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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.
The aim of the article is to analyze three variants of modernization and reconstruction of a road intersection, which in practice is the cause of numerous collisions and accidents. Detailed design solutions are presented for them. The aim of the analyses is to indicate an effective solution that, taking into account technical modifications of the road system elements, will ensure the functionality of the road system to the highest degree and significantly reduce the number of road incidents. To indicate the optimal solution, quantitative data (cost and duration of activities for three options) and qualitative data (determined based on the own experience and knowledge of road industry experts) is analyzed. The authors refer to many criteria of various natures (e.g., economic, technical, functional, environmental, social), which allow for comprehensive consideration of the current requirements of road users and changing circumstances, among others a steady increase in the number of vehicles and growing social expectations in terms of road parameters. Considering the presented analyses and arguments, the authors recommend option 1 as optimal. This is the most expensive solution among those analyzed and with the longest implementation time, however, taking into account the long-term prognosis of the direction and scope of changes to the existing standards and requirements for road infrastructure, it can be stated that option 1 meets them to the highest degree, and also has the greatest potential. The envisaged solution ensures high standards of the quality of road infrastructure use in terms of functionality, capacity, technical parameters, as well as the safety of traffic participants related to the smoothness of the journey, reduction of the number of collisions and accidents.
Marcin Szczepański; Beata Grzyl. Technical and Economic Analysis of the Implementation of Selected Variants of Road Investment. Buildings 2020, 10, 97 .
AMA StyleMarcin Szczepański, Beata Grzyl. Technical and Economic Analysis of the Implementation of Selected Variants of Road Investment. Buildings. 2020; 10 (6):97.
Chicago/Turabian StyleMarcin Szczepański; Beata Grzyl. 2020. "Technical and Economic Analysis of the Implementation of Selected Variants of Road Investment." Buildings 10, no. 6: 97.
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.
Celem artykułu jest ocena budynku mieszkalnego w zabudowie bliźniaczej w świetle obowiązujących przepisów dotyczących energooszczędności oraz analiza czasów i kosztów jego wykonania w dwóch wariantach klasy energetycznej. W ramach analizy wyliczono bilans strat oraz zysków ciepła, na podstawie którego utworzono wskaźniki charakterystyczne. Następnie zaproponowano rozwiązania pozwalające obniżyć te wskaźniki do poziomu dopuszczalnych według obowiązujących i przyszłych przepisów dla budynków jednorodzinnych pasywnych oraz porównano koszty i czasy realizacji budynku tradycyjnego ze zmodernizowanym w kierunku klasy budynku pasywnego.
Mateusz Pankanin; Marcin Szczepański. Uzyskanie standardu pasywnego. BUILDER 2019, 268, 106 -109.
AMA StyleMateusz Pankanin, Marcin Szczepański. Uzyskanie standardu pasywnego. BUILDER. 2019; 268 (11):106-109.
Chicago/Turabian StyleMateusz Pankanin; Marcin Szczepański. 2019. "Uzyskanie standardu pasywnego." BUILDER 268, no. 11: 106-109.
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.
Wood-frame buildings are very common in regions that are exposed to earthquakes. Most of residential buildings are constructed using this technology; therefore, the seismic resistance of them is really essential in order to prevent human losses and structural damage. The aim of the present article is to show the results of the detailed numerical FEM analysis focused on the seismic behaviour of the wood-frame house with different in-wall insulation materials. The results of the study clearly indicate that using polyurethane (PU) foam instead of mineral wool leads to the increase in the rigidity of the structure and, therefore, to the substantial reduction in the structural response under different seismic excitations. The results also show that, generally speaking, the level of reduction in the displacement response increases with the increase in the magnitude of the earthquake, which even furthermore benefits the application of PU foam as an insulation material. It has also been concluded that the method of using PU foam can be successfully applied not only in the newly constructed wood-frame houses but also in existing ones since replacing the mineral wool with PU foam is relatively easy and not so much expensive.
Wojciech Migda; Marcin Szczepański; Robert Jankowski. Increasing the Seismic Resistance of Wood-frame Buildings by Applying PU Foam as Thermal Insulation. Periodica Polytechnica Civil Engineering 2019, 1 .
AMA StyleWojciech Migda, Marcin Szczepański, Robert Jankowski. Increasing the Seismic Resistance of Wood-frame Buildings by Applying PU Foam as Thermal Insulation. Periodica Polytechnica Civil Engineering. 2019; ():1.
Chicago/Turabian StyleWojciech Migda; Marcin Szczepański; Robert Jankowski. 2019. "Increasing the Seismic Resistance of Wood-frame Buildings by Applying PU Foam as Thermal Insulation." Periodica Polytechnica Civil Engineering , no. : 1.
The aim of the article is to present results of seismic analysis results of two real-sized timber frame buildings subjected to seismic excitations. The first model was insulated with mineral wool, the second one with polyurethane foam. Technology and specifications involved in both models construction is based on the previously conducted experimental research on timber frame houses, including wall panels tests, wall numerical models and study on material properties and precisely reflect results of the those research. During the seismic analysis reference node located in buildings were selected. In selected node displacement values were measured and compared between two analyzed models. The results of the numerical analysis presented in the article indicate that the application of polyurethane foam for a skeleton filling of the timber-frame building leads to the increase in stiffness as well as damping of the whole structure, which results in a considerable increase in the seismic resistance of the structure.
Marcin Szczepański; Wojciech Migda. Timber frame houses resistant to dynamic loads - seismic analysis. MATEC Web of Conferences 2018, 219, 01001 .
AMA StyleMarcin Szczepański, Wojciech Migda. Timber frame houses resistant to dynamic loads - seismic analysis. MATEC Web of Conferences. 2018; 219 ():01001.
Chicago/Turabian StyleMarcin Szczepański; Wojciech Migda. 2018. "Timber frame houses resistant to dynamic loads - seismic analysis." MATEC Web of Conferences 219, no. : 01001.
The aim of this article is to present results of a dynamic numerical analysis focused on the response of two timber frame building structures exposed to seismic excitations. The first structure was insulated with mineral wool, while the second one with polyurethane foam. Specifications and technology involved in the models' construction are based on the previously conducted experimental study, upon which numerical structural models were proposed. The displacements of selected node were measured and compared between two models during the numerical investigation. The results of the study confirm that using a polyurethan foam leads to much lower displacement values comparing to the case when the mineral wood is applied as an insulation material. Thus, a positive outcome of using polyurethane foam insulation in timber frame structures exposed to seismic excitations is visible.
Marcin Szczepanski; Wojciech Migda; Robert Jankowski. Timber Frame Houses with Different Insulation Materials - Seismic Analysis. 2017 Baltic Geodetic Congress (BGC Geomatics) 2017, 389 -393.
AMA StyleMarcin Szczepanski, Wojciech Migda, Robert Jankowski. Timber Frame Houses with Different Insulation Materials - Seismic Analysis. 2017 Baltic Geodetic Congress (BGC Geomatics). 2017; ():389-393.
Chicago/Turabian StyleMarcin Szczepanski; Wojciech Migda; Robert Jankowski. 2017. "Timber Frame Houses with Different Insulation Materials - Seismic Analysis." 2017 Baltic Geodetic Congress (BGC Geomatics) , no. : 389-393.
Marcin Szczepański; Wojciech Migda; Robert Jankowski. MODAL ANALYSIS OF REAL TIMBER FRAME HOUSES WITH DIFFERENT INSULATION MATERIALS. Advances in Science and Technology Research Journal 2016, 10, 215 -221.
AMA StyleMarcin Szczepański, Wojciech Migda, Robert Jankowski. MODAL ANALYSIS OF REAL TIMBER FRAME HOUSES WITH DIFFERENT INSULATION MATERIALS. Advances in Science and Technology Research Journal. 2016; 10 (31):215-221.
Chicago/Turabian StyleMarcin Szczepański; Wojciech Migda; Robert Jankowski. 2016. "MODAL ANALYSIS OF REAL TIMBER FRAME HOUSES WITH DIFFERENT INSULATION MATERIALS." Advances in Science and Technology Research Journal 10, no. 31: 215-221.
Marcin Szczepański; Wojciech Migda; Robert Jankowski. CONSTRUCTION TECHNOLOGY OF TIMBER-FRAME HOUSES RESISTANT TO DYNAMIC LOADS – STUDY ON MODELS OF EXTERIOR WALLS. Advances in Science and Technology Research Journal 2015, 9, 75 -80.
AMA StyleMarcin Szczepański, Wojciech Migda, Robert Jankowski. CONSTRUCTION TECHNOLOGY OF TIMBER-FRAME HOUSES RESISTANT TO DYNAMIC LOADS – STUDY ON MODELS OF EXTERIOR WALLS. Advances in Science and Technology Research Journal. 2015; 9 (28):75-80.
Chicago/Turabian StyleMarcin Szczepański; Wojciech Migda; Robert Jankowski. 2015. "CONSTRUCTION TECHNOLOGY OF TIMBER-FRAME HOUSES RESISTANT TO DYNAMIC LOADS – STUDY ON MODELS OF EXTERIOR WALLS." Advances in Science and Technology Research Journal 9, no. 28: 75-80.