midas FEA is equipped with a variety of unique features that greatly expedite the process of advanced nonlinear design. These features have been developed specifically for refined analysis and provide solutions to common inefficiencies in the modeling and analysis processes. With the aid of these features you will be able to use midas FEA create the highly detailed finite element models that are needed to produce the most optimized and economical designs possible.
Advanced Nonlinear Analysis Capabilities
Solid elements can be used to model reinforcements that require local analysis for deformation and cracking. These calculations contribute to designs that are far more optimized and accurate than designs created from 1D finite element models. Interface elements can be modeled to calculate ultimate skin friction between two different materials. midas FEA has been widely used in the design of embedded bars, embedded grids and post-tensioned tendons.
Large scale concrete structures such as bridge girders and columns can be modeled with 3D solid elements. The use of solid elements allows for in-depth analyses of concrete that can effectively calculate critical loading conditions that lead to cracking. midas FEA's post-processor produces visualizations of the tension strain crack patterns as well the direction and status of the element for both fixed and rotating models.
Highly realistic simulations of cracking failure are essential for concrete bridge and concrete slabs that are subjected to large amounts of tension and must therefore implement post-tensioned steel reinforcements. midas FEA has been used for these projects because it enables engineers to create detailed 3D finite element models with a fraction of the time and effort it takes to model on other programs that are less specialized.
Fatigue analysis is necessary for bridges that are constantly subjected to heavy dynamic loads caused by vehicles and wind. These loads will gradually wear down the strength of the connections and materials over time. midas FEA features fatigue analysis that calculate the effects of repeated dynamic vibrations on the stability of the structure. The output file includes the total dynamic cycles that cause failure, safety factor, and damage estimation. With these results you will be able to effectively design for fatigue and prevent failure of the structure over an extended period of time.
Heat Transfer/Stress Analysis
Heat transfer analysis is typically performed for projects that require large amounts of concrete to be set. Significant amounts of heat expansion is caused by the evaporation of water within the concrete during the setting process. If this expansion is not properly taken into account during design then cracking, deformation, and other structural failures are liable to occur. midas FEA calculates and graphically displays the heat flux, heat flow, and temperature gradient. This enables you to predict the both the intensity and areas of heat transfer and modify your designs to prevent complications.
Superior Modeling Functionality
Bridges with non regular shapes like reverse S curves and flared girders need 3D finite element analysis to be performed to accurately estimate the force distribution. midas FEA is equipped with several geometric modeling tools that allow for seamless and quick modeling of bridges. With these specialized modeling features the global model as well as the essential components can be generated with precision, thus leading to a more accurate estimation of forces. For the modeling of curved and reverse S curved bridges there are several special features such as “sweep” and “extrude” that enable easy creation of curved bridges by simply defining the cross section and the layout line.
Frame to Solid Converter
It is often necessary to calculate the stress distribution at the junction of the frames. The most appropriate modeling technique for this is to model the frame elements as beams or trusses and then to model the junction in 3D. midas FEA allows for easy fusion of 1D elements (beams/trusses) with 3D solid elements. Analyzing only the joints as 3D solid elements significantly cuts down on the analysis time and gives the desired results.
Easy Tendon and Reinforcement Generation
midas FEA enables you to model tendons and reinforcements without having to inefficiently create the tendon and girder nodes at the same location. Instead, midas FEA automatically embeds them into the solid. This is an especially useful feature for PSC bridge design since it enables you to model accurate behavior of tendon prestressing without having to invest excessive amounts of time and effort.
Cross-section to full model function
For the design of curved bridges (steel or concrete), 3D finite element analysis must be used to obtain the effect of torsion or warping. midas FEA enables you to create the 3D finite element model of the bridge easily by extruding the cross section along the layout line. So all you need are the layout line and the cross section and the bridge modeling will be done in mere seconds.
Compatibility with midas Civil
midas FEA is fully compatible with midas Civil, our 3D bridge software. midas civil models can be exported to midas FEA for detailed analysis. Thus, engineers can use midas Civil for simple global analysis and then export the work to midas FEA for the more detailed aspects of the project.
Copy along a Guide Line
For steel bridges it is important to model the cross frames to study the load transfer. The modeling of cross frames poses a challenge for curved bridges since curved geometry makes it particularly difficult to model all the cross frames. midas FEA has a “sweep translate” feature that enables you to translate the cross frame along a trajectory (bridge layout). Thus you only need to model the cross frame at one position. Afterwards they can be translated to other parts using the “sweep translate” feature. This feature will save you considerable amounts of time and effort for all projects that have curved geometry.
Auto surfacing and mesh generation
The vital parts of the structure which require detailed analysis must be meshed properly in order to obtain precise results. midas FEA is well equipped with a mesher that creates perfect 3D Finite element meshing to maximize the accuracy of your work. The mesher recognizes the intersections and automatically creates the finer meshing at the location of higher stress change so that the analysis results are enhanced. Meshing can be copied, transformed or modified by using the various meshing alteration features available.