CivilFEM Advanced


CivilFEM Advanced includes all functionality from CivilFEM Intro, and offers a complete set of advanced tools for non-linearities, geotechnical simulations and all types of major infrastructure. Such as, Non-linear evolutive construction process & material time-dependent properties | Nonlinear  reinforced Concrete (Cracking, Crushing, Fiber reinforce, Creep and Shrinkage) | Post/pre-stressed concrete (beam, shell and solid elements) | Geotechnical material models: Drucker-Prager, Mohr-Coulomb (C&Phi variables), Cam-Clay, Hyperbolic model (Duncan-Chang) & Hoek and Brown | Non-linear Buckling | User Nonlinear material (strain-stress diagram definition)| Advanced Non-linear contacts: Bond-slip & Cohesive- Frictional.

ALL FUNCTIONALITY FROM CIVILFEM INTRO PLUS:

Pre-stressed Reinforced concrete is a key component in the design of large concrete structures such as bridges, large slabs, contention buildings, pressure vessel, etc. In CivilFEM, the user can create the tendons defining the tendon geometry by points and curves, giving the user total freedom in the way the tendons are created. Complex tendon geometry can be entered easily using the dedicated tendon editor. Prestressed reinforced concrete is available for beams, shell and solids.

 

CivilFEM can accurately model the interaction between contacting elements or different parts of the structure. Due to the non-linear nature of contact problems, CivilFEM is able to perform a non-linear contact analysis that will lead to high accuracy results. On the other hand, even if the calculation is complex, the user interface for defining contacts is extremely easy to use. At present, CivilFEM Advanced adds two more types of contacts: Bond-slip & Cohesive- Frictional

   

The pre-stressing or post-stressing process suffers from tensional losses due to a variety of factors, which can be immediate or long-term. CivilFEM model both kinds of losses, allowing very precise pre-stressed concrete calculations by implementing losses due to steel relaxation, thermal effects, anchor slippage, friction, concrete creep, and other known effects that can be taken into consideration in the CivilFEM pre-stressing tools.

 

Pre-stressed and post-stressed tensional losses

Concrete properties change during its lifespan. The user can define the evolution of these properties and check the model at different time periods to optimize the construction process and ensure the proper long-term stability and behavior of the structure.

 

Apart from the non-linear constitutive law models included in CivilFEM, a material can be defined using different material behavior laws such as Drucker-Prager, Mohr-Coulomb (C&Phi variables), Cam-Clay, Hyperbolic model (Duncan-Chang) & Hoek and Brown. That suit certain materials better than the default material models. Orthotropic and anisotropic materials can be defined too, for those cases where materials with different properties in different directions are used. In addition “Initial stress state” can be analyzed.

CivilFEM includes the option for considering creep and shrinkage effects of concrete. These factors affect a concrete structure in the long run, and can lead to unexpected and unwanted results after a long time. With this CivilFEM capability, the analysis will be more accurate in cases where these factors play a major role, such as concrete wall, bridges, dams or membrane structures.

Concrete Creep and Shrinkage

CivilFEM includes advanced material models to accurately represent non-linear yielding behavior such as concrete material model, isotropic stress-strain diagram and Drucker Prager as well as a multi-linear elastic behavior. The stress-strain diagrams are defined by means of the analysis diagram which includes the non-linear concrete behavior by code.

Non-linear stress-strain diagram

For every defined material, the user can change its constitutive law from the default linear stress-strain diagram to a non-linear one. These are defined either by code (concrete, reinforcing steel and structural steel) or stress strain diagram definition (generic material).On the other hand, these material laws may have non-linear elastic behavior or yield conditions (isotropic stress-strain and concrete material model).

Non-linear stress-strain diagram

CivilFEM can handle concrete and other low tension material. The user crack data option assists in predicting crack initiation and in simulating tension softening, plastic yielding and crushing. This option can be used for concrete or any other user material.

User crack data

Fiber-reinforced concrete with steel or microsynthetic fibers and low or high fiber addition rates.

Buckling problems are usually analyzed using a linear approach but it often falls under unsafe conditions. In order to obtain better and safer results, CivilFEM can perform a second order buckling analysis using the large displacement and non-linear material behavior method for any type of elements that takes into consideration the change in geometry and stiffness during the non-linear buckling process.

Pandeo

Construction stage and time-dependent engineering problems form a key part in understanding the response of a structure and the subsequent behavior during the construction process period. CivilFEM enables this kind of analysis by implementing time-dependent properties, activation and deactivation of elements, and graphical representation tools, providing the user with intermediate results that will prove very useful for the understanding of the construction non-linear behavior and effects.

 

A common engineering problem is the design and checking of retaining walls. CivilFEM provides features that include options for excavation phases, anchorages, contacts and many other specific geotechnical parameters for wall design.

 

  

Another common engineering task is foundation design, which includes pile and micropiles calculations. CivilFEM implements a set of features for pile and micropiles design that consider reinforcement, terrain, geometry, cap dimensions and materials and obtain the needed pile length.

Piles and micropiles 

One complex problem that a civil engineer can encounter is slope stability in terrains. CivilFEM slope stability module accounts for circular slip surfaces, pore water pressure lines and reinforcement earth groups in order to obtain the safety coefficient by classic methods (Bishop, Fellenius, etc.) and FEM models.

 

With features as non-linear construction process + nonlinear contacts with cohesion + hydrodynamic masses (modal and transient) + non-linear time history + Reinforced Concrete Creep and shrinkage + User Crack Data + Insert Tool in order to use Micro piles or pipe umbrella + Geotechnical material models: Drucker-Prager, Mohr-Coulomb (C&Phi variables), Cam-Clay, Hyperbolic model (Duncan-Chang) & Hoek and Brown + Fiber Reinforced concrete, and thanks to the powerful non-linear solver  MARC®, CivilFEM is able to satisfactorily solve a broad range of complex analysisas such as the analysis of the interaction of soil structure.