06/17/2017

Calculating the Design Moment Strength and the Position of the Neutral Axis of a Single Reinforced T-section with Compression in the Flange and Web

06/17/2017

Calculating the Design Moment Strength and the Position of the Neutral Axis of a Single Reinforced T-section with Compression Only in the Flange

In this post, I will go over the ninth reinforced concrete example in our structural reinforced concrete design course covering the design and analysis of flexural beam members. The goal of this reinforced concrete design example is to calculate the design moment strength and the position of the neutral axis of a single reinforced T-section with compression only in the flange per ACI Code 318-11.

 

The problem statement states,

 

A series of simply supported concrete beams have a span length of 16 ft and are spaced at 8 ft. They support a 4 in. thick concrete floor slab. The dimensions and beam reinforcement are shown in the figure below.

 

If f’c = 3 ksi and fy = 60 ksi, calculate the design moment strength of a typical interior beam per ACI 318-11.

 

06/17/2017

Calculating the Design Moment Strength and the Position of the Neutral Axis of a Rectangular Section with Compression Reinforcement that Does Not Yield

In this post, I will go over the eighth reinforced concrete example in our structural reinforced concrete design course covering the design and analysis of flexural beam members. The goal of this reinforced concrete design example is to calculate the design moment strength and the position of the neutral axis of a rectangular section with compression reinforcement that does not yield per ACI Code 318-11.

 

The problem statement states,

 

The rectangular section below has the following properties:

 

Width = b = 12″
Effective depth = d = 22.5″
Tension reinforcement = (6) no. 9 bars
Compression reinforcement = (3) no. 7 bars

 

Calculate the design strength of the beam if f’c = 5 ksi and fy = 60 ksi using ACI Code 318-11.

 

06/17/2017

Calculating the Design Moment Strength and the Position of the Neutral Axis of a Rectangular Section with Compression Reinforcement that Yields

In this post, I will go over the seventh reinforced concrete example in our structural reinforced concrete design course covering the design and analysis of flexural beam members. The goal of this reinforced concrete design example is to calculate the design moment strength and the position of the neutral axis of a rectangular section with compression reinforcement that yields per ACI Code 318-11.

 

The problem statement states,

 

The rectangular section below has the following properties:

 

Width = b = 12″
Effective depth = d = 22.5″
Tension reinforcement = (6) no. 9 bars
Compression reinforcement = (2) no. 6 bars

 

Calculate the design strength of the beam if f’c = 4 ksi and fy = 50 ksi using ACI Code 318-11.

 

06/17/2017

Calculating the Design Moment Strength and the Position of the Neutral Axis of a Rectangular Section with Two Rows of Tension Reinforcement

In this post, I will go over the sixth reinforced concrete example in our structural reinforced concrete design course covering the design and analysis of flexural beam members. The goal of this reinforced concrete design example is to calculate the design moment strength and the position of the neutral axis of a rectangular section with two rows of tension reinforcement per ACI Code 318-11.

 

The problem statement states,

 

Find the design strength and the location of the neutral axis of the rectangular section shown below using ACI Code 318-11. The reinforcement used is (6) no. 9 bars arranged in two rows.

 

b = 13 in
d = 23.5 in
h = 27 in
dt = 24.5
f’c = 4 ksi

fy = 60 ksi