@article{HombGuigouCarterRabold2017, author = {Homb, Anders and Guigou-Carter, Catherine and Rabold, Andreas}, title = {Impact sound insulation of cross-laminated timber/massive wood floor constructions. Collection of laboratory measurements and result evaluation}, series = {Building Acoustics}, volume = {2017}, journal = {Building Acoustics}, number = {24/1}, pages = {35 -- 52}, year = {2017}, abstract = {Wooden building systems, including cross-laminated timber elements, are becoming more common. The last few years have seen new developments and documentation of innovative types of cross-laminated timber floor assemblies. Regarding impact sound associated to walking persons, running or jumping children, such floor assemblies can be regarded as a weak part. So far, there are no reliable standardized calculation models available, for prediction of impact sound in the entire frequency range. Therefore the design is always based upon previous experiences and available measurements. This article presents the results of a number of well controlled sound insulation measurements of cross-laminated timber/massive wood floor constructions conducted in laboratories. The collection of data and results analysis highlight some basic phenomena. For instance, how structural differences related to the grouping of the constructions change the frequency distribution of the impact sound level and the single number quantities. Another significant result is the influence of the dynamic stiffness of the resilient interlayer of floating floor systems and the mass per unit area of the floors. Based on this analysis, the aim is to identify similarities and carry out simplifications. The data will be further processed and used in the development of prediction models and optimization process of cross-laminated timber floor assemblies.}, language = {de} } @article{PaoliniKollmannsbergerWinteretal.2017, author = {Paolini, Alexander and Kollmannsberger, Stefan and Winter, Christoph and Buchschmid, Martin and M{\"u}ller, Gerhard and Rabold, Andreas and Mecking, Simon and Schanda, Ulrich and Rank, Ernst}, title = {A high-order finite element model for vibration analysis of cross-laminated timber assemblies}, series = {Building Acoustics}, volume = {2017}, journal = {Building Acoustics}, number = {3}, edition = {24}, pages = {135 -- 158}, year = {2017}, abstract = {The vibration behavior of cross-laminated timber components in the low-frequency range can be predicted with high accuracy by the finite element method. However, the modeling of assembled cross-laminated timber components has been studied only scarcely. The three-dimensional p-version of the finite element method, which is characterized by hierarchic high-order shape functions, is well suited to consider coupling and support conditions. Furthermore, a small number of degrees of freedom can be obtained in case of thin-walled structures using p-elements with high aspect ratios and anisotropic ansatz spaces. In this article, a model for cross-laminated timber assemblies made of volumetric high-order finite elements is presented. Two representative types of connections are investigated, one with an elastomer between the cross-laminated timber components and the other without. The model is validated, and suitable ranges for the stiffness parameters of the finite elements which represent the junctions are identified.}, language = {en} } @article{RaboldSchneiderFischeretal.2020, author = {Rabold, Andreas and Schneider, Martin and Fischer, Heinz-Martin and Zeitler, Berndt}, title = {Neue Berechnungsverfahren zur Trittschall{\"u}bertragung}, series = {Bauphysik}, volume = {42}, journal = {Bauphysik}, number = {4}, doi = {10.1002/bapi.202000013}, pages = {160 -- 172}, year = {2020}, abstract = {Die Berechnung des bewerteten Norm-Trittschallpegels im Bau L'n,w erfolgt aktuell in der DIN 4109-2:2018 sowohl f{\"u}r den Massivbau als auch f{\"u}r den Holz-, Leicht- und Trockenbau unter Ber{\"u}cksichtigung relativ pauschaler Korrekturen f{\"u}r die flankierende Schall{\"u}bertragung. Dar{\"u}ber hinaus unterliegen die derzeitigen Verfahren einigen weiteren gravierenden Beschr{\"a}nkungen des Anwendungsbereiches, die eine {\"U}berarbeitung der Verfahren w{\"u}nschenswert erscheinen lassen. Basierend auf dem neuen vereinfachten Verfahren der DIN EN ISO 12354-2:2017 werden deshalb Berechnungsverfahren auf der Basis von Einzahlangaben vorgestellt, mit denen die direkte und die flankierende Trittschall{\"u}bertragung, wie beim Luftschall, getrennt berechnet und anschließend aufsummiert werden. Hierdurch ergeben sich deutlich bessere M{\"o}glichkeiten, die tats{\"a}chliche Bausituation im Rechenmodell abzubilden und somit eine bessere {\"U}bereinstimmung zwischen dem prognostizierten und einem gemessenen Wert zu erhalten. Im Massivbau kann beispielsweise eine Vorsatzkonstruktion im Empfangsraum vor dem trennenden oder dem flankierenden Bauteil entsprechend ihrer schalltechnischen Wirkung ber{\"u}cksichtigt werden. Weiterhin k{\"o}nnen auch horizontale oder diagonale {\"U}bertragungssituationen oder die Trittschall{\"u}bertragung von Treppen abh{\"a}ngig von der jeweiligen baulichen Situation berechnet werden. Die neuen Berechnungsverfahren erm{\"o}glichen damit eine wirtschaftlichere Dimensionierung der Bauteile.}, language = {de} } @article{MeckingRaboldHuber2019, author = {Mecking, Simon and Rabold, Andreas and Huber, Anton}, title = {Insulation materials made of renewable raw materials for the sound insulation prognosis of building components}, series = {Proceedings of ICA 2019}, journal = {Proceedings of ICA 2019}, year = {2019}, language = {en} } @article{RaboldMarxtSchanda2023, author = {Rabold, Andreas and Marxt, Michaela and Schanda, Ulrich}, title = {Geeignete Beurteilungsgr{\"o}ßen f{\"u}r die Luftschalld{\"a}mmung von Haustrennw{\"a}nden - Bewertung der Schalld{\"a}mmung bei {\"u}blichen Wohnger{\"a}uschen}, series = {Bauphysik}, volume = {45}, journal = {Bauphysik}, number = {1}, doi = {10.1002/bapi.202200038}, pages = {21 -- 34}, year = {2023}, language = {de} }