Software for the Analysis and Design of structural cross sections
Arbitrary cross section analysis and reinforcement design under biaxial bending
Biaxial analysis, Moment Curvature and Interaction Diagrams, Reinforcement Design
Step by step worked examples (click here) Jump to screenshots
Cross Section Analysis
& Design is a powerful application that can perform a wide range of cross
section calculations, including the design of reinforced concrete sections (rebar calculator). The
given cross sections are built up of one or more geometric entities and can be
drawn directly using the versatile featured user interface. The user can also import
standard steel sections from a complete shape library according to all major
codes (AISC, Australian-New Zealand, BS, Chinese, European, Indian, Aluminum
There are no limitations regarding the shape, materials or loads of a
section, since the program can handle any arbitrary cross section under biaxial
bending and axial loads. Among its capabilities, Cross Section Analysis &
Design can calculate all sectional properties, plot Moment – Curvature and
Interaction diagrams, estimate the location of neutral axis under given sets of
biaxial loads and plot the corresponding stress – strain diagrams as well as
the resulting stress contours. The last-named items can also be calculated by
providing the location of the neutral axis plane on the section.
program fully complies with these codes concerning reinforced concrete
sections: AASHTO, UBC, AS 3600, IS 456, ACI 318, BS 8110, CSA A233, EC2, NZS 3101, CP 65.
The user can also perform a reinforcement design according to
above listed codes, plot the matching interaction diagrams etc., or even check
a given reinforcement pattern for the specified load cases.
The stress – strain
curves of concrete, reinforcement and other materials are specified as per the
defined Analysis Parameters Sets. Thus calculations can be performed for many
design situations, such as Ultimate/Serviceability or custom defined Limit
States, with an automatic adjustment of the material properties, safety factors
A large material library is also available according to almost all
concrete/reinforcement material specifications. Apart from concrete and
reinforcement materials, the user can specify custom linear, bilinear,
trilinear parabolic or fully general materials.
- Section properties
calculations (with regard to a user defined base material or the geometric
properties of the section) including inertia data, elastic and plastic
elasticity moduli, etc.
- Calculation and plotting of the Moment vs. Curvature diagram for bending
about a predefined axis. Accordingly, a Force vs. Axial strain diagram can be
- Calculation of the equivalent bilinear Moment vs. Curvature graph with
predefined or no hardening, as well as reporting of yield/ultimate curvatures
- Estimation of the neutral
axis, strain distribution and plotting of stress contour under given sets of
biaxial applied forces. Reporting of reinforcement forces (if any) and the
maximum/minimum stress locations for each material in the section.
- Estimation of the biaxial
applied forces under a given neutral axis (location, orientation and
curvature). As in previous case, the strain distribution and a stress contour
are plotted. Moreover, the reinforcement forces (if any) are reported and the maximum/minimum
stress locations for each material in the section are computed.
- Advanced Interaction Diagram Analysis. The failure surface is calculated
and plotted in one of the following coordinate systems, as per user defined
parameters: Moment about predefined axis vs. Axial force or Moment about first
axis vs. Moment about second axis. The user can specify different values for
reinforcement ratios (if rebars have been provided) or axial force values, so
that a multiple graphs can be plotted in one graph. This analysis type is
generic and can be used to excerpt the interaction diagram of any generic
section under of any material, shape etc. Apart from this, the use of Advanced
Interaction Analysis is not recommended for reinforced concrete cross sections,
where the following option is more appropriate.
- Interaction diagram as per
specified Reinforced Concrete Code. The program computes the interaction
diagram as explained before, but applies all relative regulation checks, stress
distributions, safety factors etc., according to the provided code (AASHTO, UBC, AS 3600, IS 456, ACI 318, BS 8110,
CSA A233, EC2, NZS 3101 and CP 65).
- Reinforcement Design. The
provided reinforcement is designed, so that the required rebar diameters are
chosen from the existing reinforcement rebars defined in the project. This
procedure takes place in accordance to the provided regulation (AASHTO, UBC, AS 3600, IS 456, ACI 318, BS 8110,
CSA A233, EC2, NZS 3101 and CP 65).
- Reinforcement Check. The given
reinforcement pattern is checked and a capacity ratio of the cross section is
reported. Reinforcement check and design features make this application a unique rebar calculator as well.
- All major systems of units are supported (Metric, US, User defined)
- Top quality graphics rendering
- Full GUI including zoom, pan, grid, snap options
- Every user action can be done graphically at real time
- Library with all major steel section shapes
- Library with all major concrete and reinforcement grades, as well as other
materials such as cold formed/hot rolled steel, timber etc.
- Use of linear, bilinear, trilinear and parabolic materials
- Definition of custom materials by providing a relevant stress strain curve
- Definition and use of
Analysis Parameters sets. In order to simulate different limit states for the
analysis/design of the cross section, the user can use the existing sets ULS
(Ultimate Limit State) or SLS (Serviceability Limit State), override them or
add more sets of Analysis Parameters. Each set defines the concrete stress
distribution at compressive or tensile zones, the safety factors (partial or
resistance) to be used and all preferences regarding the steel reinforcement
behavior in the calculations. Apart from these, the user can define his
preferences for the remaining non steel/reinforcement materials (if any) in the
section. Each load case is assigned with an Analysis Parameters set, so that
the appropriate considerations are considered in the analysis/design.
- Automatic calculation
of the minimum and maximum reinforcement ratio for a given cross section as per
the specified Reinforced Concrete regulation. These values are considered for
- Comprehensive and versatile reporting of the results
- Automatic creation of high-quality, editable calculation report that can be
exported to Word (doc), Excel (xls) and Adobe PDF (pdf) formats. Diagrams, plots and color contours are included in the report
- Creation of fully customizable graphs (Moment vs. Curvature, Interaction
etc.) as well as stress contours and strain distribution
- Reporting of neutral axis information, reinforcement forces and material
- Rebar calculation results (an existing rebar pattern is checked, or needed rebars are calculated and placed automatically) for the provided Limit States (ULS, SLS and other states defined by the user)
Click images to enlarge
Regulation for reinforced concrete design
Reinforcement bar definition
Concrete grades definition
Drawing cross section geometry
Standard steel sections library
Cross section of a composite column
Moment Curvature Analysis
Available analysis types for cross section
Finished geometry of cross section
Estimation of neutral axis, strain distribution and stress contour
Analysis results under biaxial loads
Application of a strain configuration
Material strength limits by code
Interaction diagram in terms of Moment vs. Moment
Check of provided reinforcement bars
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ENGISSOL provides analysis and design sofftware applications that are useful for professional engineers. Our aim is to offer generic applications that can be applied to the engineering practice and boost the efficiency of our clients by reducing their time and effort, while increasing their productivity and efficiency.
We offer all our solvers to individual developers, software companies, universities etc. In this way, our powerful software engines can be easily adapted and integrated to third party applications enabling our customers to take advantage of the reliability and robustness of our algorithms which have been proven accurate in use from numerous professional individuals or companies from all over the world. The sections that our libraries cover are related to structural Analysis and Design. Analysis is performed by using finite element methods according to the specific needs of the current projects in order to calculate the stress state of a structure after the application of the specified loads. Moreover, the Design section concerns the dimensioning of the structural members according to a regulation (for instance Eurocodes, ACI, AISC, DIN, BS etc) so that they can safely carry the previously specified loads by the analysis.
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