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  1. 28 Materiały Budowlane
  2. 12 Assembly Techniques and Technologies
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  1. 7 Pawłowski K.
  2. 4 Sieczkowski Jan
  3. 4 Wierzbicki Stanisław M.
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  5. 3 Mucha J.
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  1. 1 2025
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1
Content available Analiza cieplno-wilgotnościowa złącza typu płyta na gruncie – mur
Ksit Barbara, Smoczyk Mateusz
Materiały Budowlane
|
2025
|
nr 1
63--64
2
Content available remote Nowa generacja łączników do realizacji sztywnych węzłów w konstrukcjach prefabrykowanych
Dudziak Sławomir
Materiały Budowlane
|
2024
|
nr 11
210--211
3
Content available remote Efektywność konstrukcyjna, trwałość i swoboda projektowania budynków z elementów prefabrykowanych
Adamczewski Grzegorz, Nicał Aleksander, Woyciechowski Piotr
Materiały Budowlane
|
2024
|
nr 5
63--65
4
Content available remote Połączenia na wkręty elementów z blach cienkich
Broniewicz Mirosław
Inżynier Budownictwa
|
2024
|
nr 9
78--82
5
Charakterystyka i opis stanu złączy elementów budynków w wybranych systemach wielkopłytowych
Nicał Aleksander
Budownictwo i Prawo
|
2024
|
R. 27, nr 4
12--17
PL
Wznoszone w Polsce w latach 1960-1980 konstrukcje budynków wielkopłytowych były oparte na systemach centralnych otwartych i zamkniętych oraz na systemach regionalnych. Specyfika technologii prefabrykacji, w tym systemów wielkopłytowych, polega m.in. na łączeniu wcześniej wyprodukowanych gotowych elementów w układ tworzący przestrzenną konstrukcję budynku. Złącza są miejscami, w których następuje połączenie prefabrykatów. Autor przedstawił charakterystyki złączy w dominujących wówczas systemach Wk-70, W-70, OWT, WUF-T i Systemie Szczecińskim. Artykuł zawiera także analizę obecnego stanu technicznego złączy na postawie źródeł literaturowych oraz badań makroskopowych autora. W artykule zawarto również wybrane aspekty diagnostyki elementów konstrukcyjnych budynków wielkopłytowych.
EN
Large-plate building structures erected in Poland between 1960 and 1980 were based on central open and closed systems and regional systems. The specificity of prefabrication technology, including large-panel systems, consists, among other things, in joining previously manufactured prefabricated elements to form a spatial building structure. Joints are the places where the prefabricated elements are connected. The author presented the characteristics of joints in Wk-70, W-70, OWT, WUF-T and Szczecin System, which were dominant at that time. The article also contains an analysis of the present technical condition of joints on the basis of literature sources and the author's macroscopic research. The article also contains selected aspects of diagnostics of structural elements of large-plate buildings.
6
Content available Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation
Jing Wei, Lu Bingpeng, Jing Laiwang, Jin Rencai
Archives of Civil Engineering
|
2024
|
Vol. 70, nr 4
615--629
EN
The mechanical properties and failure characteristics of joined rocks have an important impact on the disaster prevention of underground engineering and the sustainable development of mineral resources. The effects of confining pressure, joint location, and joint thickness on the mechanical properties of rock-like specimens under triaxial test have been studied. Furthermore, using the "DFN-age" function of PFC numerical simulation, the stress characteristics, and failure characteristics of rock specimens under different confining pressure, joint location and joint thickness are analyzed. The research results indicate that as the thickness of the joint increases and the joint position approaches the center of the specimen, the compressive strength of the specimen decreases. As the confining pressure increases, the compressive strength increases and failure modes of rock like specimens with different joint types also tend to be similar. The specimens manifest complex shear-tensile composite failures. In addition, the initiation cracks and main control cracks at the joint terminus can be classified as reverse tensile wing cracks, reverse shear cracks, shear cracks and tensile wing cracks. When the joint thickness of the specimen is 1.0 mm and the distance from the joint position to the center of the specimen is 10-20 mm, the crack evolution characteristics and stress distribution law of the specimen will undergo a transformation.
7
Jeziora i stawy w przestrzeni miast
Słomka Wojciech
Zieleń Miejska
|
2023
|
Nr 5
44--45
PL
W wielu polskich miastach jeziora i stawy (naturalne bądź sztuczne) od wielu lat podnoszą jakość krajobrazu aglomeracji, służą celom rekreacyjnym oraz stanowią siedlisko życia licznych gatunków flory i fauny. Stają się bardzo cenne zarówno przyrodniczo, jak i społecznie ze względu na stale zmieniające się warunki klimatyczne i brak stabilności pogodowej.
8
Content available remote Wybrane aspekty techniczne elementów łącznikowych w nowoczesnej prefabrykacji
Koton Andrzej, Adamczewski Grzegorz, Woyciechowski Piotr
Materiały Budowlane
|
2023
|
nr 5
55--56
9
Content available remote Połączenia w prefabrykowanych drewnianych budynkach szkieletowych
Roszczyc Rafał, Szczesiak Tomasz
Materiały Budowlane
|
2023
|
nr 3
61--63
10
Content available Analysis of the effect of surface pre-treatment on selected properties of the glass-metal bonded joint
Kuśmierczak Sylvia, Zelinka Matěj, Kruzel Robert, Dembiczak Tomasz
Budownictwo o Zoptymalizowanym Potencjale Energetycznym
|
2023
|
Vol. 12
124-131
EN
Due to its properties, glass is a material that is increasingly used in technical practices including construction and architecture. Products that combine both glass and metal are often used in the construction industry. Nowadays, modern methods of joining these materials are being sought, which include gluing. Bonding is a multi-step process that is affected by both internal and external factors. The resulting quality of the joint, which can be evaluated by destructive and non-destructive tests, is important for the application of a glued joint that is exposed to external stress. The presented article deals with the analysis of the effect of pre-treatment on selected properties of the bonded glass-metal pair using selected methods of destructive testing.
11
Content available Robotic Transport ARM
Filipek Przemysław
Journal of Technology and Exploitation in Mechanical Engineering
|
2022
|
Vol. 8, nr 1
42--49
EN
This paper presents the design assumptions, 3D model, electronics, control and actual implementation of a programmable model of an industrial robotic arm used to transport parts with small masses. The arm communicates via Wi-Fi, has a user interface, keyboard and alphanumeric display. The necessary calculations were made for the torques of the arm's drives used, and its mechanical design and electronics schematic are presented. Tests to verify the operation of the arm were carried out.
12
Content available Damage mechanism of conventional joints and proposal of a novel joint for hollow-core slab bridges
Cui Yujun, Xue Xingwei, Yao Hao, Hua Xudong, Huang Yuanming
Archives of Civil Engineering
|
2022
|
Vol. 68, nr 4
571--590
EN
The prefabricated hollow-core slab bridge is a common bridge. In prefabricated hollow-core slab bridges, joints play an important role in connecting prefabricated slabs and ensuring the integrity of the bridge. However, as the service time of the bridge increases, conventional joints have a large number of typical diseases that affect the safety and durability of bridges. In this study, a three-dimensional finite element model of the entire construction phase is established to investigate the development difference of shrinkage and creep between joints and hollow-core slabs. The effects of vehicle load and temperature gradient on joints were analysed, the failure mechanism of joints was explored, and a novel joint was proposed. The results of a nonlinear analysis showed that the novel joint can effectively improve the mechanical performance of joints and cracks can be effectively controlled. Moreover, the novel joint solves the problem in that the conventional novel joint cannot be vibrated effectively.
13
Content available remote Izolacyjność akustyczna okien
Reinsch Karol
Materiały Budowlane
|
2021
|
nr 8
18--20
14
Węzły ram portalowych z kształtowników profilowanych na zimno
Jastrzębski Kamil, Budziński Rafał, Ślęczka Lucjan
Inżynieria i Budownictwo
|
2021
|
R. 77, nr 11-12
524--527
PL
Przedstawiono ogólną charakterystykę łączenia stalowych elementów cienkościennych oraz rozwiązania węzłów ram portalowych z kształtowników profilowanych. Omówiono czynniki wpływające na ich właściwości strukturalne oraz wskazano różnice w podejściu obliczeniowym względem węzłów doczołowych stosowanych w konstrukcjach z kształtowników walcowanych.
EN
General characteristics of joining thin-walled steel members were described and typical examples of joints in portal frames composed of cold-formed sections were presented. Factors influencing their structural properties were discussed and differences in the analytical approach comparing to endplate connections used for joining hot-rolled sections were mentioned.
15
Content available remote Microstructural and mechanical properties of CFC composite/Ti6Al4V joints brazed with Ag–Cu–Ti and refractory metal foils
Kang Yuhang, Feng Kaimin, Zhang Weitang, Mao Yangwu
Archives of Civil and Mechanical Engineering
|
2021
|
Vol. 21, no. 3
487--496
EN
Carbon fiber-reinforced carbon composite (CFC)/Ti6Al4V alloy brazing has been performed with Ag–Cu–Ti braze and Nb (or W) foil. Satisfactory bonding is achieved at the interfaces among substrates, refractory metal layer and fillers. The joining region consists of filler I, refractory metal layer and filler II. The fillers I and II are composed of Ag-based solid solution, TiCu and Cu-based solid solution. A diffusion layer (comprising Ti-based solid solution and Ti2Cu) and a thin TiC reaction layer develop adjacent to Ti6Al4V and CFC substrates, respectively. Regarding the joining with Nb foil, slight dissolution and diffusion occur between Nb and Ti in the fillers upon brazing. However, neither inter-diffusions nor reactions between W and fillers are involved in CFC/Ti6Al4V joining with W foil. The average shear strengths of joints with Nb and W foils are about 200% higher than those without refractory metal foil, indicating that the thermal mismatch in the joint can be relieved by the introduced refractory metal foils with appropriate coefficients of thermal expansion. Moreover, Nb foil with high ductility is beneficial for the inhibition of both the micro-crack propagation and the brittle-phase formation in the joint. W foil can act as a hard barrier to adjust the joint stress distribution and to decrease the joint stress concentration.
16
Content available remote Zabezpieczenia przejść instalacyjnych i złączy
Gacki Dawid
Materiały Budowlane
|
2020
|
nr 7
16--18
17
Content available remote Błędy wykonawcze i projektowe izolacji wodochronnych na przykładzie dachu centrum handlowego
Gotowicka Marta, Klatt Ryszard
Materiały Budowlane
|
2020
|
nr 3
13--15
18
Kwalifikowanie operatorów na podstawie walidacji technologii zgrzewania trzpieni metalowych wg norm europejskich
Adamski Paweł, Ufland Kamil, Jastrzębski Ryszard
Dozór Techniczny
|
2020
|
z. 6
2--13
PL
Dyrektywy europejskie wymagają od firm spawalniczych stosujących procesy spajania uprawnień do wytwarzania konstrukcji. Normy wytwarzania wprowadzają obowiązek walidacji procesu, czyli sprawdzenia jego przydatności do konkretnego zastosowania w warunkach produkcji. Z kolei zleceniodawcy, coraz częściej żądają walidacji kierunkowych technologii do realizacji określonej inwestycji. Aby zakład mógł stosować spajanie w produkcji, musi udowodnić, że posiada odpowiednie możliwości techniczne i zaplecze personalne do wykonania konstrukcji o wymaganej jakości. W przypadku zgrzewania trzpieni metalowych walidację procesu należy przeprowadzić na podstawie zapisów normy PN-EN ISO 14555:2017. Określa ona wymagania dotyczące projektowania, kwalifikowania, badania technologii i badania produkcyjnego złączy.
19
Content available remote Nonlinear shear constitutive model for peak shear-type joints based on improved Harris damage function
Xie Shijie, Lin Hang, Wang Yixian, Cao Rihong, Yong Rui, Du Shigui, Li Jiangteng
Archives of Civil and Mechanical Engineering
|
2020
|
Vol. 20, no. 3
454--467
EN
The majority of jointed rock mass failures mainly occur along the joints in shear mode, which promotes a wide investigation on the proposal of a reasonable and reliable shear constitutive model of rock joints. In this paper, based on Improved Harris function and laboratory shear tests, a new constitutive model of saw-tooth joints was proposed. Firstly, a series of laboratory direct shear tests were carried out on saw-tooth joint specimens made of rock-like materials (cement mortar) to obtain the shear stress-displacement curves. Subsequently, the test results were divided into sliding failure type and peak shear type according to whether there is a significant stress drop between peak stress and residual stress. It is assumed that rock elements can be divided into undamaged parts and damaged parts during the shearing process. The stress-displacement relation of the undamaged part satisfies Hooke’s law, while the damaged part provides residual stress. Via the comparison with commonly used micro-element failure probability density functions, the Improved Harris distribution function was selected as the standard to characterize the strength of micro rock units. Finally, derived from the theory of damage statistical mechanics, a damage statistical constitutive model was proposed, which can reflect the deformation characteristics of rock joints. Compared with previous models and experimental data, the model proposed in this paper can represent the trend of peak shear curve variation with higher accuracy, the parameters are easy to be solved and have obvious physical significance, which verifies the advantages and applicability of this model.
20
Content available remote Mechanical behavior around double circular openings in a jointed rock mass under uniaxial compression
Lin Qibin, Cao Ping, Cao Rihong, Lin Hang, Meng Jingjing
Archives of Civil and Mechanical Engineering
|
2020
|
Vol. 20, no. 1
264--281
EN
To better understand the mechanical behavior in a jointed rock mass, a series of uniaxial compression tests were conducted on non-persistently jointed rock specimens with double circular holes. Acoustic emission (AE) and digital image correlation (DIC) techniques were applied to capture micro-crack events and real-time strain field evolution in the specimens. The results indicate that the existence of non-persistent joints has a significant influence on the strength characteristics of the specimens. Specifically, peak strength decreases at first and reaches a minimum at 30° then increases with increase in the joint dip angle. DIC technology has successfully monitored the development of surface strain fields. The fracture evolution process is comprehensively understood. Every sudden change in a strain field is usually accompanied by apparent AE events and stress–strain curves take the form of oscillations. The crack coalescence modes among joints can be summarized as six types and the crack coalescence patterns around holes and joints can be divided into three categories. These results are helpful to understanding further the mechanical properties and fracture mechanism of openings in non-persistently jointed rock masses.
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