RCBeam Library

A java library for the analysis of reinforced concrete beams of any section.

Section Features

• Hollow Sections
• Any shape (provided with x,y coordinates) except rounded
• Default unit is metric

Limitations

• Horizontal line intersection in a polygon must not exceed 2.

Analysis Results

• Moment
• Curvature
• Height of compression block

Creating Steel in Tension Object

// Creating object
SteelTension st = new SteelTension();

// Asigning the steel area, 2nd parameter is true if in metric units (in square millimeters)
st.setTotalArea(1200, Unit.METRIC);

Creating Steel in Compression Object

// Creating object
SteelCompression sc = new SteelCompression();

// Asigning the steel area, 2nd parameter is true if in metric units (square millimeters)
sc.setTotalArea(1200, Unit.METRIC);

// Set the location of compression steel reinf. from extrem concrete compression fiber (in millimeters)
sc.setdPrime(50, Unit.METRIC);

Creating BeamSection Object

// Creating object
BeamSection beam = new BeamSection();

// Create section shape
Section section = new Section();
List<Node> mainSection = new ArrayList();
mainSection.add(new BeamSectionNode(0, 0));
mainSection.add(new BeamSectionNode(0, 500));
mainSection.add(new BeamSectionNode(300, 500));
mainSection.add(new BeamSectionNode(300, 0));

section.setMainSection(mainSection);

beam.setSection(section);

// Define unit
beam.setUnit(Unit.METRIC);

// Define properties
beam.setFcPrime(21);
beam.setEffectiveDepth(450);
beam.setFy(275);

// Define reinforcements
beam.setSteelTension(st);
beam.setSteelCompression(sc);

Creating a hollow section

Hollow portions are needed to define a hollow sections or sections that may have more than 2 intersections if you draw a horizontal line at any point. For example, if you want to draw a section above with a v-shape cut at the top, you could use the following snippet as a guide:

List<Node> clipping = new ArrayList();
clipping.add(new Node(100, 500));
clipping.add(new Node(200, 500));
clipping.add(new Node(150, 350));
clipping.add(new Node(100, 500));

section.addClipping(clipping);

Creating an Analysis

// Creating an object, specifying the beam section to be analyzed
BeamAnalyses analyses = new BeamAnalyses(bs);

// Defining a result from the analysis
BeamAnalysisResult uncrackAnalysis = analyses.uncrackedAnalysis();

// Accessing the result
// Cracking moment
System.out.println(uncrackAnalysis.getMomentC());
// Curvature right before cracking
System.out.println(uncrackAnalysis.getCurvatureC());
// Minimum tensile reinforcement as required by ACI code
System.out.println(uncrackAnalysis.getMinimumSteelTensionArea());

Balanced Design Analysis

analyses.balancedAnalysis(StressDistribution.WHITNEY);
double Asb = analyses.getBalancedSteelTension();

Nominal Moment Capacity

BeamAnalysisResult limitAnalysis = analyses.beamCapacityAnalysis(StressDistribution.WHITNEY);
double Mn = limitAnalysis.getMomentC();

How to Contribute

Anyone is welcome to contribute via coding or anything. For coding contributions, please refer to the issues and find the topic that best suits you. If for a reason the topic you want to contribute isn't listed yet, feel free to create the issue and I'll try to respond as quickly as I could.