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Statements

Subject Item
n2:RIV%2F68407700%3A21110%2F04%3A01099171%21RIV07-GA0-21110___
rdf:type
skos:Concept n20:Vysledek
dcterms:description
A simple procedure is presented for the determination of a Periodic Unit Cell (PUC) for a masonry structure made of non-periodically distributed bricks of various sizes and shapes. Such a unit cell, in order to be statistically representative, is derived by matching geometrical statistics related to the original structure and the idealized unit cell. The required input data are obtained from digitized photographs of real historical structures. The parameters of the unit cell then follow from a minimization problem, defined in terms of properly selected statistical descriptors such as the two-point probability function. The resulting optimization problem is efficiently solved by a global optimization technique based on genetic algorithms. The quality of the periodic unit cell is judged by numerical evaluation of effective elastic properties. In this work, three alternative algorithms are considered. The first one is based on well-developed techniques of mathematical homogenization of p. A simple procedure is presented for the determination of a Periodic Unit Cell (PUC) for a masonry structure made of non-periodically distributed bricks of various sizes and shapes. Such a unit cell, in order to be statistically representative, is derived by matching geometrical statistics related to the original structure and the idealized unit cell. The required input data are obtained from digitized photographs of real historical structures. The parameters of the unit cell then follow from a minimization problem, defined in terms of properly selected statistical descriptors such as the two-point probability function. The resulting optimization problem is efficiently solved by a global optimization technique based on genetic algorithms. The quality of the periodic unit cell is judged by numerical evaluation of effective elastic properties. In this work, three alternative algorithms are considered. The first one is based on well-developed techniques of mathematical homogenization of p. Tento příspěvek porovnává tři přístupy k modelování zděných konstrukcí s nepravidelnou strukturou. První z nich je založen na definici periodické jednotkové buňky, která optimálně aproximuje původní strukturu ve smyslu dvojbodové pravděpodobnosti. Druhý využívá rozšířených Hashin-Shtrikmanových variačních principů; třetí je založen na rychlé Fourierově transformaci.
dcterms:title
Homogenizace náhodných zděných konstrukcí - porovnání numerických metod Homogenization of Random Masonry Structures - Comparison of Numerical Methods Homogenization of Random Masonry Structures - Comparison of Numerical Methods
skos:prefLabel
Homogenization of Random Masonry Structures - Comparison of Numerical Methods Homogenization of Random Masonry Structures - Comparison of Numerical Methods Homogenizace náhodných zděných konstrukcí - porovnání numerických metod
skos:notation
RIV/68407700:21110/04:01099171!RIV07-GA0-21110___
n4:strany
1 ; 8
n4:aktivita
n9:P
n4:aktivity
P(GA103/04/1321), P(GP103/01/D052), P(GP103/04/P254)
n4:dodaniDat
n11:2007
n4:domaciTvurceVysledku
n12:4695046 n12:1374249 n12:3638464
n4:druhVysledku
n15:D
n4:duvernostUdaju
n5:S
n4:entitaPredkladatele
n17:predkladatel
n4:idSjednocenehoVysledku
566637
n4:idVysledku
RIV/68407700:21110/04:01099171
n4:jazykVysledku
n14:eng
n4:klicovaSlova
Hashin-Shtrikman variational principles; Lipman-Schwinger equation; finite element method; masonry structures; mathematical homogenization; random heterogenous media; statistically optimized unit cell
n4:klicoveSlovo
n7:Hashin-Shtrikman%20variational%20principles n7:mathematical%20homogenization n7:masonry%20structures n7:statistically%20optimized%20unit%20cell n7:random%20heterogenous%20media n7:Lipman-Schwinger%20equation n7:finite%20element%20method
n4:kontrolniKodProRIV
[A5C0188378DE]
n4:mistoKonaniAkce
Newark
n4:mistoVydani
Newark
n4:nazevZdroje
EM 2004 - 17th ASCE Engineering Mechanics Division Conference
n4:obor
n10:JN
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
3
n4:projekt
n6:GA103%2F04%2F1321 n6:GP103%2F04%2FP254 n6:GP103%2F01%2FD052
n4:rokUplatneniVysledku
n11:2004
n4:tvurceVysledku
Novák, Jan Zeman, Jan Šejnoha, Michal
n4:typAkce
n19:WRD
n4:zahajeniAkce
2004-06-13+02:00
s:numberOfPages
8
n13:hasPublisher
University of Delaware
n18:organizacniJednotka
21110