WorksheetsNZ structural design actions 1
Total questions: 8
Worksheet time: 25mins
In NZ, Limit State Design is used when designing structures. We must consider two limit states: __________ limit state (ULS) for strength and __________ limit state (SLS) for displacement.
(a)
Permanent loads are denoted with the letter
Q
P
D
G
Imposed loads are denoted with the letter
Q
I
L
G
The water in a public swimming pool would be considered
a transitory load
an imposed load
a permanent load
a live load
In ULS design, factors are applied to the
material strengths
deflections
actions (loads}
factors of safety
Different combinations of design actions must be considered when designing a structure. For ULS design, factors ( e.g. 1.2 , 0.9 ) which reflect _________________ are applied to each of the actions in the combination:
(choose two)
the relative sizes of the loads
the degree of certainty of the magnitudes of the loads
the expected duration of the loads
the actual loads in the combination
For SLS design, factors ( Ψs , Ψl ) are applied which reflect:
the relative sizes of the loads
the degree of certainty of the magnitudes of the loads
the expected duration of the loads
the actual loads in the combination
A 5.0 m long beam carries a permanent load of 2.5 kN/m and an imposed load of 12 kN/m. For ULS design of the beam, the total factored load on the beam is
72.5 kN
105 kN
21 kN
114.5 kN
