1 CONSTRUCTING ENVIRONMENT LOGBOOK
WEEK 2 STRUCTURAL LOADS AND FORCES STUDIO ACTIVITY-FRAME The task of this studio built a bridge that is long enough across a 1500mm gap in a group of 5 people. In addition, the material could be used only the 600mm x 100mm x 2mmm piece of balsa and scotch tape provided. Finally, after the bridge was complete, the tutor will test its stability by adding loads until the structure to collapse.
PROCESS 1. At first, we decided to cut the piece of balsa into 6 rectangular pieces, then we connected 3 pieces of them by scotch tape to 2 pieces whose length is 1600mm. the bridge was designed 2 pieces cross each other at middle like the figure 1. Figure 1
2. However, because the balsa is too thin, the bridge could not hold on the desk. Therefore, we changed our plan as the figure 2. In addition, in order to avoid the stability, we adding 2 small pieces at the end of bridge, like figure 3.
Figure 3 Yang Xuehui
Figure 2 Student No. 709889
2 CONSTRUCTING ENVIRONMENT LOGBOOK
3. Finally, tutor tested our bridge and the bridge collapsed when added the eighth blocks on it. One of the reason that the bridge break down is the connection is weak (figure 4). After fix the connection, this bridge can afford 56 blocks. Therefore this structure is stability.
Figure 4
OTHER GROUP Group 1
This group’s bridge was only one double column so it only can afford 6 blocks. Therefore, this structure is weak.
Group 2
The middle structure of bridge of group 2 was triangle structure, and the ends also used triangle. However, the wright of middle is heavier so this structure cannot afford many blocks.
Yang Xuehui
Student No. 709889
3 CONSTRUCTING ENVIRONMENT LOGBOOK
Group 3
The group 3 used the triangle as their main structure. The load can divided into different load path. Therefore this bridge is stronger than other groups and it afforded 12 blocks.
Glossary Structural Joint: the junction of two or more members of a framed structure. (Merriam-Webster, 2014) Frame: a structure supporting or containing something Column: vertical support Bracing: support of structure Tension: the action of stretching something tight Span: the distance between 2 points
Yang Xuehui
Student No. 709889