Parametrical Study of the Shear Resistance of the Approach Slabs

Abstract:

The transition zone of the road bridges is located right behind the abutment. Function of this structure is to ease the vehicle transition from the bridge on the rigid support to the embankment with much smaller stiffness. The main function of the approach slab is, as a part of the transition zone, helping the backfill to overcome different stiffness of the bridge foundations and embankment. The paper deals with shear resistance of the slabs for different lengths and widths. Parametrical study was performed according to Eurocode loading model 1 (Uniformed distributed load and Tandem system). Each of the analysed slabs was loaded with sets of different TS positions and location of the loading lanes. Envelopes of the shear forces of the approach slabs were analysed for each type of the slab. After that shear resistance of the slab with or without the shear reinforcement was calculated. The slab was divided into areas with same shear reinforcement distribution. The analysis is the part of the engineering tool for the bridge designers. According to length and width of the slab, the engineer can easily choose the shear reinforcement diameter and its distribution. The tool also provides the construction details of the shear reinforcement. There will be also the option for the reinforcement design of the slab, with hints for the structural scheme and calculation method.

• Periodical: Solid State Phenomena (Volume 272)
• Pages: 256-261
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.272.256
• Online since: February 2018
• Authors: Kamil Laco*, Viktor Borzovič
• Keywords: Approach/Transition Slab, Shear Resistance, Transition Zone

References

[1] OTN 73 6244: Transition zones of the roadway and highway bridges. Praha, 1981. (in Slovak).

[2] K. Laco, V. Borzovič, J. Panuška, Analysis of the behaviour of the approach slab, in: Concrete days 2014 a 5. post-conference colloquium SNK fib : Collective volume, 1. edition, Bratislava : STU in Bratislava, 2014, ISBN 978-80-8076-114-1, pp.303-308.