Temat: support zone - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Construction disasters caused by punching in the support zone of reinforced concrete slab-and-column ceilings as well as means of their repair and reinforcement
Autorzy:: Kobielak, S.
Hutnik, E.
Zamiar, Z.
Powiązania:: https://bibliotekanauki.pl/articles/347252.pdf
Data publikacji:: 2016
Wydawca:: Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:: disaster
building structure
punching in the support zone
slab-and-column ceiling
reinforcement
Opis:: Slab-and-column ceilings are widely used because of the considerable savings that they allow to obtain in the total construction cost. However, this structural system has a weak feature that consists of vulnerability to punching in a ceiling slab around its connection to a column. This paper describes several examples of disasters caused by slab punching and gives conclusions resulting therefrom. In order to eliminate the problem of punching, in the world there are used various types of shear reinforcement in a slab around a column, which are characterized by malleability and puncture resistance, thereby preventing a disaster. Examples of such reinforcement of ceiling slabs around columns are also shown in the work.
Źródło:: Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2016, 1; 151-167
1731-8157
Pojawia się w:: Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessing coastal sustainability: a Bayesian approach for modeling and estimating a global index for measuring risk
Autorzy:: Vitabile, S.
Farruggia, A.
Pernice, G.
Gaglio, S.
Powiązania:: https://bibliotekanauki.pl/articles/307918.pdf
Data publikacji:: 2013
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Bayesian networks
decision support systems
integrated coastal zone management
Sustainable Coastal Index
Opis:: Integrated Coastal Zone Management is an emerging research area. The aim is to provide a global view of different and heterogeneous aspects interacting in a geographical area. Decision Support Systems, integrating Computational Intelligence methods, can be successfully used to estimate useful anthropic and environmental indexes. Bayesian Networks have been widely used in the environmental science domain. In this paper a Bayesian model for estimating the Sustainable Coastal Index is presented. The designed Bayesian Network consists of 17 nodes, hierarchically organized in 4 layers. The first layer is initialized with the season and the physiographic region information. In the second layer, the first-order indexes, depending on raw data, of physiographic regions are computed. The third layer estimates the second-order indexes of the analyzed physiographic regions. In the fourth layer, the global Sustainable Coastal Index is inferred. Processed data refers to 13 physiographic regions in the Province of Trapani, western Sicily, Italy. Gathered data describes the environmental information, the agricultural, fisheries, and economical behaviors of the local population and land. The Bayesian Network was trained and tested using a real dataset acquired between 2000 and 2006. The developed system presents interesting results.
Źródło:: Journal of Telecommunications and Information Technology; 2013, 4; 5-15
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Determination of the stress-strain state of rock mass and zone of inelastic deformation around underground mine excavation using modern methods of numerical modelling
Autorzy:: Ignatiev, Sergey A.
Sudarikov, Aleksandr E.
Imashev, Askar Zh.
Powiązania:: https://bibliotekanauki.pl/articles/2073903.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: rock support
rock mass
surrounding rock mass
geomechanical process
mathematical modelling
zone of inelastic deformation
podpora skalna
górotwór
górotwór otaczający
proces geomechaniczny
modelowanie matematyczne
strefa deformacji niesprężystych
Opis:: The paper reviews methods and trends of numerical modelling of geomechanical processes around underground mine excavations. The most rational method of determining the additional stresses caused by the mine excavations is chosen. Mathematical modelling was performed for excavations of various cross sections and different strength of rocks. The dimensions of the inelastic deformation zone around the mine excavations have been identified. The area of the total fracture zone around the excavation, as well as the area of the roof fracture zone are calculated. The results of the fracture zone modelling are presented both as coordinates and in a graphical form. To simplify application of the modelling results, dependency plots of the obtained parameters were created and analytical dependencies of the fracture zone parameters were identified. The SURFER and KOMPAS software packages were used as the graphic tools to visualize the modelling results.
Źródło:: Journal of Sustainable Mining; 2021, 20, 3; 220--227
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Roadway support design based on in-situ stress and its asymmetrical distributions in a coal mine
Autorzy:: Guo, Hongjun
Ji, Ming
Zhao, Weisheng
Powiązania:: https://bibliotekanauki.pl/articles/218766.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: kopalnia węgla
droga transportowa
transport kopalniany
in-situ stress
the stress in the rock surrounding roadway
the displacement in the rock surrounding roadway
the plastic zone in the rock surrounding roadway
support parameters
Opis:: Through in-situ stress measurements, stress data were obtained from an auxiliary transportation roadway in a coal mine in Shanxi Province, China. Based on the principles of elastic mechanics and using a generalized plane strain model, the mechanical effects of the in-situ stresses on an idealized roadway were calculated and the distributions of stresses, displacements, and plastic zones determined. Building on this model, the vulnerable zones in the roadway cross section were identified. Ground support specifications were developed and during specification design, comprehensive consideration was given to factors affecting the stability of the rock surrounding the roadway. A scientific and reasonable support scheme was put forward. Practical experience in the coal mine shows the normal forces of anchor bolt and cable, the minimal convergence of roof to floor, and a generally good support in the auxiliary transportation roadway. The support should ensure safe production during its service life. This study provides a new method for designing roadway support systems that can be particularly valuable for high-stress roadways.
Źródło:: Archives of Mining Sciences; 2020, 65, 2; 299-315
0860-7001
Pojawia się w:: Archives of Mining Sciences
Dostawca treści:: Biblioteka Nauki

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