Load Transfer Flashcards Preview

Technology 3 - Building Science and Structures > Load Transfer > Flashcards

Flashcards in Load Transfer Deck (46):
1

Define strength as a structural principal

Strength of all structural elements, and of structure as a whole, must always be greater the the stresses induced by the loads and forces

2

Define Stability as a structural principal

The structure must have a reasonable factor of safety against collapse and over turning due to application of loads.

3

Define Robustness as a structural principal

Structure must be able to withstand the effects of accidental misuse or malicious damage without disproportionate collapse.

4

Define Equilibrium as a structural principal

All loads, forces and the moments that they cause on the structure bust be balanced by the reactions so that the structure experiences no movement.

5

What is defined by the structure of a building

The elements of construction which accept the loads and forces imposed upon the building in a way that it remains strong, stable and robust. Loads, forces and reactions are all in equilibrium and deformations are kept within acceptable limits.

6

What are the components of a Building Structure (4)

Roof, Floors, Walls, Foundations

7

What is the function of the Roof

To bear the roof dead load, and transfer any imposed loads to the walls.

8

What is the function of the Floor

To bear dead load of the wall structure, and transfer any imposed loads to walls or ground.

9

What is the function of the Walls

To bear the dead load of the walls, accept loads from the floor and roof and transfer them to the foundations.

10

What is the function of the Foundations

T accept loads from from walls and transfer them to the ground.

11

Why must load acceptance and transfer be accomplished

So that the stresses inside and deformation of the materials are kept within acceptable limits.

12

What does 1n equate to

1 Kilogram of Mass x Acceleration of 1m/sec2

13

What does 1kn equate to

1000n = 1000kgm/sec2

14

What is mass defined as

The total amount of substance a physical object comprises of

15

What is weight defined as

mass x acceleration due to gravity (approx 10m/sec2)

16

Define Deadload

The self weight of the structure and all permanent fixtures

17

The self weight of the structure and all permanent fixtures refers too

Dead Load

18

Define Liveload

A loading allowance for building use

19

A loading allowance for building use refers too

Liveload

20

Define Wind Load

A loading allowance due to wind pressure

21

A loading allowance due to wind pressure refers to

Wind Load

22

Define Uniformly-Distributed Loads (UDL)

Spread loads eg floor, roof

23

Spread loads eg floor, roof refer to

Define Uniformly-Distributed Loads (UDL)

24

Define line loads

loads along a line eg wall and strip footing loads

25

loads along a line eg wall and strip footing loads refer to

Line loads

26

Define Point Loads

forces at a point eg column loads

27

forces at a point eg column loads refer to

Point Loads

28

What is the definition of Equilibrium

All the forces on the structure and the moments that they cause must be balanced by the reactions so that the structure mains stable and experiences no movement.

29

What is a moment

It is the twisting effect of a force about a centre of rotation. Similar to effect of a spanner to tighten a nut.

30

What is the equation for calculating moments

moment (kNm) = force (kN) x lever arm (m)

31

What is the equation for calculating point loads

moment (kNm) = value of point load (kN) x Lever arm (m)

32

What is the equation for calculating line loads

moment (kNm) = line load (kN/m) x length considered (m) x lever arm (m)

33

What are the two types of load

concentrated / Point load, distributed load

34

what are the four main principles of structures

strength, stability, robustness, equilibrium

35

what are the six structural components

roof, floors, walls, foundations, structural frames, connections

36

what are the two types of load described as

live load and dead load

37

define live load

the weight of people and their movement.

38

define dead load

self weight of structure and imposed loads

39

what are the 4 types of distributed load

uniformly distributed load, tapered patch load, patch load, tapered distributed load

40

what are the 3 types of forces acting on a structure

reactions, shear force, bending moment

41

What are the different components of reactions on a beam with a point load

L = length of beam, P = point load, VL = support left, VR = support right, A = left of P, B = right of P

42

How do you calculate the reaction of VL on a beam with a point load

P (load) x B (right of P) divide by length

43

How do you calculate the reaction of VR on a beam with a point load

P (load) x A (left of P) divide by length

44

how do we calculate the sum of reactions of beam with a point load

0.5 x P (load)

45

how do we calculate the bending moment at P (load) on beam with a point load

load (P) x left of P (A) x right of P (B) divide by length (L)

46

how do we calculate the bending moment at the mid point on a beam with a point load

load (P) x length (L) divide half of length