AUTOMATED EN 12354 CALCULATIONS OF ENTIRE BUILDINGS: SONARCHITECT ISO

Authors

Manuel A. Sobreira-Seoane, Alfonso Rodríguez-Molares, Julio Martín-Herrero and Cástor Rodríguez-Fernández

Abstract

Building designers are currently subjected to strict requirements on acoustic insulation. These requirements usually  stem from local Building Codes. A traditional approach to the assessment of the acoustic insulation compliance of a building is to assume that a few pairs
of rooms can be located that represent the worst performance in the building. The selection of the critical pairs usually relies on  the acoustic expertise of the designer. Then, typically,software tools that analyze the behavior of a pair of rooms according to a set of more or less flexible typologies are used to assess the acoustic performance of the selected pairs, which acts then as an indicator of the compliance of the entire building. This is far from trivial, and complex geometries are often encountered which  hinder  the intuition of the designer, and also the  reliability of conventional tools. Moreover, the critical pairs, if correctly chosen and modeled,  could suffice to assess the compliance of the building, but do not provide information  on  the overall acoustic performance of the building. We present a new  design tool allowing the computation of EN 12354 in the entire building, taking into account every room in the building, allowing any regular geometry, and reporting the acoustic performance of the entire building. This tool helps to allocate those critical rooms, so it also helps with the acoustic measurements needed to verify the legal requirements. Besides, it opens  the way for a sound insulation quality classification scheme for entire buildings.

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ELABORACIÓN DEL PLAN DE MUESTREO EN EDIFICACIÓN MEDIANTE EL CÁLCULO AUTOMÁTICO DEL AISLAMIENTO ACÚSTICOS DE UN EDIFICIO COMPLETO

Authors

Manuel A. Sobreira-Seoane and Alfonso Rodríguez Molares

Abstract

In this paper, a software tool to calculate the acoustic insulation of a full building is presented. It allows identifying those pairs of rooms having the minimum value of acoustic insulation (airborne, impact and façade), so an efficient sampling planning can be designed, if a
verification of the fulfilment of the established requirements at the CTE DB-HR is required. The calculations based on the family of standards UNE 12354, have been validated with a real building. The results and the sampling planning developed are also presented.

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CÁLCULO NUMÉRICO DEL ÍNDICE DE REDUCCIÓN VIBRACIONAL

Authors

Alfonso RodrÍguez Molares and Manuel A. Sobreira Seoane

Abstract

Following UNE 10848:2007 specifications, the vibration reduction index of croos-joints can be measured in laboratory. Due to its recent publication and the high cost of facilities and equipment
there are not yet, in Spain, available laboratories o®ering such measurement.
Numerical calculation is a clear alternative to the measurement, allowing saving cost and time, although an experimental validation is needed to provide reliable data. This communication
presents a numerical model for the calculation of Kij. The results are compared against measurements in a scale model of the facilities described by the norm.

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ANÁLISIS DE LA CASUÍSTICA DERIVADA DE LA APLICACIÓN DEL CTE

Authors

Alfonso Rodríguez Molares y Manuel A. Sobreira Seoane: Sonitum, Grupo de Acústica Aplicada, Universidad de Vigo

Mª Teresa Carrascal García, Amelia Romero Fernández y Jose Antonio Tenorio Ríos: Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC

Abstract

El nuevo reglamento en materia de protección frente  al ruido del Código Técnico de la Edificación (DB HR) sienta las bases para que los proyectistas calculen los parámetros de calidad acústica en las viviendas mediante un método que proviene del método simplificado la norma europea UNE 12354-1:2000. Dicho método toma como variables de entrada, no sólo los parámetros acústicos de los elementos involucrados, sino también sus dimensiones y las particularidades geométricas de cada par de recintos.

Existe la creencia generalizada de que el caso peor se encuentra cubierto si se considera que ambos recintos presentan las cuatro aristas coincidentes. Esta suposición, que simplifica convenientemente la casuística de aplicación del método de cálculo, es  en general incorrecta y puede, en algunos casos concretos, tener importantes consecuencias sobre el resultado final del cálculo de aislamiento. En este texto se presenta la casuística más habitual incluyendo algunos escenarios en los que existen dos elementos separadores que todavía no han sido incluidos en las hojas de cálculo oficiales. Se analizan asimismo algunas consecuencias de aceptar la simplificación por simetría.

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