Navrhovanie nosných konštrukcií stavieb, Betónové konštrukcie

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Author(s): Ľudovít Fillo, Juraj Bilčík, Jaroslav Halvoník
Series: Betónové konštrukcie
Edition: 1
Year: 2009

Language: Slovak
Pages: 138
City: Bratislava

Obsah
1 Úvod (Fillo) .................................................................................................................................... 4
1.1 Betón ..............................................................................................................................4
1.2 Normy pre navrhovanie..................................................................................................4
2 Navrhovanie (Halvoník)..................................................................................................................7
2.1 Základné požiadavky......................................................................................................7
2.2 Princípy navrhovania podľa medzných stavov.............................................................. 8
2.3 Základné premenné veličiny ......................................................................................... 9
2.4 Parciálne súčinitele spoľahlivosti .................................................................................12
3 Materiály (Bilčík).......................................................................................................................... 18
3.1 Rozdelenie stavebných materiálov ..............................................................................18
3.2 Pevnosti a pretvorenie nosných materiálov .................................................................19
3.3 Betón ........................................................................................................................... 20
3.4 Výstuž do betónu..........................................................................................................34
3.5 Spolupôsobenie betónu a výstuže ...............................................................................39
4 Trvanlivosť (Bilčík) ...................................................................................................................... 41
4.1 Agresivita prostredia.....................................................................................................41
4.2 Odolnosť betónu...........................................................................................................42
4.3 Odolnosť betónových konštrukcií.................................................................................44
5 Analýza konštrukcie (Fillo) ...........................................................................................................48
5.1 Návrhový model ...........................................................................................................48
5.2 Imperfekcie...................................................................................................................52
5.3 Redukcia momentov ....................................................................................................53
5.4 Lineárne-pružnostná analýza .......................................................................................54
5.5 Lineárne pružnostná analýza s obmedzenou redistribúciou ........................................55
5.6 Plastická analýza ..........................................................................................................55
5.7 Nelineárna analýza ......................................................................................................57
5.8 Analýza účinkov druhého rádu pri osovej sile..............................................................57
5.9 Klopenie štíhlych nosníkov..........................................................................................61
5.10 Predpätie ......................................................................................................................61
6 Medzné stavy únosnosti (Fillo-Halvoník) .....................................................................................68
6.1 Ohyb a osová sila .........................................................................................................68
6.2 Šmyk ............................................................................................................................79
6.3 Krútenie....................................................................................................................... 87
6.4 Pretlačenie ...................................................................................................................93
6.5 Prútové modely ..........................................................................................................102
6.6 Sústredené namáhania ..............................................................................................104
7 Medzné stavy používateľnosti (Halvoník) ................................................................................. 106
7.1 Kontrola napätí v materiáloch ....................................................................................106
7.2 Kontrola vzniku a šírky trhlín ......................................................................................110
7.3 Kontrola pretvorení.....................................................................................................117
8 Konštruovanie (Bilčík) ............................................................................................................... 125
8.1 Význam vystužovania.................................................................................................125
8.2 Konštrukčné zásady vystužovania.............................................................................126
Literatúra ..............................................................................................................................................135