stage emphasized practical digital analysis skills essential for modern structural engineers.

Step 5: Reinforced Concrete Design

The student, with mentor feedback, designed:

• The one-way slab using standard moment and shear coefficients.
• The beam at gridline B, determining effective depth, reinforcement area, and bar spacing.
• The column at grid B/2 for axial and bending interactions using design charts and equations.
• The pad footing, ensuring soil bearing capacity compliance based on permissible pressures.

At each sub-stage, the mentor reviewed calculation methodology, safety factors, and code compliance.

Step 6: Reinforcement Detailing and Drawings

The mentor emphasized:

• Preparing clear reinforcement sketches with all essential notationsbar sizes, spacing, hooks, laps, and cover.
• Ensuring compliance with AS3600 detailing standards.
• Highlighting constructability and clarity for real-world site interpretation.

Step 7: Review, Refinement, and Reflection

Finally, the mentor helped the student:

• Review the overall design for accuracy and consistency.
• Reflect on areas of improvement, particularly around load interpretation, structural modelling accuracy, and code referencing.

This review reinforced the student’s understanding of structural design workflows.

Outcome and Learning Achievements

Through this guided process, the student successfully achieved the following outcomes:

• Comprehensive understanding of reinforced concrete design principles.
• Application of AS3600 code provisions in practical design scenarios.
• Hands-on proficiency in using SpaceGass for frame analysis and interpretation of design outputs.
• Ability to integrate structural detailing and documentation as per professional standards.
• Development of critical thinking and problem-solving skills relevant to load analysis and reinforcement selection.

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