CRANEWAY designs crane girders according to EN 1993-6:2008-09, DIN 4132:1981-02 and DIN 18800:1990-11. Data for the crane girder is entered in the stand-alone program CRANEWAY. For design according to EN 1993-6 it is possible to select the crane type (bridge crane or suspension crane).
Features
-Stress design for crane runway and welds
-Analysis of fatigue behavior and fatigue design for crane runway and welds
-Deformation analysis
-Plate buckling design for wheel load introduction
-Stability analysis for lateral torsional buckling according to second-order analysis for torsional buckling (1D FEA element)
For design according to Eurocode 3 the following National Annexes (NAs) are available:
-DIN EN1993-6/NA:2010-12 (Germany)
-CSN EN1993-6/NA:2010-03 (Czech Republic)
-SFS EN1993-6/NA:2010-03 (Finland)
-CYS EN1993-6/NA:2010-03 (Cyprus)
-UNI EN1993-6/NA:2011-02 (Italy)
-NBN EN1993-6/NA:2011-01 (Belgium)
In addition to the NAs listed above, you can specify user-defined NAs with your own factors.
Input
CRANEWAY provides different clearly arranged input tables for geometry, material, cross-sections, actions and imperfections:
Geometry
-Quick and comfortable data input
-To define the support conditions, various support types are available (hinged, hinged movable, rigid and user-defined as well as lateral on upper or bottom flange).
-Optionally, a warping restraint can be selected.
CRANEWAY cross-sections
-I-shaped rolled cross-sections (I, IPE, IPEa, IPEo, IPEv, HE-B, HE-A, HE-AA, HL, HE-M, HE, HD, HP, IPB-S, IPB-SB, W, UB, UC and other cross-section tables according to AISC, ARBED, British Steel, Gost, TU, JIS, YB, GB etc.) can be combined with section stiffener on the upper flange (angles or channels) as well as rail (SA, SF) or splice with user-defined dimensions.
-Unsymmetrical I-sections (type IU) can also be combined with stiffeners on the upper flange as well as with rail or splice.
Actions
Actions from up to three simultaneously operated cranes can be taken into account. In the simplest case, you select a standard crane from the library, but input can be defined also manually:
-Number of cranes and crane axles (maximum: four per crane), center distances, position of crane buffers
-Classification according to EN 1993-6 into damage class with editable dynamic factors, and according to DIN 4132 into lifting class and exposure category
-Vertical and horizontal wheel loads due to self-weight, lifting capacity, mass forces from drive as well as skewing
Imperfections
-The imperfection load is applied with view to the first eigenvibration mode, either identically for all load combinations to be calculated or individually for each load combination as eigenmodes may vary depending on the load.
-CRANEWAY offers comfortable tools for scaling the eigenmodes (determination of rises for inclination and camber).
Calculation
During the calculation CRANEWAY creates crane loads in predefined distances as load cases for the crane runway. The load increment for cranes moving across the crane runway can be set individually.
For each crane position CRANEWAY analyzes three load cases from the main and secondary loads.
In addition, CRANEWAY provides comprehensive setting options to control the FE calculation (length of finite elements, stop criteria etc.).
CRANEWAY calculates the internal forces on particular x-locations along the crane girder according to second-order analysis for torsional buckling in the imperfect system.
A local exceeding of limit stresses according to DIN 18800 part 1, el. 749 can be allowed.
Results
Analysis results are arranged in tables, sorted by different topics. The table values are always shown together with the corresponding cross-section graphic. Furthermore, it is possible to represent every intermediate value.
General stress design
CRANEWAY carries out general stress design for the crane girder by calculating the existing stresses and contrasting them with the limit normal, the limit shear and the limit equivalent stresses. General stress design is performed as well for welds with regard to parallel and vertical shear stresses and their superposition.
Fatigue design
Fatigue design is performed for up to three cranes operating at the same time, based on the concept of nominal stress according to EN 1993-1-9.
When fatigue is analyzed in accordance with DIN 4132, CRANEWAY records the stress curve of crane passages for each stress point to evaluate data according to the Rainflow method.
Buckling analysis
Buckling is analyzed by taking into account a local introduction of wheel loads according to EN 1993-6 or DIN 18800-3.
Deformation analysis
Deformation analysis is carried out separately for the vertical and horizontal direction. Calculated displacements are compared with the allowed values. The allowable deformation ratios can be specified individually in the calculation parameters.
Lateral-torsional buckling analysis
The torsional-flexural buckling analysis is performed according to second-order analysis for torsional buckling considering imperfections. The general stress design must be fulfilled and the critical load factor must not be smaller than 1.00. Therefore, CRANEWAY displays the corresponding critical load factor for all load combinations of the stress design.
Support forces
CRANEWAY determines all support forces from the characteristic loads.
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