EN-Kran Short description

This software is used for creating the proofs of competence for single-girder and double-girder bridge cranes and for single- and double-girder suspension cranes according to EN 13001 and EN 15011.

Microsoft operating systems (Windows 95 or higher) and regional settings (locale) with dot or comma as decimal separators are needed. The display should be set to at least 1024*768 pixel and a one-line task bar.

This software System provides the following options:

Control via keyboard and/or mouse; immediate check on correctness.
Storage of all data; permanent changeability and possibility of corrections.
Language of user interface chooseable English or German.
Output language independent of user interface as well selectable in English or German.
(Extendibility to other languages exists)
Password protected administrator. Administrator may allow access for other users (with or without password). Each change of data is recorded.

Calculation of cross-sections:
Cross-section values, centre of shear, principal axis, unit stresses.
Box girders with or without rail over web or in middle of upper flange.
Optional reinforcement with 1/2 H-profile below crab rail.
Box girders with H-Profile below box.
Box girders for cranes with cantilever crabs
Optional: stiffeners, inclined web plates.
H-profiles with or without rail on top.
Simple input of plate width and thickness.
Output with scale representation
Cross-section calculation may be used as a stand alone program.

Calculation of Wheel-Rail contacts acc. EN 13001-3-3:
Point and Line contacts
Limit design contact force (static)
Required hardness depth zm
Limit design contact force (Fatigue)
Calculation of Wheel-Rail contacts may be used as a stand alone program.

Generated by user.
Materials: Costs per quality and dimensions (thickness)
Single girder crabs: (running on underflange) Dimensions (incl. hook path), masses, wind area, load lifting attachment.
     Determination of dynamic factors (stiffness classes HC, hoist drive type HC, hoisting speeds)
Cantilever crabs: Lateral support or support below upper flange. Dimensions (incl. hook path), masses, wind area, load lifting attachment.
     Determination of dynamic factors (stiffness classes HC, hoist drive type HC, hoisting speeds)
Double girder crabs: (running on top or on underflange) Dimensions (incl. hook path), masses, wind area, load lifting attachment.
     Determination of dynamic factors (stiffness classes HC, hoist drive type HC, hoisting speeds)
     Wheel flanges or guide rollers.
End carriages: Dimensions, masses, materials, wheel base range, connection to bridge girder lateral or on top.
     Middle hinges or elastic hinges for 8 wheel cranes.
     Lateral end carriage-connection: Different variants of friction grip connections (with or without distance washer, distance pipe), up to 15 pairs of bolts (also with double column).
     End carriages for suspension cranes: 2 variants lateral of runway and 2 variants below crane runway
     Position of bolts. (Bolt quality and further details are used for the proof of competence).
     End carriage-connection welded and bolt connetctions with thread in end carriage plates.
     End carriage-connection on top of end carriage
     End carriages with H-profiles and wheel blocks (2 variants)
     End carriages guide rollers (optional): in front or behind crane wheels
Drives of crab and crane: Dead weight, position of centre of gravity, speed, accelerations, drive forces.
Buffer: Type A, B, C (acc. To EN 13001) , dead weight, maximum buffer path and force.
Stiffeners: Dimensions and cost per meter (Material and manufacturing costs) to be used in optimization of girder
Interface function: It is possible to copy data for crabs and end carriages of component manufacturers into the database.
Simple variant generation by copying and modifying

Projects for single- and double girder cranes
(Each crane = one project, to be addressed by an individual designation)
No limitation of the number of projects. Projects can be copied and modified.

Per project:

Basic data:
Load capacity and span.
Specification of classes U, Q, C, A, D and P or determination of classes by number of cycles, mean paths or
     calculation of load spectrum factor kQ.
Risk factor, static and dynamic test load, data of crane rails.
In door or out door operation (Wind loads).

Crane data:
Flanged wheels or guide rollers (choice of side), slack of the guide means
End carriages to be taken out of database
Up to 3 crabs (to be taken out of database), orientation of crabs.
Optional: Asymmetric end carriages for single girder bridge cranes
Double girder bridge cranes: underflange crabs possible
Up to 10 additional masses and/or up to 10 uniform masses on girder (mass and position)
Suspension cranes with cantilevers (different lengths possible)
Double girder suspension cranes: optional end member at end of cantilevers
Cantilever crab cranes: excentricity of main girder

Crane with 2 or 4 drives (or 8 drives for endcarriages with hinges). Can be copied from database, may be modified or individually entered.
Buffers can be copied from database, may be modified or individually entered.
Mechanical coupled drives possible, rigid load guide possible.
Optional: Data for wheel-rail contacts of crane wheels and guide rollers

Bridge girders (Cross sections):
Dimensions and types as shown above. Additional data: Materials, diaphragm, stiffeners, welds
Double girder crane: Two different girders possible.
Double girder crane: A-type crab rails possible. Effect of elastic padding may be preset.
Intermediate bending in web (calculated from load carrying percentage of flanges) where rails are above web.
Secondary bending in upper flange with rails in the middle: may be preset or calculated internally.

End carriage connections:
Bolted or welded.
Basic data may be copied from database. Bolts: Friction coefficient, scatter, design preloading force.
Welds head plate - bridge girder or bridge girder - end carriage.

Data for the proof of fatigue strength:
Stress history parameters or S-classes (middle if bridge, crab rail or underflange, end carriage and end carriage connection) and wheel-rail contacts can be specified.
Program module to calculate stress history parameters:
Crane and crab movements and load lifting and lowering either simultaneously or separate.
Work cycles: Per day or percentage (crab movements with load specified by start and end position on bridge, target position of subsequent movement without load)
For all welded details or bolts: detailed requirements acc. to EN 13001-3-1 for the determination of delta-sigma-C values.
Wheel/rail contacts: required data (materials, dimensions ..) for determination of FRd,f - limits acc. to EN 13001-3.3

Optimization of bridge girders:
Automatic search of cost-optimised box girder taking into account all load cases according to EN 13001-2.
Specification of "design rules" for all girder types in database. These rules can be modified per project-
Specification of possible plate thicknesses, stepped plate widths and materials to be used.
Specification of diaphragm width depending on the flange width. Specification of minimum protrusions.
Specification of maximum deflection and minimum natural frequencies.
Specification of rules of dependencies (e.g. stiffener size depending on web thickness)
The resulting cross section shall fulfil all proofs of competence and proofs of fatigue strength acc. to EN 13001-3-1.

Proofs of competence and output of results:
All results may be displayed on the screen and can either immediately or later be output by various print media or as PDF.
Output of the complete project data and results or only of a selection (.e.g. maximum stresses only).
Analysis of internal forces by means of a calculation as beam structure.
Output of internal forces for all basic loads without fctors.
Proofs of competence of static strength shall be shown for the middle of bridge girders, cantilevers, end carriages, end carriage connections (for each case for the relevant most unfavourable crab position).
     For each load combination the relevant dynamic factors and partial safety factors are applied and the stresses in plates, welds and for buckling are calculated.
     For the end carriage connections the proof for the bolts is performed.
Optional: Proof of static strength and fatigue strength of rail-wheel contacts.
The proof of the fatigue strength is performed for all chosen details.
As EN 13001 does not give requirements for the minimum stiffness of stiffeners, a check of the requirements of the DIN 4114 is applied.
Check of lateral-torsional stability of H-profile girders with top running crabs.
The crane loads on the crane runway are calculated (Presentation acc. EN 13001 and EN 1991-3)
The functionalities (deflection, natural frequencies) are calculated.
Table of transport data (dead weights and dimensions)

Program maintenance (after revisions or amendments of EN 13001 or EN 15011) as well as further development (downward compatible) is assured.