Canal Bridge Structure Over Ems River No. 911 N – Bypass, Germany
The Ems Canal Bridge (KBr), built in the 1930s, will be renovated at DEK-km 78.806N as part of the German Dortmund-Ems Canal (DEK) expansion effort. A double half-through bridge is planned for the new structure, where construction will begin while the shipment is in progress.
Federal Waterways and Shipping Agency, WNA Datteln, Germany
|Structural Design, Superstructure Planning Execution||
Meyer + Schubart VBI, Wunstorf, Germanywww.meyer-schubart.de
|Steel Superstructure Execution||
SEH Engineering GmbH, Hanover, Germany
At the beginning of the renovation, a bypass route will be constructed: The longitudinal insertion of the half-through bridge into the bypass location took place in October 2020. The bridge will be moved to its final position after the second section is complete.
Dlubal's customer Meyer+Schubart from Wunstorf (Germany) provided the structural design as well as the superstructure execution planning. The entire steel superstructure was modeled and designed as a 3D model in RFEM, using planar shell elements.
The half-through bridge spans 205 ft with a total width of 118 ft. It is supported on 108-foot-wide, 22-foot-thick and 18-foot-high abutments. Three spherical supports are provided for each support. In the water-filled operating state, support forces of up to 7,870 kips act on the outer supports.
Between the tail units, the navigable width is 85 ft and the hydraulic width is 92 ft. On the sides (top of the barrier walls) are 16-foot-wide (east side) and 10-foot-wide (west side) service paths. The bridge bottom forms the bottom chord and the service paths form the cross-section top chord for the structural design.
For the design of the canal bridge, variable actions such as hydrostatic + hydrodynamic actions, ice load + ice pressure, temperature, as well as extraordinary actions such as disaster vessel impact (vessel impact with a 6° approach angle), and a sunken vessel load were applied. The structure is designed for 100 years of service life, according to Eurocode.
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In RF-/FOUNDATION Pro, the foundation design requires the definition the corresponding loading (load cases, load combinations, or result combinations) for the different design situations (STR, GEO, UPL or EQU).
RF-/PLATE-BUCKLING Add-on Module for RFEM/RSTAB | Plate Buckling Analysis for Plates with or Without Stiffeners According to 1993-1-5
RFEM/RSTAB Add-on Module RF-IMP/RSIMP | Generation of Geometric Replacement Imperfections and Pre-deformed Replacement Structures
Extension of the RF-/STEEL Warping Erosion module | Lateral -torsional buckling analyzes of members according to the second -order theory with 7 degrees of freedom
RFEM/RSTAB add-on module RF-/JOINTS Steel-Tower | Hinged connections of lattice tower members according to EC 3
RFEM/RSTAB add-on module RF-MOVE/RSMOVE | Load case generation for members from moving load positions
RFEM/RSTAB add-on module RF-/JOINTS Steel-Column Base | Hinged and restrained column bases according to EC 3
RFEM/RSTAB add-on module RF-/STEEL BS | Design of steel members according to BS 5950 or BS EN 1993-1-1
RFEM add-on module RF-LOAD-HISTORY | Consideration of plastic deformations from previous load conditions
RFEM/RSTAB add-on module RF-/FE-LTB | Lateral -torsional buckling analysis according to theory II. Order (FEM)
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
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