2971x

2016-08-22

SHAPE-THIN | Cross-Section Properties and Stresses

SHAPE-THIN determines the section properties and stresses of any open, closed, built-up, or non-connected cross-sections.

Section Properties
- Cross-sectional area A
- Shear areas A_y, A_z, A_u, and A_v
- Centroid position y_S, z_S
- moments of area 2 degrees I_y, I_z, I_yz, I_u, I_v, I_p, I_p,M
- Radii of gyration i_y, i_z, i_yz, i_u, i_v, i_p, ip,M
- Inclination of principal axes α
- Cross-section weight G
- Cross-section perimeter U
- torsional constants of area degrees I_T, I_T,St.Venant, I_T,Bredt, I_T,s
- Location of the shear center y_M, z_M
- Warping constants I_ω,S, I_ω,M or I_ω,D for lateral restraint
- Max/min section moduli S_y, S_z, S_u, S_v, S_ω,M with locations
- Section ranges r_u, r_v, r_M,u, r_M,v
- Reduction factor λ_M
Plastic Cross-Section Properties

Axial force N_pl,d
Shear forces V_pl,y,d, V_pl,z,d, V_pl,u,d, V_pl,v,d
Bending moments M_pl,y,d, M_pl,z,d, M_pl,u,d, M_pl,v,d
Section moduli Z_y, Z_z, Z_u, Z_v
Shear areas A_pl,y, A_pl,z, A_pl,u, A_pl,v
Position of area bisecting axes f_u, f_v,
Display of the inertia ellipse

Statical Moments

First moments of area Q_u, Q_v, Q_y, Q_z with location of maxima and specification of shear flow
Warping coordinates ω_M
moments of area (warping areas) S_ω,M
Cell areas Am of closed cross-sections

Stress

Normal stresses σ_x due to axial force, bending moments, and warping bimoment
Shear stresses τ from shear forces as well as primary and secondary torsional moments
Equivalent stresses σv with customizable factor for shear stresses
Stress ratios, related to limit stresses
Stresses for element edges or center lines
Weld stresses in fillet welds

Shear Wall Sections

Section properties of non-connected cross-sections (cores of high-rise buildings, composite sections)
Shear wall shear forces due to bending and torsion

Plastic Design

Plastic capacity design with determination of the enlargement factor αpl
Check of the c/t-ratios following the design methods el-el, el-pl or pl-pl according to DIN 18800

SHAPE-THIN Cross-Section Properties Program | "Cross-Section Properties" Result Table

Do you have any questions?

Events

2024-05-15

Online Training

RFEM 6 | Students | Introduction to Steel Design

2024-05-16

Consideration of Construction Stages in RFEM 6

Webinar

Consideration of Construction Stages in RFEM 6

2024-05-29

$Steel Structures in RFEM 6 \n Part 1: Modeling, Load Input$

Webinar

Modeling and Design of Steel Structures in RFEM 6 | Part 1: Modeling, Load Input

2024-06-06

$Steel Structures in RFEM 6 \n Part 2: Combinations, Design, Documentation$

Webinar

Modeling and Design of Steel Structures in RFEM 6 | Part 2: Combinations, Design, Documentation

2024-11-06

Online Training

RFEM 6 | Students | Introduction to Steel Design

Videos

Event

Webinar | AISC 360/341-22 Steel Member Design in RFEM 6

Length: 00:00:00 min

Event

Webinar | Connections with Circular Hollow Sections in RFEM 6

Length: 00:50:32 min

Event

Webinar | RWIND 2 - Calculating Wind Loads with CFD Simulation

Length: 00:00:00 min

Product Feature

Sensitivity Coefficient

Length: 00:00:32 min

Product Feature

Component "Plate Cut"

Length: 00:00:53 min

Event

Webinar | Stress Analysis of Stair Models in RFEM 6

Length: 01:05:28 min

Product Feature

Component "Auxiliary Solid"

Length: 00:00:32 min

Product Feature

Plastic Resistance with Variation of Shear Stresses

Length: 00:00:38 min

Event

Webinar | Introduction to Time History Analysis in RFEM 6

Length: 00:57:23 min

Playlist

Models to Download

57x

Steel Structure Connection | AISC 360-22

Model 004859 | Steel Structure | AISC 360/341-22

232x

34x

Steel Structure | AISC 360/341-22

3218x

214x

Steel Structure Column Base

259x

Pedestrian and Cyclist Bridge in Eichstätt, Germany

305x

34x

Steel Structure

367x

High-Bay Racking, China

477x

53x

Steel connection

296x

30x

H-Type Lifting Beam

289x

35x

Steel Silo with Wind Loads | ASCE 7

Knowledge Base Articles

KB 001875 | AISC 341-22 Moment Frame Member Design in RFEM 6

The three types of moment frames (Ordinary, Intermediate, Special) are available in the Steel Design add-on of RFEM 6. The seismic design result according to AISC 341-22 is categorized into two sections: member requirements and connection requirements.

The Steel Design add-on in RFEM 6 now offers the ability to perform seismic design according to AISC 341-16 and AISC 341-22. Five types of seismic force-resisting systems (SFRS) are currently available.

KB 001767 | AISC 341-16 Moment Frame Member Design in RFEM 6

The three types of moment frames (Ordinary, Intermediate, Special) are available in the Steel Design add-on of RFEM 6. The seismic design result according to AISC 341-16 is categorized into two sections: member requirements and connection requirements.

KB 001768 | AISC 341-16 Moment Frame Connection Strength in RFEM 6

Moment frame design according to AISC 341-16 is now possible in the Steel Design add-on of RFEM 6. The seismic design result is categorized into two sections: member requirements and connection requirements. This article covers the required strength of the connection. An example comparison of the results between RFEM and the AISC Seismic Design Manual [2] is presented.

Screenshots

SHAPE-THIN Cross-Section Properties Program | "Cross-Section Properties" Result Table

SHAPE-THIN Cross-Section Properties Program | Results - Distribution of Plastic Normal Stresses

Model 004864 | Steel Structure Connection | AISC 360-22

Steel Joints Promotion

Wind Load Deformation of the Bridge in RSTAB 9 | © grbv

Model 004859 | Steel Structure | AISC 360/341-22

Model of Reception Building in RSTAB 9 | © zapf & co.

Model of Markas Headquarters, Italy | © ATP/Bause

The Pipe Support with Deformation Results

Product Features

SHAPE-THIN Cross-Section Properties Software | Section Properties of Thin-Walled Cross-Sections, Elastic and Plastic Design

Modeling of the cross-section via elements, sections, arcs, and point elements
Expansible library of material properties, yield strengths, and limit stresses
Section properties of open, closed, or non-connected cross-sections
Ideal section properties of cross-sections consisting of different materials
Determination of weld stresses in fillet welds
Stress analysis including design of primary and secondary torsion
Check of c/t-ratios
Effective cross-sections according to
- EN 1993-1-5 (including stiffened buckling panels according to Section 4.5)
- EN 1993-1-3
- EN 1999-1-1
- to DIN 18800-2
Classification according to
- EN 1993-1-1
- EN 1999-1-1
Interface with MS Excel to import and export tables
Printout report

All results can be evaluated and visualized in an appealing numerical and graphical form. Selection functions facilitate the targeted evaluation.

The printout report corresponds to the high standards of RFEM and rstab/rstab-9/what-is-rstab RSTAB. Modifications are updated automatically.

SHAPE-THIN Cross-Section Properties Program | Calculation Parameters: c/t-Parts and Effective Cross-Section

SHAPE-THIN calculates all relevant cross‑section properties, including plastic limit internal forces. Overlapping areas are set close to reality. If cross-sections consist of different materials, SHAPE‑THIN determines the effective cross‑section properties with respect to the reference material.

In addition to the elastic stress analysis, you can perform the plastic design including interaction of internal forces for any cross‑section shape. The plastic interaction design is carried out according to the Simplex Method. You can select the yield hypothesis according to Tresca or von Mises.

SHAPE-THIN performs a cross-section classification according to EN 1993-1-1 and EN 1999-1-1. For steel cross-sections of cross-section class 4, the program determines effective widths for unstiffened or stiffened buckling panels according to EN 1993-1-1 and EN 1993-1-5. For aluminum cross-sections of cross-section class 4, the program calculates effective thicknesses according to EN 1999-1-1.

Optionally, SHAPE‑THIN checks the limit c/t-values in compliance with the design methods el‑el, el‑pl, or pl‑pl according to DIN 18800. The c/t-zones of elements connected in the same direction are recognized automatically.

SHAPE-THIN Cross-Section Properties Program | Global Calculation Parameters

SHAPE-THIN includes an extensive library of rolled and parameterized cross-sections. They can be composed or supplemented by new elements. It is possible to model a section consisting of different materials.

Graphical tools and functions allow for modeling complex section shapes in the usual way common for CAD programs. The graphical entry provides the option of setting point elements, fillet welds, arcs, parameterized rectangular and circular sections, ellipses, elliptical arcs, parabolas, hyperbolas, spline, and NURBS. Alternatively, it is possible to import a DXF file that is used as the basis for further modeling. You can also use guidelines for modeling.

Furthermore, parameterized input allows you to enter model and load data in a specific way so they depend on certain variables.

Elements can be divided or attached to other objects graphically. SHAPE-THIN automatically divides the elements and provides for an uninterrupted shear flow by introducing dummy elements. In the case of dummy elements, you can define a specific thickness to control the shear transfer.

Frequently Asked Questions (FAQ)

How do I define a plastic hinge in RFEM 6?

How can I exchange data between RFEM 6 / RSTAB 9 and IDEA StatiCa?

How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?

In the Steel Design add-on, I have set the boundary conditions in such a way that the I-beam flange is restrained against the horizontal displacement. I then calculated the critical load factors using the Structure Stability add-on, but with no effect on the critical load factor value. What is the reason for this?

Can I estimate which minimum cross-sections I should use before starting to design my model?

How do I define a pipe as a shear key in RF‑/JOINTS Steel – Column Base add-on module?

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