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RCD3700 Project Solutions Semester 1 2024

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  • Course
  • Reinforced Concrete Design IV (RCD3700)
  • Institution
  • University Of South Africa (Unisa)

This paper contains RCD3700 (Reinforced Concrete Design IV) project 2024. All structural elements (slabs, beams, columns and footing) were designed to SANS10100. DISTINCTION GUARANTEED

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  • June 14, 2024
  • 56
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • rcd3700 project solutions semester 1 2024

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  • University of South Africa (Unisa)
  • Reinforced Concrete Design IV (RCD3700)
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Reinforced Concrete Design IV

Design Project

Semester 1 2024




0027 65 934 4052

,TABLE OF CONTENTS



1.0 INTRODUCTION........................................................................................................................... 3

1.1 SCOPE OF THE PROJECT ......................................................................................................... 3

2.0 STRUCTURAL LAYOUTS ........................................................................................................... 3

3.0 DESIGN OF STRUCTURAL ELEMENTS ................................................................................. 7

3.1 SLAB DESIGN ............................................................................................................................. 8

3.2 BEAM DESIGN ......................................................................................................................... 15

3.3 COLUMN DESIGN.................................................................................................................... 20

3.4 FOOTING DESIGN ................................................................................................................... 22

4.0 SOFTWARE APPLICATION ..................................................................................................... 23

4.1 SLAB DESIGN ........................................................................................................................... 23

4.2 BEAM DESIGN ......................................................................................................................... 25

4.3 COLUMN DESIGN.................................................................................................................... 32

4.4 FOOTING DESIGN ................................................................................................................... 44

,1.0 INTRODUCTION


Structural building engineering is primarily driven by creative manipulation of materials and
forms and the underlying mathematical and scientific ideas to achieve an end that fulfils its
functional requirements and is structurally safe when subjected to loading.



1.1 SCOPE OF THE PROJECT
The project focuses on analysis and design of a three -storey office building. The method to be
used in this project is Limit State Design and it involves estimating the subjected loads on a
structure, choosing the sizes of members to check, and selecting the appropriate design criteria.
Limit state design requires that two principal criteria are satisfied: Ultimate limit state and
Serviceability limit state.

2.0 STRUCTURAL LAYOUTS

,
,
,
,3.0 DESIGN OF STRUCTURAL ELEMENTS


Design Data
Concrete self –weight = 24 kN/m2
Imposed load = 3.0 kN/m2

Finishes =1.5 kN/m2

Characteristic strength of concrete fcu = 30 MPa

Bearing capacity of soil = 150 kPa

Reinforcement bars: fy = 450 MPa

:fyv = 250 MPa

Cover = 25 mm (Slabs, beams and columns),

= 50mm (Foundation)

, 3.1 SLAB DESIGN


SANS10100 Consider panel C D 3 4

Loading

Self – weight of slab = 24 x 0.2 = 4.8 kN/m2

Dead load =4.8 + 1.5 = 6.3 kN/m2

n = (1.2 x 6.3) + (1.6 x 3) = 12.36 kN/m2

Aspect ratio ly/lx =5500/3850 = 1.4

This is a two – way spanning slab


4.4.4 Bending moments, 𝒎𝒔 = 𝜷. 𝒏. 𝒍𝟐𝒙

Table 15 Moment coefficients and bending moments

Short span direction

Mid span: m = 0.039 x 12.36 x 3.85 2 = 7.15 kN/m2

Support: m = -0.050 x 12.36 x 3.85 2 = -9.16 kN/m2


Long span direction

Mid span: m = 0.024 x 12.36 x 3.85 2 = 4.40 kN/m2

Support: m = -0.032 x 12.36 x 3.85 2 = -5.86 kN/m2

Assume use of Y16 bars, d = 200 – 25 -16/2 = 167 mm

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