SCIAEngineerFactSheet - SCIA Structural Analysis Software ...
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esacbd.01.05 SCIA Engineer Fact Sheet SCIA nv - Industrieweg 1007 - B-3540 Herk-de-Stad (Belgium); Tel.: +32 13 55 17 75 - [email protected] SCIA North America - 7150 Riverwood Drive - Columbia, MD (USA); Tel.: +1 410-290-5114 - [email protected] (SCIA - 15 / 02 / 2016) For a complete list of all our international agencies and partners, please visit our website scia.net Design of composite members according to AISC 360-10 The new release 15 of SCIA Engineer featuresa comprehensive solution for the modelling, analysis and design of composite-beam floor systems. This new development meets the two principle demands that engineers put forward when working with composite structures: l the accurate structural analysis in a 3D FEM environment. l the code-based design of individual structural entities (ULSand SLS checks). Accurate FEM-based calculation The Composite Analysis Model (CAM) in SCIA Engineer analyses the entire structure during the stages of construction, service, and maintenance. Deformations and load effects obtained from different stages are superimposed, taking into account the presence or lack of composite action and creep in concrete slabs. The AISC 360-10 stipulates which parts of a composite slab can be considered to contribute to the strength and stiffness of a composite beam. In SCIA Engineer 15, the effective width of a composite beam is automatically calculated. This includes an automatic detection of: l span length. l distance to neighbouring elements in the 3D model (i.e., other beams, openings), l distance to slab edges. The Composite Analysis Model calculates the exact orthotropic properties of corrugated steel decks and composite slabs (corrugated steel deck & concrete topping). These orthotropic properties, as well as the augmented contribution of the steel beams (depending on the degree of composite action) are used in the FEM calculations. Internally, the calculation distinguishes between three FEM submodels (with different stiffness of the composite slabs) – one for the construction stage and two for the final (composite) stage. The stage-based model evaluates rheological effects (i.e. creep) by distinguishing between long and short- term load cases in the final (service) phase. The functionality supports two possible ways of modelling of steel ribs in the composite slab. The first one (a "standard composite action") overrules any parasitic normal forces that may arise from eccentricity between the slab and beam in the FEM model. This idealisation is suitable for majority of composite floors. The second one (an "advanced composite action") uses the actual cross-section properties and alignment of the beams. As a result, normal forces are generated in both beam and deck as a result of the actual eccentricity of the 1D member. The latter approach is useful if horizontal loads could lead to additional bending in the composite beams. No limitations are stipulated on the structural system, span type, or arrangement of beams in the slab. Composite beams may be simply supported, continuous, or cantilevers. Regardless if these are parallel or with arbitrary orientation within the slab – composite beams are analysed accurately without any additional user input. Finally, a shear stud library, as well as a steel decks library with common profiles from US manufacturers are also provided. Code-base design The design of composite beams is performed according to AISC 360-10 standard and includesthe following features: l Ultimate limit states (ULS) design checks are performed for both construction and composite stages. l Both the Load and Resistance Factor Design (LRFD) and Allowable Strength Design (ASD) methods are supported for checks in the ULS. l Positive & negative flexural strength is evaluated per AISC 360- 10, Chapter I2. l The contribution of concrete slabs to the resistance of steel beams in the final composite stage is taken into account via calculated effective width; l Shear strength (including shear buckling) isevaluated per AISC 360-10, Chapters I4 & G2. l The strength of shear connectors is evaluated per AISC 360- 10 Chapters I3b & I8. l Other detailing provisions (related to concrete slab, steel deck and shear studs) are taken into account as per AISC 360-10 Chapter I. l Serviceability limit state (SLS) checks are performed for both the construction and final(composite) stages. l Camber can be set as an absolute value or as a value relative to the span length. l All unity checks values may be plotted along the beams in the 3D view, or listed in tables.
Transcript of SCIAEngineerFactSheet - SCIA Structural Analysis Software ...
esacbd.01.05
SCIA Engineer Fact Sheet
SCIA nv - Industrieweg 1007 - B-3540 Herk-de-Stad (Belgium); Tel.: +32 13 55 17 75 - [email protected] North America - 7150 Riverwood Drive - Columbia,MD (USA); Tel.: +1 410-290-5114 - [email protected]
(SCIA - 15 / 02 / 2016) For a complete list of all our international agencies and partners, please visit our website scia.net
Design of composite members according to AISC 360-10
The new release 15 of SCIAEngineer featuresa comprehensive solution forthe modelling, analysis and design of composite-beam floor systems. Thisnew development meets the two principle demands that engineers putforwardwhenworkingwith composite structures:l the accurate structural analysis in a 3D FEMenvironment.l the code-based design of individual structural entities (ULS and SLS
checks).
Accurate FEM-based calculationTheComposite AnalysisModel (CAM) in SCIA Engineer analyses the entirestructure during the stages of construction, service, and maintenance.Deformations and load effects obtained from different stages aresuperimposed, taking into account the presence or lack of composite actionand creep in concrete slabs.The AISC 360- 10 stipulates which parts of a composite slab can beconsidered to contribute to the strength and stiffness of a composite beam.In SCIA Engineer 15, the effective width of a composite beam isautomatically calculated. This includesan automaticdetection of:l span length.l distance to neighbouring elements in the 3D model (i.e., other beams,
openings),l distance to slab edges.
TheComposite AnalysisModel calculates the exact orthotropicproperties ofcorrugated steel decks and composite slabs (corrugated steel deck &concrete topping). These orthotropic properties, as well as the augmentedcontribution of the steel beams (depending on the degree of compositeaction) are used in the FEMcalculations.Internally, the calculation distinguishes between three FEMsubmodels (withdifferent stiffness of the composite slabs) – one for the construction stageand two for the final (composite) stage. The stage-based model evaluatesrheological effects (i.e. creep) by distinguishing between long and short-term load cases in the final (service) phase.The functionality supports two possible ways ofmodelling of steel ribs in thecomposite slab. The first one (a "standard composite action") overrules anyparasiticnormal forces thatmayarise fromeccentricitybetween the slab andbeam in the FEM model. This idealisation is suitable for majorityof compositefloors. The second one (an "advanced composite action") uses the actualcross-section properties and alignment of the beams. As a result, normalforces are generated in both beam and deck as a result of the actual
eccentricity of the 1D member. The latter approach is useful if horizontalloadscould lead to additional bending in the composite beams.No limitations are stipulated on the structural system, span type, orarrangement of beams in the slab. Composite beams may be simplysupported, continuous, or cantilevers. Regardless if these are parallel orwith arbitrary orientation within the slab – composite beams are analysedaccuratelywithout anyadditional user input.Finally, a shear stud library, as well as a steel decks library with commonprofiles fromUSmanufacturersare also provided.
Code-base designThe design of composite beams is performed according to AISC 360-10standard and includes the following features:l Ultimate limit states (ULS) design checks are performed for both
construction and composite stages.l Both the Load and Resistance Factor Design (LRFD) and Allowable
StrengthDesign (ASD) methodsare supported for checks in theULS.l Positive & negative flexural strength is evaluated per AISC 360- 10,
Chapter I2.l The contribution of concrete slabs to the resistance of steel beams in the
final composite stage is taken into account via calculated effectivewidth;l Shear strength (including shear buckling) isevaluated per AISC 360-10,
Chapters I4 &G2.l The strength of shear connectors is evaluated per AISC 360- 10
Chapters I3b& I8.l Other detailing provisions (related to concrete slab, steel deckand shear
studs) are taken into account asper AISC 360-10Chapter I.l Serviceability limit state (SLS) checks are performed for both the
construction and final (composite) stages.l Camber can be set asan absolute value or asa value relative to the span
length.l All unity checksvaluesmaybe plotted along the beams in the 3D view, or
listed in tables.
Main advantages of the composite modulel The multi-model approach of the Composite Analysis Model allows for
parallel checks for construction and composite stages to be performedwithoutmodifications to themodel.
l A partial connection between composite slab and steel beams will betaken into account both during the FEM analysis and in the designchecks.
l Creep in the concrete slabs is taken into account during the FEManalysis (using amodular ratio for the concrete Young'smodulus).
l Calculated resistances are based on a plastic distribution of stresses inthe section.
l Support for both longitudinal and transverse alignment of the steelsheeting
l Detailing provisions, e.g., on the spacing and diameter of shearconnectors, are taken into account.
l All unity checks values may be plotted along the beams in the 3Dwindow, or be listed in tables.
l Abrief calculation output in table form.l A detailed calculation output with rendered formulas and intermediate
calculation steps.
