LISTA DE EXERCCIOS TRELIAS

Curso: Superior de Tecnologia Disciplina: Resistncia dos Materiais I Professor: Me. Pedro Henrique Cerento de Lyra

EXERCCIO N 1 Calcular as reaes de apoio e as foras normais atuantes nas barras das trelias. a)

RESPOSTA: RAy= 40kN() ; RAx = 20kN() ; RBy= 60kN() NAB = 0 NAC = + 20 kN NAD = + 28,28 kN NBD = - 60 kN NCD = - 20 kN NCE = 0 NCF = + 28,28 KN NEF = - 20 kN NDF = - 40 kN

b)

RESPOSTA: RAy = 40kN(); RAx = 0kN; RBy = 40kN() NAC = NCD = - 136,4 kN NAF = + 132,3 kN NFD = + 47,6 kN NFG = + 89,0 kN NDG = 0 NCF = + 20 kN

c)

RESPOSTA: RAy = 96,3kN() ; RAx = 0kN; RBy = 176,3kN() NAB = 0 NAC = + 96,3 kN NBC = - 160,5 kN NBD = + 90,4 kN NBE = - 213,3 kN NCD = + 128,4 kN NDE = + 157,0 kN

d)

RESPOSTA: RAy = 40,0kN() ; RAx = 40kN(); RBx = 40kN() NAB = + 10,0 kN NAC = + 49,9 kN NBC = - 16,6 kN NBD = - 26,6 kN NCD = + 20,0 kN NCE = + 32,9 kN NDE = - 26,6 kN