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www.gruparectan.com
Strona :1
UWAGA!!!: Plik przestawia tylko zestawienie wyników wygenerowanych w programie Kratos, nie jest
pełnym projektem.
Pełny projekt z kompletnymi obliczeniami i rysunkami dla danego zadania można wygenerować
zamawiając Usługę Kratos na www.gruparectan.com
1. Kratownica
2. Ustalenie warunku statycznej niewyznaczalności układu
Warunek konieczny geometrycznej niezmienności i statycznej wyznaczalności kratownicy o strukturze
prostej :
p=2w-r
gdzie :
p= liczba prętów kratownicy
w= liczba węzłów kratownicy
r= liczba stopni swobody odbieranych przez podpory
Kratownica :
/rectanbudownictwo
www.gruparectan.com
Strona :2
warunek : 9=9 , warunek jest spełniony
3. Reakcje podporowe
www.gruparectan.com
Strona :3
4. Obliczenie sił w Prętach
Wybrano Węzeł =1
.................................................................................................................................................................
.................................................................................................................................................................
Wybrano Węzeł =5
www.gruparectan.com
Strona :4
.................................................................................................................................................................
.................................................................................................................................................................
Wybrano Węzeł =0
.................................................................................................................................................................
.................................................................................................................................................................
www.gruparectan.com
Strona :5
Wybrano Węzeł =2
.................................................................................................................................................................
.................................................................................................................................................................
www.gruparectan.com
Strona :6
Wybrano Węzeł =3
.................................................................................................................................................................
www.gruparectan.com
Strona :7
5. Siły w prętach - zestawienie
rysunek jest w skali True
Tabela 1 Siły Prętowe
Pręt N [kN] kąt [ °] L [m] funkcja
0-1 -6,154 90,000 3,00 ściskany
1-3 10,000 0,000 3,00 rozciągany
3-5 0,000 0,000 3,50 jest zerowy
5-4 -13,846 -90,000 3,00 ściskany
2-4 -16,154 0,000 3,50 ściskany
0-2 -16,154 0,000 3,00 ściskany
0-3 8,703 45,000 4,243 rozciągany
3-2 -20,000 -90,000 3,00 ściskany
3-4 21,275 -40,601 4,61 rozciągany
www.gruparectan.com
Strona :8
6. Obliczenie sił w Prętach Metodą Rittera
Moment względem Punktu Rittera [0;0]
Moment względem Punktu Rittera [3;3]
.................................................................................................................................................................
www.gruparectan.com
Strona :9
Wybrano Przecięcie =1
Moment względem Punktu Rittera [6,5;0]
Moment względem Punktu Rittera [3;3]
.................................................................................................................................................................
www.gruparectan.com
Strona :10
7. Obliczenie sił w Prętach Metodą Cremony
Wykres Cremony
.................................................................................................................................................................
www.gruparectan.com
Strona :11
Aby określić wartości sił należy porównać wykreślone wektory sił ze skalownikiem
.................................................................................................................................................................
Wydruk Kratos
Copyright © 2014 Grupa Rectan
www.gruparectan.com

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Kratownica Politechnika Lubelska - Przykład A

  • 1. www.gruparectan.com Strona :1 UWAGA!!!: Plik przestawia tylko zestawienie wyników wygenerowanych w programie Kratos, nie jest pełnym projektem. Pełny projekt z kompletnymi obliczeniami i rysunkami dla danego zadania można wygenerować zamawiając Usługę Kratos na www.gruparectan.com 1. Kratownica 2. Ustalenie warunku statycznej niewyznaczalności układu Warunek konieczny geometrycznej niezmienności i statycznej wyznaczalności kratownicy o strukturze prostej : p=2w-r gdzie : p= liczba prętów kratownicy w= liczba węzłów kratownicy r= liczba stopni swobody odbieranych przez podpory Kratownica : /rectanbudownictwo
  • 2. www.gruparectan.com Strona :2 warunek : 9=9 , warunek jest spełniony 3. Reakcje podporowe
  • 3. www.gruparectan.com Strona :3 4. Obliczenie sił w Prętach Wybrano Węzeł =1 ................................................................................................................................................................. ................................................................................................................................................................. Wybrano Węzeł =5
  • 4. www.gruparectan.com Strona :4 ................................................................................................................................................................. ................................................................................................................................................................. Wybrano Węzeł =0 ................................................................................................................................................................. .................................................................................................................................................................
  • 5. www.gruparectan.com Strona :5 Wybrano Węzeł =2 ................................................................................................................................................................. .................................................................................................................................................................
  • 6. www.gruparectan.com Strona :6 Wybrano Węzeł =3 .................................................................................................................................................................
  • 7. www.gruparectan.com Strona :7 5. Siły w prętach - zestawienie rysunek jest w skali True Tabela 1 Siły Prętowe Pręt N [kN] kąt [ °] L [m] funkcja 0-1 -6,154 90,000 3,00 ściskany 1-3 10,000 0,000 3,00 rozciągany 3-5 0,000 0,000 3,50 jest zerowy 5-4 -13,846 -90,000 3,00 ściskany 2-4 -16,154 0,000 3,50 ściskany 0-2 -16,154 0,000 3,00 ściskany 0-3 8,703 45,000 4,243 rozciągany 3-2 -20,000 -90,000 3,00 ściskany 3-4 21,275 -40,601 4,61 rozciągany
  • 8. www.gruparectan.com Strona :8 6. Obliczenie sił w Prętach Metodą Rittera Moment względem Punktu Rittera [0;0] Moment względem Punktu Rittera [3;3] .................................................................................................................................................................
  • 9. www.gruparectan.com Strona :9 Wybrano Przecięcie =1 Moment względem Punktu Rittera [6,5;0] Moment względem Punktu Rittera [3;3] .................................................................................................................................................................
  • 10. www.gruparectan.com Strona :10 7. Obliczenie sił w Prętach Metodą Cremony Wykres Cremony .................................................................................................................................................................
  • 11. www.gruparectan.com Strona :11 Aby określić wartości sił należy porównać wykreślone wektory sił ze skalownikiem ................................................................................................................................................................. Wydruk Kratos Copyright © 2014 Grupa Rectan www.gruparectan.com