Software

Please note that no user support is provided for the free software available below. If you have a question relating to software usage, try posting it on the Forum provided.

**NOTE** - Uninstall previous version of bundled software before installing new version.

Bundled Analysis Software

Complete Package for the Nonlinear Analysis of Two-Dimensional Reinforced Concrete Membrane Structures.

Includes documentation, links and support information for the following programs:

VecTor2

VecTor2 is a nonlinear finite element analysis (NLFEA) program for the analysis of two-dimensional reinforced concrete membrane structures subjected to quasi-static load conditions. VecTor2 uses a smeared, rotating-crack formulation for reinforced concrete based on the Modified Compression Field Theory and the Disturbed Stress Field Model. The program’s solution algorithm is based on a secant stiffness formulation using a total-load iterative procedure, giving it numerically robust and stable performance with good convergence characteristics.

Incorporated into the program’s analysis algorithms are second-order effects such as compression softening due to transverse cracking, tension stiffening, shear slip along crack surfaces, and other mechanisms important in accurately representing the behaviour of cracked reinforced concrete structures. Recent enhancements include provisions for the consideration of: nonlinear expansion and confinement, cyclic loading, effects of slip distortion on element compatibility relations, bond slip of rebars, and application to the analysis of repaired or rehabilitated structures. A wide range of model behaviour models are available for representing each of the various constitutive responses and mechanisms considered.

The analysis approach taken by VecTor2 is to use many low-powered elements in representing a structural element. Hence, the element library is limited to a 4-node rectangular or quadrilateral element (8 d.o.f.), a 3-node triangular element (6 d.o.f.), and a 2-node truss bar element (4 d.o.f.). Reinforcement can be modeled either as smeared within the solid elements, or as discrete bars using the truss elements. For modeling mechanisms relating to bar slip and adhesion loss, a 2-node bond link element and a 4-node contact element are also available. It is noteworthy that the stiffness coefficients for each of the elements available can be evaluated explicitly, hence bypassing the need for numerical integration procedures that can lead to numerical instabilities (e.g., zero energy nodes, shear-locking) and prolonged computation times.

VecTor2 is currently configured to accommodate the following:

- 6000 elements
- 5200 nodes
- 3200 bandwidth
- 25 concrete material types
- 25 steel material types
- 4 smeared reinforcement components per material type.

FormWorks

Program FormWorks is an advanced graphics-based pre-processor for the Microsoft Windows environment, specifically formulated for use with the VecTor2 program. FormWorks includes facilities for automatic mesh generation, data visualization and input, as well as specialized features such as automatic inclusion of bond link elements with rebar elements and advanced editing and error-checking features. The automatic mesh generation algorithm requires only economical user input, permits a high degree of user control over mesh topology, and generates mixed element type meshes for reinforced concrete structures. Hence, the modeling of structural details, reinforcement details, and variable material properties is greatly facilitated.

Augustus

Program Augustus is an advanced graphics-based post-processor for the Microsoft Windows environment, specifically formulated for use with the VecTor2 program. It provides comprehensive post-analysis visualization of global and local load-deformation response, element stress and strain conditions, deflection and crack patterns, damage indicators, and other pertinent data. Extensive graphing capabilities permit a wide range of plots of global or local behaviour indicators obtained from load- or time-series analyses.

Janus

Janus is a graphics-based pre-processor, specifically formulated for use with the VecTor series programs. It provides the user with the capability to display both local and global response characteristics in a robust and straightforward manner. Janus will allow the user to comprehensively recall and manipulate structural analysis results on a model-wide basis as well as display pertinent information for individually specified elements of interest.

Complete Package for the Nonlinear Analysis of Two-Dimensional and Three-Dimensional Reinforced Concrete Structures.

Includes documentation, links and support information for the following programs:

VecTor2

VecTor2 is a nonlinear finite element analysis (NLFEA) program for the analysis of two-dimensional reinforced concrete membrane structures subjected to quasi-static load conditions. VecTor2 uses a smeared, rotating-crack formulation for reinforced concrete based on the Modified Compression Field Theory and the Disturbed Stress Field Model. The program’s solution algorithm is based on a secant stiffness formulation using a total-load iterative procedure, giving it numerically robust and stable performance with good convergence characteristics.

Incorporated into the program’s analysis algorithms are second-order effects such as compression softening due to transverse cracking, tension stiffening, shear slip along crack surfaces, and other mechanisms important in accurately representing the behaviour of cracked reinforced concrete structures. Recent enhancements include provisions for the consideration of: nonlinear expansion and confinement, cyclic loading, effects of slip distortion on element compatibility relations, bond slip of rebars, and application to the analysis of repaired or rehabilitated structures. A wide range of model behaviour models are available for representing each of the various constitutive responses and mechanisms considered.

The analysis approach taken by VecTor2 is to use many low-powered elements in representing a structural element. Hence, the element library is limited to a 4-node rectangular or quadrilateral element (8 d.o.f.), a 3-node triangular element (6 d.o.f.), and a 2-node truss bar element (4 d.o.f.). Reinforcement can be modeled either as smeared within the solid elements, or as discrete bars using the truss elements. For modeling mechanisms relating to bar slip and adhesion loss, a 2-node bond link element and a 4-node contact element are also available. It is noteworthy that the stiffness coefficients for each of the elements available can be evaluated explicitly, hence bypassing the need for numerical integration procedures that can lead to numerical instabilities (e.g., zero energy nodes, shear-locking) and prolonged computation times.

VecTor2 is currently configured to accommodate the following:

- 6000 elements
- 5200 nodes
- 3200 bandwidth
- 25 concrete material types
- 25 steel material types
- 4 smeared reinforcement components per material type.

VecTor3

VecTor3 is a nonlinear finite element analysis program for reinforced concrete three-dimensional solid structures subjected to quasi-static load conditions. VecTor3 uses a smeared, rotating-crack formulation for reinforced concrete based on the Modified Compression Field Theory and the Disturbed Stress Field Model. The program’s solution algorithm is based on a secant stiffness formulation using a total-load iterative procedure, giving it numerically robust and stable performance with good convergence characteristics.

Incorporated into the program’s analysis algorithms are second-order effects such as compression softening due to transverse cracking, tension stiffening, shear slip along crack surfaces, and other mechanisms important in accurately representing the behaviour of cracked reinforced concrete structures. Recent enhancements include provisions for the consideration of: nonlinear expansion and confinement, cyclic loading, effects of slip distortion on element compatibility relations, and application to the analysis of repaired or rehabilitated structures. A wide range of model behaviour models are available for representing each of the various constitutive responses and mechanisms considered.

VecTor3 employs an 8-node (24 degree of freedom) brick element that assumes linear displacement fields. As well, a 6-node wedge element and a 2-node truss bar element are available. Reinforcement is typically modeled as smeared within the elements, although it may be modeled discretely using the truss bar elements when advantageous. It is noteworthy that the stiffness coefficients for each of the elements available can be evaluated explicitly, hence bypassing the need for numerical integration procedures that can lead to numerical instabilities (e.g., zero energy nodes, shear-locking) and prolonged computation times.

VecTor3 is currently configured to accommodate the following:

- 12000 elements
- 15000 nodes
- 45 concrete material types
- 15 steel material types
- 4 smeared reinforcement components per material type

VecTor4

VecTor4 is a nonlinear finite element analysis (NLFEA) program for reinforced concrete shells and plates subjected to quasi-static load conditions. VecTor4 uses a smeared, rotating-crack formulation for reinforced concrete based on the Modified Compression Field Theory and the Disturbed Stress Field Model. A principal feature of the program formulation is the inclusion of transverse shear deformations, based on the assumption of a constant normal shear strain through the thickness of the shell element. The formulation is also based on other typical assumptions used in Mindlin Plate theory; that is: i) normals to the mid-surface remain straight but not necessarily normal after deformation; and ii) resultant stresses normal to the mid-surface are negligible.

VecTor4 employs a layered element formulation to model section nonlinearities. Up to 15 layers are used to model the shell thickness, where each layer has the same thickness and concrete properties. Steel layers are superimposed to model the in-plane reinforcement. Out-of-plane (transverse shear) reinforcement is defined as a property of the concrete layers. Incorporated into the program’s analysis algorithms are second-order effects such as compression softening due to transverse cracking, tension stiffening, shear slip along crack surfaces, and other mechanisms important in accurately representing the behaviour of cracked reinforced concrete structures.

Degenerated quadratic isoparametric shell elements are employed in the algorithm developed; specifically, a 9-noded, 42-degree-of-freedom Heterosis element is favoured. Quadratic shape functions are used to describe element geometry, allowing it to have curved sides and a curved surface. All side and corner nodes have three translational and two rotational degrees of freedom; the central ninth node has only the two rotational degrees of freedom. A principal advantage of the Heterosis element is that it exhibits good behaviour for both thick and thin shells.

VecTor4 employs selective integration. The 3 x 3 gauss quadrature rule is used for evaluating the bending stiffness components, while the 2 x 2 rule is used for the shear stiffness components to effectively avoid shear locking problems. When using the reduced integration rule, problems with zero energy modes may arise. However, with the Heterosis element, only one zero energy mode exists and it is not communicable when more than one element is used. The solution algorithm used in the NLFEA formulation is a full-load, direct iteration procedure based on variable secant moduli. The solution algorithm accommodates both nonlinear material and nonlinear geometric behaviour.

VecTor4 is currently configured to accommodate the following:

- 600 elements
- 3000 nodes
- 20 concrete/steel material types
- 15 concrete layers per material type
- 6 smeared reinforcement components per material type

VecTor5

VecTor5 is a nonlinear sectional analysis program for two dimensional frame-related structures consisting of beams, columns and shear walls, subjected to temperature, static and dynamic loading conditions. Temperature loads include nonlinear thermal gradients; static loads include monotonic, cyclic and reversed-cyclic load cases; dynamic loads include base accelerations (time-history analysis under an input accelerogram), impulse, impact and blast loads, initial velocity and constant acceleration load cases. Based on the Disturbed Stress Field Model (Vecchio, 2000), VecTor5 uses a smeared, rotating crack approach for reinforced concrete based on a total load, secant stiffness formulation.

The computational algorithm performs two interrelated analyses. Using a direct stiffness method, VecTor5 performs a global frame analysis first. Rigorous sectional analyses of concrete member cross sections are then performed at various sections along the lengths of the members, using a distributed nonlinearity fibre model approach. The computed responses are enforced with the use of an unbalanced force approach where the unbalanced forces are reduced to zero iteratively.

VecTor5 is capable of considering such second order effects as material and geometric nonlinearities, time- and temperature-related effects, membrane action, nonlinear degradation of concrete and reinforcement due to elevated temperatures, compression softening due to transverse cracking, tension stiffening due to load transfer between cracked concrete and reinforcement, tension softening due to fracture-related mechanisms, shear slip along crack surfaces, nonlinear concrete expansion, confinement effects, previous loading history, effects of slip distortions on element compatibility relations, concrete prestrains and reinforcement dowel action. Required for the dynamic analyses, VecTor5 considers strain rate effects on the concrete and reinforcement as well as damping effects on the structure.

VecTor5 is currently configured to accommodate the following:

- 1200 elements
- 1000 nodes
- 50 member (section) types
- 110 concrete layers per member type
- 30 rebar components per member type

VecTor6

VecTor6 is a nonlinear finite element analysis program for reinforced concrete three-dimensional axisymmetrical solid structures subjected to quasi-static load conditions. VecTor6 uses a smeared, rotating-crack formulation for reinforced concrete based on the Modified Compression Field Theory and the Disturbed Stress Field Model. The program’s solution algorithm is based on a secant stiffness formulation using a total-load iterative procedure, giving it numerically robust and stable performance with good convergence characteristics.

Incorporated into the program’s analysis algorithms are second-order effects such as compression softening due to transverse cracking, tension stiffening, shear slip along crack surfaces, and other mechanisms important in accurately representing the behaviour of cracked reinforced concrete structures. Recent enhancements include provisions for the consideration of: nonlinear expansion and confinement, cyclic loading, effects of slip distortion on element compatibility relations, and application to the analysis of repaired or rehabilitated structures. A wide range of model behaviour models are available for representing each of the various constitutive responses and mechanisms considered.

VecTor6 employs a 4-node (8 degree of freedom) rectangular torus element that assumes linear displacement fields. As well, a 3-node triangular torus element (6 d.o.f) and a 1-node (2 d.o.f.) ring element are available. Reinforcement is typically modelled as smeared within the elements, although circumferential reinforcement (spirals, hoops, FRP overlays, etc.) may be modelled discretely using the ring element when advantageous. It is noteworthy that the stiffness coefficients for each of the elements available can be evaluated explicitly, hence bypassing the need for numerical integration procedures that can lead to numerical instabilities (e.g., zero energy nodes, shear-locking) and prolonged computation times.

VecTor6 is currently configured to accommodate the following:

- 6000 elements
- 6500 nodes
- 45 concrete material types
- 15 steel material types
- 4 smeared reinforcement components per material type

FormWorks-Plus

Program FormWorks-Plus is an extended version of the FormWorks program which is compatible with the entire suite of VecTor software. It has a wide range of viewing features and facilities for specification of node coordinates, elements, loads and material properties for two-dimensional and three-dimensional structures.

Augustus

Janus

Nonlinear Analysis of Two-Dimensional Reinforced Concrete Frame Structures.

Includes documentation, links and support information for the following programs:

VecTor5

VecTor5 is a nonlinear sectional analysis program for two dimensional frame-related structures consisting of beams, columns and shear walls, subjected to temperature, static and dynamic loading conditions. Temperature loads include nonlinear thermal gradients; static loads include monotonic, cyclic and reversed-cyclic load cases; dynamic loads include base accelerations (time-history analysis under an input accelerogram), impulse, impact and blast loads, initial velocity and constant acceleration load cases. Based on the Disturbed Stress Field Model (Vecchio, 2000), VecTor5 uses a smeared, rotating crack approach for reinforced concrete based on a total load, secant stiffness formulation.

The computational algorithm performs two interrelated analyses. Using a direct stiffness method, VecTor5 performs a global frame analysis first. Rigorous sectional analyses of concrete member cross sections are then performed at various sections along the lengths of the members, using a distributed nonlinearity fibre model approach. The computed responses are enforced with the use of an unbalanced force approach where the unbalanced forces are reduced to zero iteratively.

VecTor5 is capable of considering such second order effects as material and geometric nonlinearities, time- and temperature-related effects, membrane action, nonlinear degradation of concrete and reinforcement due to elevated temperatures, compression softening due to transverse cracking, tension stiffening due to load transfer between cracked concrete and reinforcement, tension softening due to fracture-related mechanisms, shear slip along crack surfaces, nonlinear concrete expansion, confinement effects, previous loading history, effects of slip distortions on element compatibility relations, concrete prestrains and reinforcement dowel action. Required for the dynamic analyses, VecTor5 considers strain rate effects on the concrete and reinforcement as well as damping effects on the structure.

VecTor5 is currently configured to accommodate the following:

- 1200 elements
- 1000 nodes
- 50 member (section) types
- 110 concrete layers per member type
- 30 rebar components per member type

Janus

Analysis Software

Blast Load pre-processor for VecTor program

VecTor-Blast, developed for use with the Microsoft Windows XP environment, is a graphics based pre-processor generating pressure-time histories from blast loads for cuboid structures. The calculated pressure-time histories can be used in the load files of the *VecTor* suite of programs or other finite element packages. The computed blast pressures are calculated in accordance with the 1990 version of the U.S. Army, Structures to Resist the Effects of Accidental Explosions, Manual.

Limitations:

- TNT explosives