Conceptual Design of Wolbecker Road Bridge No. 76 in Münster, Germany
Starting in 2018, an architecturally appealing tied-arch bridge will arise in Münster, Germany. The new road bridge will be built othe Dortmund-Ems Canal with a span of 67.20 m. It will replace the existing classic arch bridge, built in 1957, which has the span length about 5 m lesser.
Wasser- und Schifffahrtsamt Rheine, Germany
DISSING+WEITLING architecture, Copenhagen, Denmark
|Building and Structural Planning||
grbv Ingenieure im Bauwesen GmbH & Co. KG, Hanover, Germany
The Wolbecker road bridge No. 76 is a part of the infrastructure project 'Extension of the Dortmund-Ems Canal'. In addition to the clearance width extension, the clearance height of the new bridge will also be increased for the shipping traffic. As a result of broadening the canal section, the waterway can be used in future by more efficient ships, running with a reasonable speed.
In cooperation with the design and architectural office Dissing + Weitling from Copenhagen, the Dlubal Software customer grbv Ingenieure im Bauwesen GmbH & Co. KG from Hanover carried out the preliminary and conceptual design for the upcoming replacement construction.
Structure and Design
After considering several variants, the design of the 'hyperbolic arch with orthotropic roadway slab' has been accepted.
The freestanding hyperbolic arches are round tubes with d = 711 mm and an arch rise of 15.50 m. As all other components of the superstructure, the steel material of the grade S 355 J2+N is used. The only exception are the fan-shaped round steel hangers with d = 70 mm and the steel grade of S 460 NL.
The loads on the bridge deck are transferred to the pipe bends by the hanger. The reinforcing girders act as tension chords to absorb the bow thrust ('bowstring-girder bridge').
In the course of the very detailed design, the arch bridge was modelled as a spatial beam structure in RSTAB. The design was carried out for load model 1 according to DIN EN 1991-2 (αQ1 = 1.0) with the National Annex.
The new Wolbecker road bridge is an extraordinary bridge structure, which is different from the conventional tied-arch bridges.
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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).
Side view (top) and representation of the 1st Buckling of the Wolbecker road bridge in RSTAB (© grbv)
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
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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Programs Used for Structural Analysis
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions
Stress analysis of steel members
Design of steel members according to Eurocode 3
Stability analysis according to the eigenvalue method