Design for doubly reinforced concrete beam

To design the doubly reinforced concrete beams the following things which we have to explain. We have to plot the shear diagram as well as also the moment diagram according to the situation. Before we draw the shear diagram we describe the behavior of the shear if the shear stresses horizontal occur and to cause tensile stresses by bending stresses where that cracks the concrete. To bridge the cracks vertical reinforcement is required that also known as shear stirrups

For this code we need to initialize all the value, the first step is to initialize the value of pu that is the force value, the user can able to change this value according to the requirement and also initialize other value that are the input arguments . These input arguments are Ag, phi, k, fcp and fy

This is the function that is used to calculate the gross column for the beam, then in the next step the gross column value through using this formula

The function will help to find out the total cross section area of the column. For this the first step is to initialize the input arguments for using this function then apply the formula to find out the cross sectional area of the beam.

This function will help to find the value of spacing required between the bars. For this the first step is that we have to initialize the number of bars required. The first step is to initialize the bar number that will be taken from the user, then after this apply the, if else condition means that if the user select the bar number 3 so it will tell you about the bar area.

This function will found out the value of associated moment. For applying this code the first step is to initialize the value of all input arguments. If the input value of fy is 40 and 50 so that the value of r changes. If the value of fy is greater than 60 so the value of r changes according to that. s

Final summary

Matlab code for Load ‘P’. as you show the values in workplace

Code for the moment or shear diagram:

Code: