TRUSS LAB REPORT

MANUKAU INSTITUTE OF TECHNOLOGY - FACULTY OF ENGINEERING AND TRADES
NEW ZEALAND DIPLOMA IN ENGINEERING

ENGINEERING FUNDAMENTALS



TRUSS LAB REPORT
(02 MAY 2016)


CREATED BY: ABHISHEK CHIB
LECTURER: CORNELIS KOK



I declare that this assignment contains my own work only. No part of it is either a copy of any other persons work. I have not allowed access to this assignment, in part or in full to any other person. Any work or images that are not my own have been referenced appropriately.


OBJECTIVE: -

The main motive of this experiment is to figure the forces on each joint by the help of engineering structure by pin joint method.

LEARNING OUTCOME:-

In practical application, utilization of engineering designing.
To upgrade technical competency in structure engineering through experiment of laboratory. [1]

THEORY:-

A truss is expected to contain individuals that are connected by method of pin joints and which is supported at both ends by method hinged joints or rollers, is known as statically determinate.
Statically intermediate are the trusses that are supported at more than two positions.
Investigation of these conditions at each node yields the magnitude of the force in every individual from the truss. These might be compression or tension forces.
Diameter of the each road = 5.98mm
Young's modulus = 210GPa [1]

APPLICATIONS OF TRUSS:-

The utilization of application of truss applied for some construction in construction industry.
In the roof top construction, the utilization of truss can be applied.
For the purposes of analysis the trusses are thought to be in pin jointed where the straight segment's meet.
Verticals and diagonals will just act in compression or strain which means that individuals or members are included. [1]




TYPES OF TRUSS:-

[2]






PROCEDURE:-

Make sure that the working of apparatus is proper.
Make the zero reading of the load cell and then rise the load by 100N by looking at the computerized load force display. At that point note down the reading of strain on every joint by turning the dial in display of load cell.
Again make the zero reading of load cell and then increase the load by 200N, 300N, 400N. At that point note down the strain reading indicating the forces carefully.
After calculating the digital values, then we need to calculate the values by the joint method theoretically.
Then we need to draw the strain graphs of each force. The experiment is finished at this point.

ASSUMPTIONS:-


Carefully note down the reading.
Take consideration of the negative and positive indications of the reading on the load force display
Increase the load carefully because the load reading can vary.
Carefully plug the wires in the slot and avoid loose connections for exact reading.


METHOD OF DATA COLLECTION:-





STRAIN
METER
FORCE METER

TRUSS
STRUCTURE

I have calculated the forces by utilizing truss structure which has 7 individuals or members. At that point I got my strain readings by utilizing a digital strain meter and in advanced digital meter there are 14 points and I utilize 7 members because 7 are just required. Distinctive forces are obtained by changing the loads in between 0N to 400N.

HEALTH AND SAFETY:-

Carefully deals with the wire.
Carefully plug the wires in the slot to keep away from any block in working of part.
Deal with the fragile component in the lab with tolerance as it can destroy the polytechnic's property.

EXPERIMENTAL RAW DATA COLLECTED:-



Load [N]
1
2
3
4
5
6
7

AD
DB
DE
AE
EF
FC
FA
0
-15
05
-16
-20
-22
-7
-13
100
-25
10
-5
-30
-11
-2
-23
200
-34
15
6
-41
-2
4
-33
300
-43
21
17
-52
9
9
-43
400
-53
26
28
-63
20
15
-54

REAL STRAIN VALUES:-


Load [N]
1
2
3
4
5
6
7

AD
DB
DE
AE
EF
FC
FA
0
0
0
0
0
0
0
0
100
-10

5
-11
-10
11
5
-10
200
-19
10
-22
-21
20
11
20
300
-28
16
-33
-32
31
16
-30
400
-38
21
-44
-43
42
22
-41


CONCLUSION:-

For this lab it is critical to keep the equipment or tool at the most highest maintaince and carefully utilize by the students in order to get right values.