BS EN 16727-1:2018 pdf download

BS EN 16727-1:2018 pdf download.Railway applications – Track – Noise barriers and related devices acting on airborne sound propagation – Non-acoustic performance
1 Scope
This document applies only to noise barriers composed of posts as structural elements and panels as acoustic elements (fabricated for example from metal, timber, plastic or concrete panels). It also applies for acoustic claddings of existing walls and partial or total acoustic coverings of the rail track. It is important that acoustic elements are tested together with the structural elements to represent the noise barrier as in the intended use. This document provides criteria to verify railway noise barriers and related devices according to basic mechanical performance under standard conditions of exposure, irrespective of the materials used. A range of conditions and optional requirements is provided to allow for the wide diversity of practice within Europe. Individual aspects of performance are covered separately in the annexes. This document provides test methods and criteria for the assessment of railway noise barriers with respect to their mechanical performance and stability under static loading.
5.4.2 Material testing
Material testing can be necessary for obtaining the relevant material properties for calculation of the resistance of the noise barrier. These tests are also necessary to obtain material- dependence factors and conversion factors; e.g. for temperature, ageing and load duration. The material testing shall follow the relevant material standards taking into account the design criteria defined in this European Standard. For the purpose of this European Standard a minimum number of 10 tests (and if relevant out of three different production batches) is required to obtain the material properties [e.g. Young’s modulus or yield strength). For determination of the material-dependent influences, five comparison tests are sufficient if the spread of the results is low. Analysis of the test results to determine the characteristic value Rk shall be undertaken in accordance with EN 1990:2002, D.5, (1), a] which concerns the assessment of a ‘characteristic value’ divided by a ‘partial factor’. For most materials used in noise barriers, the material-dependent influences are covered in the relevant Eurocode. For amorphous plastic materials the influence of load duration, temperature and ageing shall be taken into account according to ETAG 010:2002, 6.3.1.2 and Annex H.
5.4.3 Full scale testing
The full scale testing shall be undertaken on a segment of the noise barrier in a standard climate in accordance with EN ISO 291. If it is suspected that temperature will influence the outcome significantly because the relevant characteristic value changes significantly, then this shall be accounted for using the temperature range set out in this standard (5.2). The test specimens shall be taken from at least three different batches. Analysis of the test results to determine the characteristic value Rk shall be undertaken in accordance with EN 1990:2002, D.5, (1), a] which concerns the assessment of a ‘characteristic value’ divided by a‘partial factor’.