VSH Turòa nad Bodvou - Nemetschek Scia

Author: Ing. Ach. Rudolf Kruliac, Ing. Jozef Petrík
Investor: The town of Kežmarok
Statics: Ing. Mirolav Maèièák, Ing. Peter Purtz
Date: June 2005
Construction Parameters
The bridge type: Foot Bridge
Action of statics: Triple-pole suspension construction
Steel construction type: All-welded pylon, rolled IPE bridge floor
profiles with framework stiffeners
Cross angle: with the main channel of the Poprad River
Bridge length: 63,94 m, from this 52,927 m steel construction
Width: 2,95 m
Roadway: wooden fore-and-aft road
Ropes: Steel coiled single-row transformed STN 02 4315 nominal
diameter 35,3 mm /1+6+12+18+24+30/, at the nominal wire resistance
1370 Mpa/mm2 Pylons: All-welded, shaped O
Material:
Steel S 235, steel S 335, S 355 JO
Steel 120 504 R, 10 425 V
Steel cable terminal 35,5 STN 05 4456/E
Broadleaved species Oak - class SI
Concrete C 25/30 A3L T100 according ST 731201
Construction Description
At suspension bridges the main bearing member is a joist, which
span is reduced by leaning cable suspensions - conducted through
pylons and affected on the supports again by leaning tensions.
The function of cables and pylons is evident and comprehensible
at the first sight.
Ropes, cable ropes with a small diameter vanish in the whole
picture and the construction has a very pleasant effect.
Railing: Handrail created by O profile fi 60,3/5 mm, baluster created
by O profile 88,9/4 mm, baluster range 3 m, vertical backing
members are created by O profile 20 mm.
Bridge floor: It is made of wooden planks
Main girders: Rolled IPE 550 with framework stiffeners with theoretical
height 550 mm
Pylons: They are created as O profile 355,6/20, or 355/6/6.5, in the
lower part fixed into the foundation constructions.
Suspensions: Steel coiled single-row transformed STN 054315
nominal diameter 35,3 mm (1+6+12+18+24+30) at the nominal
wire resistance 1370 MPa/mm2 . Direction of anchor plate sheets
must correspond with the rope direction! Tightening force:
drawing number 103.
Joints and tacking of bridge members: Steel construction is allwelded.
Its parts will be made in the manufacture. A weld, alternatively
screwed, makes assembling joints.
According to the results of geological survey the bridge
filling is solved as following
Pylons
Pylons placing will be made on the ferro concrete foundations
beams and piles with a diameter 600 mm, piles will be fixed into the
rock R4, R2 of maxim. force capacity Uv 580kN. Designed height
of pile fixing assumes steady level of watercourse depending on
the heel pile height and mould height along the rock level R4. It
is necessary to write into the building permit that the presence of
a geologist, static expert, building surveyor while pile drilling is a
must with a following prove of fixed pile height, prove of cantilever
pile height (edge R4 and pile heel).
Left foundation rope (LIDL)
Foundation placement will be on piles, which will be fixed into the
rock R4.
Right foundation rope
Foundation placement will be on gravels G3
Bridge calculation (dynamics, geometric non-linearity / Newton
Raphson Method of calculation / dimensioning of sections) was
made by the software SCIA•ESA PT 5.1.81, supplier SCIA SK Žilina,
Nám. hrdinov 5 , 010 03 Žilina, Slovakia.
At the own calculation it was necessary to define correctly the
elasticity rope modulus, which has a big influence by construction
deformation. We have solved very carefully rope prestress, where
the most optimal solution at the respecting have allowed
sagging and rope safety there was by the type of rope
determination as initial tension (SCIA•ESA PT).
According to the result of the own bridge frequency it was
necessary to determine a dynamic coefficient loading.
From the economical point of view the combination of
two main steel profiles IPE with a framework steel stiffeners
was shown as the most optimal solution.
Bridge for pedestrians over the Poprad River
83