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Create a Circular Reinforced Cross-section¶

This example demonstrates how to create a circular reinforced concrete cross-section step by step using the blueprints library.

We'll start by defining materials, create the basic cross-section geometry, add reinforcement bars, include stirrups, and finally visualize our complete design.

Let's begin!

Import Required Libraries¶

First, let's import the necessary modules from the blueprints library:

In [1]:

"""Reinforced concrete cross-section example."""

from blueprints.materials.concrete import ConcreteMaterial, ConcreteStrengthClass
from blueprints.materials.reinforcement_steel import ReinforcementSteelMaterial, ReinforcementSteelQuality
from blueprints.structural_sections.concrete.reinforced_concrete_sections.circular import CircularReinforcedCrossSection

"""Reinforced concrete cross-section example.""" from blueprints.materials.concrete import ConcreteMaterial, ConcreteStrengthClass from blueprints.materials.reinforcement_steel import ReinforcementSteelMaterial, ReinforcementSteelQuality from blueprints.structural_sections.concrete.reinforced_concrete_sections.circular import CircularReinforcedCrossSection

Define Materials¶

Next, we'll define the concrete and reinforcement steel materials:

In [2]:

# Define a concrete material
concrete = ConcreteMaterial(concrete_class=ConcreteStrengthClass.C35_45)

# Define a reinforcement steel material
steel = ReinforcementSteelMaterial(steel_quality=ReinforcementSteelQuality.B500B)

# Define a concrete material concrete = ConcreteMaterial(concrete_class=ConcreteStrengthClass.C35_45) # Define a reinforcement steel material steel = ReinforcementSteelMaterial(steel_quality=ReinforcementSteelQuality.B500B)

Create the Cross-section¶

Now we'll create the circular reinforced cross-section with the specified dimensions:

In [3]:

# Define a circular reinforced cross-section
cs = CircularReinforcedCrossSection(
    diameter=400,
    cover=35,
    concrete_material=concrete,
)

# Define a circular reinforced cross-section cs = CircularReinforcedCrossSection( diameter=400, cover=35, concrete_material=concrete, )

Add Longitudinal Reinforcement¶

Let's add longitudinal reinforcement bars to the cross-section:

In [4]:

# Add longitudinal reinforcement to the cross-section
cs.add_longitudinal_reinforcement_by_quantity(
    n=5,
    diameter=25,
    material=steel,
)

# Add additional longitudinal reinforcement to the cross-section
cs.add_longitudinal_reinforcement_by_quantity(
    n=5,
    diameter=16,
    material=steel,
    start_angle=45,
)

# Add longitudinal reinforcement to the cross-section cs.add_longitudinal_reinforcement_by_quantity( n=5, diameter=25, material=steel, ) # Add additional longitudinal reinforcement to the cross-section cs.add_longitudinal_reinforcement_by_quantity( n=5, diameter=16, material=steel, start_angle=45, )

Add Stirrups¶

Now we'll add stirrups around the perimeter of the cross-section:

In [5]:

# Add stirrups to the cross-section
cs.add_stirrup_along_perimeter(
    diameter=10,
    distance=150,
    material=steel,
)

# Add stirrups to the cross-section cs.add_stirrup_along_perimeter( diameter=10, distance=150, material=steel, )

Out[5]:

Stirrup (id=1)|⌀10/B500B

Review What We've Built¶

At this point, we have:

• ✅ A 400mm diameter circular concrete cross-section with 35mm cover
• ✅ 5 longitudinal reinforcement bars (25mm diameter)
• ✅ 5 additional reinforcement bars (16mm diameter, offset by 45°)
• ✅ Stirrups (10mm diameter, spaced at 150mm intervals)

Now let's see our complete reinforced concrete cross-section!

Visualize Our Cross-section¶

Finally, let's plot the cross-section to see our complete design:

In [6]:

# Plot the cross-section
import matplotlib.pyplot as plt

fig = cs.plot(show=False)  # Create the plot but don't show it yet
plt.show()

# Plot the cross-section import matplotlib.pyplot as plt fig = cs.plot(show=False) # Create the plot but don't show it yet plt.show()

Summary¶

This example demonstrated how to:

1. Import the necessary modules from the blueprints library
2. Define concrete and steel materials
3. Create a circular reinforced concrete cross-section
4. Add longitudinal reinforcement bars
5. Add stirrups around the perimeter
6. Visualize the final cross-section

The resulting cross-section includes both primary and secondary reinforcement, providing a comprehensive example of how to work with circular reinforced concrete sections in the blueprints library.