EGB 375 - DESIGN ASSINGMENT

Design of Concrete Structures - According to Australian Concrete Standards (AS3600-2018)

Name : Darcy Marnane

ID Number : n9216570

Beam Cross-Section :

Dimensions and Properties

Unit Weight of Concrete

Beam Loading:

Permanent dead load of terrace slab onto the beam

Permanent dead load of terrace fall, and flooring onto the beam

Permanent dead load of safety railing onto the beam

Imposed live load onto the beam

1. Draw the beam elevation schematically supported on columns with span length and the loading on top.

Assuming - Column Sizes of 250x250mm.

2. Determine the self-weight of the beam in kN/m

3. Determine the magnitude of the ultimate design load w*

Assuming - Permanant and Imposed Actions Govern the ULS Design Load

AS 1170.0 : 2002 Clause 4.2.2

4. Determine the design bending moment M*

Table 1

Note : For simply supported beams with an applied UDL, the maximum bending moment, M*, and Maximum Deflection, δ, can be calculated using the formula provided in Table 1

5. Determine the short-term bending moment, Ms*

From AS1170.0 - Clause 4.3 - Combinations of Actions for Sevicibility Limits and table 4.1

Short term load

Maximum Short term Bending Moment

6. Determine the long-term bending moment, M*sus

From AS1170.0 - Clause 4.3 - Combinations of Actions for Sevicibility Limits and table 4.1

7. Determine the area of steel required for the calculated M*

Capacity reduction factor (AS3600 Table 2.2.2)

Assuming Tension Steel has Yeilded.

Assuming 16mm Diamter Steel Bars

Steel and Section Properties:

Characteristic Yeild Strength of Steel Reinforcment

Diameter of Reinforcement

Effective Depth of Cross Section

Equation 8.1.3(1) - AS3600

Equation 8.1.3(2) - AS3600

Design Moment Capacity

Calculating the Depth of Neutral Axis, in terms of Ast

C = T

C =

T =

Rearranging to solve for dn

alpha2 and gamma are unitless in this equation

Solving for A.st by considering,

Rearranging to solve for Ast