83 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
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