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The transition from experimental studies to the realm of numerical simulations is often necessary for further studies, but very difficult at the same time. This is especially the case for extended seismic analysis and earthquake-resistant design. This paper describes an approach to moving from the experimental testing of an elementary part of a wood-frame building structure to a numerical model, with the use of a commercial engineering analysis software. In the presented approach, a timber-frame structure with polyurethane (PU)-foam insulation and OSB (oriented strand board) sheathing was exposed to dynamic excitation. The results were then used to generate a numerical 3D model of the wooden frame element. The process of creating the 3D model is explained with the necessary steps to reach validation. The details of the model, material properties, boundary conditions, and used elements are presented. Furthermore, the authors explain the technical possibilities for simplifying the numerical model in used software. Simplifying the model leads to a substantial reduction of calculation time without the loss of accuracy of results. Such a simplification is especially useful when conducting advanced numerical calculations in the field of seismic and dynamic resistant object design.
Marcin Szczepański; Wojciech Migda. Analysis of Validation and Simplification of Timber-Frame Structure Design Stage with PU-Foam Insulation. Sustainability 2020, 12, 5990 .
AMA StyleMarcin Szczepański, Wojciech Migda. Analysis of Validation and Simplification of Timber-Frame Structure Design Stage with PU-Foam Insulation. Sustainability. 2020; 12 (15):5990.
Chicago/Turabian StyleMarcin Szczepański; Wojciech Migda. 2020. "Analysis of Validation and Simplification of Timber-Frame Structure Design Stage with PU-Foam Insulation." Sustainability 12, no. 15: 5990.
Pounding between adjacent buildings during ground motion may result in structural damage or lead to total destruction of structures. The research on the phenomenon has recently been much advanced; however, the analyses have been carried out only for concrete, steel, and masonry structures, while pounding between wooden buildings has not been studied so far. The aim of this paper is to show the results of detailed non-linear seismic analysis of inter-story pounding between the wood-framed buildings modelled by using the finite element method. Firstly, the modal analysis of the structures was conducted. Then, the detailed non-linear analysis of earthquake-induced collisions between two wood-framed buildings of different heights was carried out. The results of the analysis indicate that the behavior of both structures in the longitudinal as well as in the transverse direction is significantly influenced by interactions. The response of the taller building is increased in both directions. On the other hand, the response of the lower building is decreased in the longitudinal direction, while it is increased in the transverse one. The results of the study presented in the paper indicate that, due to deformability of buildings made of wood, structural interactions may change their responses much more, as compared to steel, reinforced concrete, or masonry structures.
Wojciech Migda; Marcin Szczepański; Natalia Lasowicz; Anna Jakubczyk-Gałczyńska; Robert Jankowski. Non-Linear Analysis of Inter-Story Pounding between Wood-Framed Buildings during Ground Motion. Geosciences 2019, 9, 488 .
AMA StyleWojciech Migda, Marcin Szczepański, Natalia Lasowicz, Anna Jakubczyk-Gałczyńska, Robert Jankowski. Non-Linear Analysis of Inter-Story Pounding between Wood-Framed Buildings during Ground Motion. Geosciences. 2019; 9 (12):488.
Chicago/Turabian StyleWojciech Migda; Marcin Szczepański; Natalia Lasowicz; Anna Jakubczyk-Gałczyńska; Robert Jankowski. 2019. "Non-Linear Analysis of Inter-Story Pounding between Wood-Framed Buildings during Ground Motion." Geosciences 9, no. 12: 488.
Wood frame buildings are very popular in regions that are exposed to different dynamic excitations including earthquakes. Therefore, their seismic resistance is really important in order to prevent structural damages and human losses. The aim of the present paper is to show the results of experimental tests focused on the dynamic response of wall panels of a wooden frame building with thermal isolation made of mineral wool and polyurethane foam. Firstly, the static and the dynamic mechanical analysis (DMA) tests were conducted so as to determine the basic thermomechanical properties of the analyzed isolation materials. Then, the elements of the exterior walls with two types of thermal insulation were tested under harmonic excitation for different amplitudes of displacement. The results of the static material tests indicate that the polyurethane foam behaves in a highly nonlinear way both during compression and tension. Moreover, the results of the DMA tests show that the storage and loss modulus of the polyurethane foam are significantly larger in relation to the values obtained for the mineral wool. The results of the dynamic tests on wall panels show that the use of polyurethane foam as thermal isolation leads to a substantial increase in stiffness and damping properties, as compared to the case when the mineral wood is used.
Marcin Szczepański; Wojciech Migda; Robert Jankowski. Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation. Applied Sciences 2019, 9, 4387 .
AMA StyleMarcin Szczepański, Wojciech Migda, Robert Jankowski. Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation. Applied Sciences. 2019; 9 (20):4387.
Chicago/Turabian StyleMarcin Szczepański; Wojciech Migda; Robert Jankowski. 2019. "Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation." Applied Sciences 9, no. 20: 4387.