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The article investigated the possibility of reusing heat resistant glass cullet to improve the mechanical properties of high-temperature composites. This is an excellent recycled aggregate that may be used as a substitute for alumina cement, and for fine natural aggregate in the production of concrete based on hydraulic binder. The experimental programme comprised of strength testing conducted on 40 × 40 × 160 mm cuboidal samples. The model mixture was modified by filler that comprised glass recyclate, amounting to 5%, 10%, and 15% of the mass of gravel and cement. Given the degree of glass grounding, use was made of two fractions, 0/4 and 0/0.125 mm. Six modified mixtures were produced. Tests were then carried out on their selected physical and mechanical properties as well as the impact of temperature, topography, and chemical composition exerted on the composite. Next, the progress and development of compressive strength and flexural strength after 14 and 28 days of curing were studied. Results showed that concrete with a 5% content of glass dust had a maximum compressive strength at the level of 85.1 MPa. Results also showed that concrete (Zk.I.5) heated at a temperature of 500 °C had a 46% higher compressive strength when compared to basic concrete (Z.I.0). The results show that it is possible to use the described components to obtain a composite that meets requirements imposed on structural materials used in construction engineering.
Aleksandra Powęzka; Paweł Ogrodnik; Jacek Szulej; Mariusz Pecio. Glass Cullet as Additive to New Sustainable Composites Based on Alumina Binder. Energies 2021, 14, 3423 .
AMA StyleAleksandra Powęzka, Paweł Ogrodnik, Jacek Szulej, Mariusz Pecio. Glass Cullet as Additive to New Sustainable Composites Based on Alumina Binder. Energies. 2021; 14 (12):3423.
Chicago/Turabian StyleAleksandra Powęzka; Paweł Ogrodnik; Jacek Szulej; Mariusz Pecio. 2021. "Glass Cullet as Additive to New Sustainable Composites Based on Alumina Binder." Energies 14, no. 12: 3423.
The article describes the possibility of using waste glass cullet as an alternative aggregate for the production of cement composites. Three concrete mixes based on Portland cement CEM I 42.5 R with different contents of recyclate were designed. Borosilicate glass cullet was introduced into the batch by reducing the content of natural aggregate by 0%, 2.5% and 7.5%. Apparent density, water absorption and compressive strength at elevated temperature were measured. The temperature distribution, in cubic samples, was followed by thermocouples. The elements were heated in a special furnace at the temperatures of 200 °C, 400 °C, 600 °C and 800 °C. The composite topography and phase composition were observed using X-ray energy scattering electron microscopy. The results show that the appropriate modification of the cement composite with 2.5% heat-resistant glass cullet improves both the thermal and mechanical properties. Compressive strength reaches an average value of 48.6 MPa after 28 days. The increase in temperature weakens the structure of the composite. It was found that the obtained cement composite has good physico–chemical properties. The research results are presented in the article.
Aleksandra Powęzka; Jacek Szulej; Paweł Ogrodnik. Reuse of Heat Resistant Glass Cullet in Cement Composites Subjected to Thermal Load. Materials 2020, 13, 4434 .
AMA StyleAleksandra Powęzka, Jacek Szulej, Paweł Ogrodnik. Reuse of Heat Resistant Glass Cullet in Cement Composites Subjected to Thermal Load. Materials. 2020; 13 (19):4434.
Chicago/Turabian StyleAleksandra Powęzka; Jacek Szulej; Paweł Ogrodnik. 2020. "Reuse of Heat Resistant Glass Cullet in Cement Composites Subjected to Thermal Load." Materials 13, no. 19: 4434.
During processing and transport, the ceramic industry generates big amounts of waste. In order to limit the number of landfills and to minimise consequences of such waste that is clearly noxious for the environment, this industry remains under great pressure to find effective recycling methods for its waste and by-products. What is more, given the limited resources of traditional aggregate, energy savings and protection of the environment, the construction industry is seeking for new sources of aggregate. For this reason, ceramic waste is increasingly frequently used as coarse and fine aggregate, both in mortars and in concrete mixtures. The goal of studies presented in the paper was to analyse the impact of recycled ceramic aggregate on the frost and salt spray resistance of stucco mortar used in the construction industry. Mortar recipes also contained admixtures that modify properties of the mixture and of the hardened product, such as copolymer of vinyl acetate and methylcellulose with a hydrophobic admixture. Elementary testing was performed related to mechanical and physical parameters of mortars. Among others tests were carried out of compressive strength and flexural strength, a determination was made of density, open and total porosity, absorbability, resistance to salt spray corrosion and frost resistance after 25 freeze–thaw cycles of samples. Replacement of sand by recycled ceramic aggregate causes a change in physical parameters of mortars. It has a positive impact on strength parameters of mortars with concurrent reduction in absorbability and capillary action. Testing of mortar with the addition of ceramic aggregate has proved better frost resistance and resistance to salt crystallisation as compared to mortar to which sand had been added. Graphic abstract
Beata Klimek; Jacek Szulej; Paweł Ogrodnik. The effect of replacing sand with aggregate from sanitary ceramic waste on the durability of stucco mortars. Clean Technologies and Environmental Policy 2020, 22, 1929 -1941.
AMA StyleBeata Klimek, Jacek Szulej, Paweł Ogrodnik. The effect of replacing sand with aggregate from sanitary ceramic waste on the durability of stucco mortars. Clean Technologies and Environmental Policy. 2020; 22 (9):1929-1941.
Chicago/Turabian StyleBeata Klimek; Jacek Szulej; Paweł Ogrodnik. 2020. "The effect of replacing sand with aggregate from sanitary ceramic waste on the durability of stucco mortars." Clean Technologies and Environmental Policy 22, no. 9: 1929-1941.
The article presents results obtained during testing of concrete based on CEM I 42.5R Portland cement, fine and coarse aggregate, glass, volatile ash, and superplastifier. The concrete mixture was modified using filler consisting of bromosilicate heat resistant cullet. Recycled aggregate was added to the batch. Samples for the need of testing were produced as (100 × 100 × 100) mm cubes. Before commencing proper tests, samples have been heated within the temperature range of 20–800 °C. Tests carried out during the proper testing procedure included tests of compressive strength, elevated temperature, impact strength, as well as macroscopic tests of the contact area. The obtained test results have provided proof of there being a possibility of producing special concrete, modified by products obtained from heat resistant cullet. This type of is generally characterized by satisfactory performance parameters. The average compressive strength for concrete modified by a 10% of heat resistant cullet was determined as 43.6 MPa and 48.3 MPa respectively after 28 and 180 days of curing.
Aleksandra Powęzka; Jacek Szulej; Paweł Ogrodnik. Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet. Materials 2020, 13, 465 .
AMA StyleAleksandra Powęzka, Jacek Szulej, Paweł Ogrodnik. Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet. Materials. 2020; 13 (2):465.
Chicago/Turabian StyleAleksandra Powęzka; Jacek Szulej; Paweł Ogrodnik. 2020. "Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet." Materials 13, no. 2: 465.
The article presents the results of research on the use of ceramic ware waste as aggregate in concrete production. Four concrete mixtures with aluminous cement were prepared, each with a different admixture of clinoptilolite. The only used aggregate was crushed waste ceramic sanitary ware obtained from a Polish sanitary fixture production plant. As part of the studies, a compressive test of cubic samples at different curing times ranging from 7 to 90 days was performed. Prior to the preparation of the samples, a sieve analysis and an elemental analysis of the obtained aggregate were conducted. In the framework of the testing, the bimodal distribution of clinoptilolite grains was determined, as well as its chemical composition. The conducted compressive tests demonstrated high strength of concrete containing ceramic aggregate and aluminous cement with an addition of clinoptilolite. In order to determine the impact that adding zeolite exerts on the phase composition and the structure of concrete samples, an analysis of the phase composition (XRD) and scanning electron microscopy examination (SEM) were performed. Furthermore, tests of abrasion, water penetration under pressure and frost resistance were conducted, determining particular properties of the designed mixtures. The abrasion tests have confirmed that the mixtures are highly abrasion-resistant and can be used as a topcoat concrete layer. The conducted tests of selected properties have confirmed the possibility of using waste ceramic cullet and a mineral addition of clinoptilolite in concrete production.
Jacek Szulej; Paweł Ogrodnik; Beata Klimek. Zeolite Tuff and Recycled Ceramic Sanitary Ware Aggregate in Production of Concrete. Sustainability 2019, 11, 1782 .
AMA StyleJacek Szulej, Paweł Ogrodnik, Beata Klimek. Zeolite Tuff and Recycled Ceramic Sanitary Ware Aggregate in Production of Concrete. Sustainability. 2019; 11 (6):1782.
Chicago/Turabian StyleJacek Szulej; Paweł Ogrodnik; Beata Klimek. 2019. "Zeolite Tuff and Recycled Ceramic Sanitary Ware Aggregate in Production of Concrete." Sustainability 11, no. 6: 1782.
The article presents the results of bond tests of B500SP structural steel to concretes subjected to thermal stress. Concretes were designed purely on the basis on waste aggregate made of soft clay pottery with using two types of cements: Portland CEM 32.5R and aluminous cement Górkal 70. In the research was used the method of direct pulling the steel rod out of the concrete cover (Pullout Test). For the tests were prepared four types of concretes: two bases of aluminous cement and two on Portland cement without additions. In the remaining mixtures containing the additive in the form of clinoptilolite, the method of simple weight replacement of the selected type of cement with clinoptilolite in the amount of 10% was used. Mineral puzzolana additives are intended to modify the phase composition of hardened cement slurry towards reducing the portlandite and changing the CaO/SiO2 ratio in the C-S-H phase. The results of the tests confirmed that the bond of the selected steel type to concrete on the recycle aggregate does not differ from the results achieved with natural aggregate. It was also confirmed that addition of clinoptilolite to concrete with Portland cement has beneficial effect when it is subjected to thermal stress.
Paweł Ogrodnik; Jacek Szulej. Structural steel bond to concrete with waste aggregate. SHS Web of Conferences 2018, 57, 02007 .
AMA StylePaweł Ogrodnik, Jacek Szulej. Structural steel bond to concrete with waste aggregate. SHS Web of Conferences. 2018; 57 ():02007.
Chicago/Turabian StylePaweł Ogrodnik; Jacek Szulej. 2018. "Structural steel bond to concrete with waste aggregate." SHS Web of Conferences 57, no. : 02007.
In the paper it was decided to recognize the material characteristics of concrete based on ceramic aggregate, aluminous cement with the addition of zeolite (5%, 10%, 15%) and air entraining admixture. Aggregate crushed to 2 fractions was used for designing the concrete mix : 0-4 mm, and 4-8 mm. The research involved the use of clinoptilolite derived from the zeolite tuff deposit at Sokyrnytsya (Transcarpathia, Ukraine). The dominant component in the zeolite is clinoptilolite in an amount of about 75%. The research carried out by the authors showed that the addition of zeolite, among others, increases the compressive strength of concrete, significantly improves the frost resistance, which in the case of using only aluminous cement is very low. The obtained results confirm the possibility of using the above-mentioned components, which improve the concrete material properties and are environmentally friendly.
Jacek Szulej; Paweł Ogrodnik. The effect of zeolite addition on parameters of concrete containing recycled ceramic aggregate. E3S Web of Conferences 2018, 45, 00116 .
AMA StyleJacek Szulej, Paweł Ogrodnik. The effect of zeolite addition on parameters of concrete containing recycled ceramic aggregate. E3S Web of Conferences. 2018; 45 ():00116.
Chicago/Turabian StyleJacek Szulej; Paweł Ogrodnik. 2018. "The effect of zeolite addition on parameters of concrete containing recycled ceramic aggregate." E3S Web of Conferences 45, no. : 00116.
This article presents the results of research on the wastes of sanitary ceramics as an aggregate to concretes. The case of high temperature load was taken into account. Six concrete mixes were designed on Portland and calcium aluminate cement with various content of aerating admixture. Only the ground waste ceramics were used as an aggregate from one of the Polish sanitary ceramics plants. The abrasion test by Boehme blade of the designed concrete was conducted within the frame of study and compression strength tests on the cylindrical samples were performed as well. Some samples were initially annealed at 400 or 800 °C prior to strength tests. In order to determine the impact of annealing on the phase content and the concrete sample structure, the analyses on phase content (XRD—X-ray diffraction) and scanning electron microscopy (SEM) were conducted. The tests on compression strength demonstrated that there is considerable resistance of concrete containing ceramic aggregate and calcium aluminate cement to high temperatures. Abrasion tests confirmed that selected mixes have a high resistance to abrasion and they can be applied as a concrete coating. The possibility of ceramic cullet use as an aggregate to special concretes has been confirmed by the conducted research on specific features. Taking into consideration the available literature, the article presents widely conducted research in the area of the internal structure of concrete designed on the basis of recycled ceramic aggregate, the phase content of individual components, and basic mechanical tests both in normal temperatures and under thermal stress.
Paweł Ogrodnik; Jacek Szulej; Wojciech Franus. The Wastes of Sanitary Ceramics as Recycling Aggregate to Special Concretes. Materials 2018, 11, 1275 .
AMA StylePaweł Ogrodnik, Jacek Szulej, Wojciech Franus. The Wastes of Sanitary Ceramics as Recycling Aggregate to Special Concretes. Materials. 2018; 11 (8):1275.
Chicago/Turabian StylePaweł Ogrodnik; Jacek Szulej; Wojciech Franus. 2018. "The Wastes of Sanitary Ceramics as Recycling Aggregate to Special Concretes." Materials 11, no. 8: 1275.
This article presents the possibilities of using soft clay pottery waste as concrete aggregate. There is shown a new approach of complete exchange natural aggregate in concrete with recycled aggregate, i.e., crushed ceramic of two fractions 0–4 and 4–8 mm. Basic characteristics of aggregate were evaluated, i.e., phase composition and crush strength. Drawing on past experiences, two concrete mixes were designed that were based on Portland cement 32.5 R used for ordinary concrete and aluminous Górkal 70, which is characterized by high initial strength and the fact that Al2O3 is the binding factor. The prepared concrete samples were subjected to maintenance for the next 28 days, and then tests started. A series of tests were performed on the properties of concrete obtained, including a compressive strength and bending strength, an abrasion resistance, frost resistance, water absorption, depth of penetration of water under pressure, and bulk density of concrete. The research confirmed assumptions that it is possible to completely replace the natural aggregate with aggregate made of soft clay pottery waste. Both designed concretes showed high compressive and bending strength, as well as low absorbability and abrasiveness. It was also found that soaking in water, as well as its duration, adversely affects the strength properties of the designed concretes. Regarding concrete based on Portland cement, it was also demonstrated that the concrete has a high frost resistance and resistance to penetration of water under pressure.
Paweł Ogrodnik; Jacek Szulej. The Assessment of Possibility of Using Sanitary Ceramic Waste as Concrete Aggregate—Determination of the Basic Material Characteristics. Applied Sciences 2018, 8, 1205 .
AMA StylePaweł Ogrodnik, Jacek Szulej. The Assessment of Possibility of Using Sanitary Ceramic Waste as Concrete Aggregate—Determination of the Basic Material Characteristics. Applied Sciences. 2018; 8 (7):1205.
Chicago/Turabian StylePaweł Ogrodnik; Jacek Szulej. 2018. "The Assessment of Possibility of Using Sanitary Ceramic Waste as Concrete Aggregate—Determination of the Basic Material Characteristics." Applied Sciences 8, no. 7: 1205.
Paweł Ogrodnik; Jacek Szulej. The impact of aeration of concrete based on ceramic aggregate, exposed to high temperatures, on its strength parameters. Construction and Building Materials 2017, 157, 909 -916.
AMA StylePaweł Ogrodnik, Jacek Szulej. The impact of aeration of concrete based on ceramic aggregate, exposed to high temperatures, on its strength parameters. Construction and Building Materials. 2017; 157 ():909-916.
Chicago/Turabian StylePaweł Ogrodnik; Jacek Szulej. 2017. "The impact of aeration of concrete based on ceramic aggregate, exposed to high temperatures, on its strength parameters." Construction and Building Materials 157, no. : 909-916.
Celem artykułu jest przedstawienie wyników badań parametrów tłumienia drgań oraz cech materiałowych konstrukcji żelbetowych z dodatkiem tufów zeolitowych i plastyfikatora. Część pierwsza artykułu opisuje właściwości zeolitów oraz wpływ jego dodatku na parametry betonu. Część główna artykułu przedstawia wyniki badań parametrów tłumienia drgań żelbetowych modeli płytowych. Modele posiadają zmodyfikowane spoiwo, w którym część cementu zastąpiono zeolitem. Wartości współczynników tłumienia drgań określano metodą kolokacyjną i uwzględniano tylko pierwszą częstość drgań własnych modeli. Zestawiono również wartości charakterystyk materiałowych zmodyfikowanego betonu takie jak moduły Younga i wartości współczynników Poissona.
Jacek Szulej. Badania parametrów dynamicznych i materiałowych elementów żelbetowych z dodatkiem zeolitu i plastyfikatora. Budownictwo i Architektura 2016, 15, 109 -116.
AMA StyleJacek Szulej. Badania parametrów dynamicznych i materiałowych elementów żelbetowych z dodatkiem zeolitu i plastyfikatora. Budownictwo i Architektura. 2016; 15 (4):109-116.
Chicago/Turabian StyleJacek Szulej. 2016. "Badania parametrów dynamicznych i materiałowych elementów żelbetowych z dodatkiem zeolitu i plastyfikatora." Budownictwo i Architektura 15, no. 4: 109-116.
While designing slim and slender structures such as cable-stayed, suspended and arch bridges and footbridges, data on the dynamic behavior of structure are required. One of the main quantities, included in the calculations, is the damping parameter of vibration of the structure whose corresponding value has a direct impact on the proper behavior of the facility. One of currently applied approaches in the case of complex constructions, is the use of methods defining the equivalent damping coefficient which refers to the given form of natural vibrations. Among these methods, the collocation method and energy method can be distinguished. The collocation method refers to the existing facilities and requires performing measurements of vibration and spectral processing of time course of vibrations. The energy method requires the creation of FEM model of construction and it estimates the kinetic energy of the vibrating system. The above- mentioned methods are used in the calculations of the damping level of vibration of two structures, i.e.: arch John Paul II Bridge in Pulawy and a footbridge located in Lublin.
Jacek Szulej; Paweł Ogrodnik. Determining the level of damping vibration in bridges and footbridges. Budownictwo i Architektura 2016, 15, 095 -103.
AMA StyleJacek Szulej, Paweł Ogrodnik. Determining the level of damping vibration in bridges and footbridges. Budownictwo i Architektura. 2016; 15 (1):095-103.
Chicago/Turabian StyleJacek Szulej; Paweł Ogrodnik. 2016. "Determining the level of damping vibration in bridges and footbridges." Budownictwo i Architektura 15, no. 1: 095-103.
The purpose of this article is to present the results of the first stage of research on the damping parameters of vibration and the material characteristics of reinforced concrete structures with the addition of zeolite tuffs. The first part of the article describes the properties of zeolites as well as its impact on the concrete parameters. The main part of the article shows the partial results of research on damping parameters of vibration of reinforced concrete slab models. The models contain modified binder in which the portion of cement was replaced by zeolite (tested models and samples contained 0%, 10%, 20%, 30%, 40% of zeolite). The values of damping coefficients of vibration were determined by the collocation method, and only the first frequency of free vibration of models was taken into account. Moreover, the material characteristics of modified concrete were determined, ie compressive strength (after 3, 7, 14, 28, 56, and 90 days), frost resistance, water absorption, friability, as well as the values of Young modulus.
Jacek Szulej; Michał Pieńko; Wojciech Franus. Preliminary studies of the dynamic and material parameters of reinforced concrete elements with the addition of zeolite tuffs. Budownictwo i Architektura 2014, 13, 317 -324.
AMA StyleJacek Szulej, Michał Pieńko, Wojciech Franus. Preliminary studies of the dynamic and material parameters of reinforced concrete elements with the addition of zeolite tuffs. Budownictwo i Architektura. 2014; 13 (2):317-324.
Chicago/Turabian StyleJacek Szulej; Michał Pieńko; Wojciech Franus. 2014. "Preliminary studies of the dynamic and material parameters of reinforced concrete elements with the addition of zeolite tuffs." Budownictwo i Architektura 13, no. 2: 317-324.
The article aims at presenting the initial results of damping parameters of vibrations in constructions with zeolite. The initial part of the article describes the properties and application of zeolite. The influence of zeolite on concrete parameters was examined. The main part of the article displays the results of the analysis of damping parameters of vibration of three plate-beam models. The models contain modified binder in which the part of cement was replaced by zeolite (containing more than 85% of crinoptylolite). The analyses were based on the induction of vibration of models, the measurements of vibrations, the spectrum treatment of time course as well as the determination of values of damping coefficients of vibration. Hence the collation method was used. Moreover, the damping coefficients of the first three modes of free vibrations of models were determined.
Jacek Szulej. The initial research of dynamic parameters for composite structures containing Zeolite. Budownictwo i Architektura 2013, 12, 283 -290.
AMA StyleJacek Szulej. The initial research of dynamic parameters for composite structures containing Zeolite. Budownictwo i Architektura. 2013; 12 (1):283-290.
Chicago/Turabian StyleJacek Szulej. 2013. "The initial research of dynamic parameters for composite structures containing Zeolite." Budownictwo i Architektura 12, no. 1: 283-290.
The results of measurements of 2-D flow around rectangular prisms of square and rectangle cross-sections in wind tunnel are presented in this paper. The results include pressure and standard deviation distributions over the model walls, components of velocity vectors and statistical moments for fluctuations of the velocity in the wind tunnel measuring space. The arrangements of models and the range of measurements have been matched in order to the results could be used to the calibration of the numerical turbulence model and to the verification of computer calculations for the civil engineering problems. The values of parameters have been presented in graphs and subsequently used in a comparative analysis of the flows around both models.
Ewa Błazik-Borowa; Jarosław Bęc; Tomasz Nowicki; Tomasz Lipecki; Jacek Szulej; P. Matys. Measurements of flow parameters for 2-D flow around rectangular prisms of square and rectangle cross-sections located on the ground. Archives of Civil and Mechanical Engineering 2011, 11, 533 -551.
AMA StyleEwa Błazik-Borowa, Jarosław Bęc, Tomasz Nowicki, Tomasz Lipecki, Jacek Szulej, P. Matys. Measurements of flow parameters for 2-D flow around rectangular prisms of square and rectangle cross-sections located on the ground. Archives of Civil and Mechanical Engineering. 2011; 11 (3):533-551.
Chicago/Turabian StyleEwa Błazik-Borowa; Jarosław Bęc; Tomasz Nowicki; Tomasz Lipecki; Jacek Szulej; P. Matys. 2011. "Measurements of flow parameters for 2-D flow around rectangular prisms of square and rectangle cross-sections located on the ground." Archives of Civil and Mechanical Engineering 11, no. 3: 533-551.
The purpose of this paper is to present methods of determining damping coefficient of vibration. The methods, such as: collocation method, two energetic methods and half-power bandwidth method, concern composite structures. Verification of methods was taken into account in this research. Real compound models and numerical models were created. Time histories of vibrations of these models were measured or calculated. Comparison of methods were made on a basis of obtained results.
Jacek Szulej. The method of determining damping coefficients of vibration for complex structures. Budownictwo i Architektura 2009, 5, 039 -059.
AMA StyleJacek Szulej. The method of determining damping coefficients of vibration for complex structures. Budownictwo i Architektura. 2009; 5 (2):039-059.
Chicago/Turabian StyleJacek Szulej. 2009. "The method of determining damping coefficients of vibration for complex structures." Budownictwo i Architektura 5, no. 2: 039-059.
Measurements of 2-D flows around a square and a rectangle (ratio 2:1) in wind tunnel have been presented in this paper. The results of these measurements presented here are pressure and standard deviation distributions on the models’ walls, components of velocity vectors and statistical moments for fluctuations of velocity in the wind tunnel measuring space. The values of parameters have been presented in graphs and subsequently used in a comparative analysis of the flows around both models.
Ewa Błazik-Borowa; Jarosław Bęc; Tomasz Nowicki; Tomasz Lipecki; Jacek Szulej. Measurements of 2-D flow parameters around rectangular prisms arranged at the ground. Budownictwo i Architektura 2008, 3, 033 -051.
AMA StyleEwa Błazik-Borowa, Jarosław Bęc, Tomasz Nowicki, Tomasz Lipecki, Jacek Szulej. Measurements of 2-D flow parameters around rectangular prisms arranged at the ground. Budownictwo i Architektura. 2008; 3 (2):033-051.
Chicago/Turabian StyleEwa Błazik-Borowa; Jarosław Bęc; Tomasz Nowicki; Tomasz Lipecki; Jacek Szulej. 2008. "Measurements of 2-D flow parameters around rectangular prisms arranged at the ground." Budownictwo i Architektura 3, no. 2: 033-051.
The purpose of this paper is to present methods of vibrations damping coefficient determination. The methods, such as collocation method, two energetic methods and half-power bandwidth method concern composite structures. The verification of methods has been taken into account in this work. Two real compound models and two numerical models have been created. Time series of vibrations of these models have been measured and calculated. The comparison of four methods has been made on the basis of obtained results.
Andrzej Flaga; Jacek Szulej; Piotr Wielgos. Comparison of determination methods of vibration’s damping coefficients for complex structures. Budownictwo i Architektura 2008, 3, 053 -061.
AMA StyleAndrzej Flaga, Jacek Szulej, Piotr Wielgos. Comparison of determination methods of vibration’s damping coefficients for complex structures. Budownictwo i Architektura. 2008; 3 (2):053-061.
Chicago/Turabian StyleAndrzej Flaga; Jacek Szulej; Piotr Wielgos. 2008. "Comparison of determination methods of vibration’s damping coefficients for complex structures." Budownictwo i Architektura 3, no. 2: 053-061.