Main feature in analysis is that implement the 3D filer elements, which have ever received a good reputation and many actual results in UC-win/FRAME(3D) and the plate elements based on the Reissner-Mindlin theory and also static / dynamic analysis are available, considering material nonlinearity and geometric nonlinearity(Large Displacement) simultaneously.

▲Image of Fiber elements (the mathematical model on the right)

Plate elements can have laminated structures, consists of layers which direct to the thickness way and define each setting for different type of materials between each layers or linear/non/linearity. Reinforcement concrete non linear constitutive equation is adopted as concrete constitutive equation applied to the plate elements, which was developed by the concrete laboratory in Tokyo University. It can be said that this product's plate element has expanded RC element in UC-win / WCOMD to thickness way to multi-layer and has made it possible to analyze non-linear behavior not only of in-plane deformation but also of out-of-plane.
The isoparametric elements that are often used in the FEM have been adopted as flat plate elements.

▲ Image of laminated plate elements (the mathematical model on the right)

Addition of a triangle primary element enables a mixture of 3 and 4 node elements during the automatic mesh of complex shaped field (refer to the Triangular Liner in the figure below). High mesh elements (quadrilateral 8 node element and triangular 6 node element) can be converted into low-elements (quadrilateral 4 node element and triangular 3 node element) after being selected.

・Triangular 3 nodes element and a primary form function
・Triangular 6 node element and a secondary form function
・Quadrilateral 4 node element and a primary form function
・Quadrilateral 8 node element and a secondary form function

▲Kind of flat plate elements

▲Three types of creation commands for plate elements

▲Auto-mesh divide with the mixture of square
and triangular primary element

▲The button to convert high-elements into low-elements

The support of the 64bit version has realized the input and analysis of large models consuming a lot of memory.
You can output a report consisting of many pages (e.g. 30,000 pages).

▲Image of a large model

The seismic waveform you entered can be displayed in the new screen when you check the time history results of the dynamic analysis. Click in the graph to move to the next step, and the deformation figure and the section force are synchronized with the step.

▲Entered waveform displayed on the history result

Following verifications to RC section compliant with specifications for highway bridges are available; allowable moment stress vrf, moment strength vrf, average shear stress vrf, shear strength vrf, minimum amount of reinforcing bar vrf.

M-φ feature

・Framework: bilinear (symmetric, asymmetric) / tri-linear (symmetric, asymmetric) / tetra linear (symmetric, asymmetric)

・Internal history: Normal / Takeda / elastic / origin-oriented / origin maximum point-oriented / H11 railway seismic

Spring feature

・Framework: bilinear (symmetric, asymmetric) / tri-linear (symmetric, asymmetric) /
tetra linear (symmetric, asymmetric) / Nagoya high-speed rubber bearing type / BMR damper

・Internal history: Normal / Takeda / elastic / origin-oriented / origin maximum point-oriented /
H11 railway seismic / positive and negative direction / positive direction / negative direction / shock absorber /
Clough/slip type / Gap/Hook type

Hysteresis (stress-strain curve for the fiber element)

Material	Constitutive law
Concrete	Quadratic curve	Models that have been adopted as for the ultimate bending moment calculation in many compliance standards.
	Hoshikuma	Frameworks are n-dimensional curve and strain softening straight that takes into account the lateral restrain effect (specifications for highway bridges). Internal histories are "F3D original" and "Sakai-Kawashima model".
	COM3	Constitutive law developed at the concrete laboratory in University of Tokyo. In reference to JSCE Standard Specifications for Concrete Structures-2002 (Aseismatic Performance Verification)
	JSCE	The model which simplifies "COM3" type for rod member.
	Mander	Frameworks are fractional functions that takes into account the lateral restrain effect. Internal histories are "Sakai - Kawashima model".
Reinforcing Bar / Steel Plate / PC steel	frameworks: Bilinear (symmetric, asymmetric) Trilinear (symmetric, asymmetric)	Internal histories: kinematic hardening law (straight) / modified Menegotto-Pinto (Sakai - Kawashima) / modified Menegotto-Pinto (F8)
Carbon Fiber / Aramid Fiber	frameworks: linear (tensile side only)	No internal histories

Fiber elements

Fiber elements(original): Non-linear elements using rigid body link and distributed spring elements. Effects of shear deformation will be ignored. Deformation and rigidity of the member at both ends are independent, and it is suitable to analyze the members that produce negative rigidity. In addition, because of the rigidity matrix based on the constant curvature assumptions up to half of the length of the element, it is also easy to adjust with plastic hinge etc. assumptions that assume curvature constant section such as road bridge.

Fiber elements(primary): Two nodes isoparametric elements using a primary curve for shape function. Based on Timoshenko beam theory, it considers shear deformation effects. Elements curvature distribution in the length direction is constant. Based on the rigidity evaluation on one of the Gauss integration point in the middle of member, it uses Gauss integration and builds rigidity matrix of element.

Fiber elements(secondary): Three nodes isoparametric elements using quadratic curve for shape function.

Convergent improvement and damage index of nonlinear flat plate elements

As a verification function for non-linear RC plate element, the program calculates the second invariant of deviation strain and the normalized cumulative strain energy that are the damage index written in "Concrete standard specification (2012, 2017)" by Japan Society of Civil Engineers. Also, the convergence setting for non-linear plate element has been added and the issue that non-linear plate element was not converged easily has been solved. This allows users to reproduce the softening phenomenon that occurs after the maximum peak in the load displacement relationship easier.

▲The second invariant of deviation strain of RC non-linear beam
(average weight)

▲Relationship between load and displacement

・fiber elements, M-φ element, damage display of spring element
・display of damage on M-φ element
・display of damage on spring element
・stress calculation (mainly specifications for highway bridges)
・strength calculation (mainly specifications for highway bridges)
・curvature verification / spring element verification
・function of road bridge residual displacement verification
・ductility factor verification for highway bridges (μ=δmax / δy、μa=δls2 / (α*δy))
・displacement verification of highway bridges
・mport or export of CAD data(DXF / DWG format)
・IFC export

▲Displacement figure contour

▲Slab bending moment contour

Verification by the partial coefficient method adopted in the Specifications for Highway Bridges, 2017.
As a verification for the dynamic analysis of structure, it is possible to perform the shear strength verification and the curvature verification against the maximum response value. Displacement verification and residual displacement verification are available for single column type RC pier and single column type steel pier at every step. In addition, the verification corresponding to the biaxial bending is supported for the displacement verification and residual displacement verification.

Press Release
FORUM8 has released Engineer's Studio® Ver.7. Civil Structure Biaxial Section Calculation (Partial Factors Method / Specifications for Highway Bridges, 2017) Option is added.('17.09.26)

Live-load calculation is an analysis performed on the influence line of single bar. After creating the influence line, the program searches the location on each target point in which the section force etc. is the greatest or the least by moving the live-load (L load, T load and joint running interval). The analysis is usually for bridge axis.

Strain check based on the "Standard Specifications for Steel and Composite Structures" (February 2008, Japan Society of Civil Engineers) can be done. By modeling steel members using fiber elements and then assigning safety factors and ultimate strain, the result of strain check can be obtained.

Elements (frame / spring) determined as NG in verification can be displayed in red in model drawings.
This function is available for the verification results of section, limit state, curvature, plasticity rate, displacement, residual displacement, and spring.

▲NG materials displayed in red

<Frame element>

<Fiber element>

<Plate element>

<Damping element>

<Cable element>