CONSTRUCTING ENVIRONMENTS LOGBOOK ENVS10003
WEEK ONE 7/03/14 E-learning & Reading Modules LOAD PATH DIAGRAMS
Load path diagram: A load path diagram demonstrates the path an applied force takes when it travels through a permanent load.
Lecture Content In this lecture we discussed the required equipment for this subject and the assessments we will have to complete during the semester. We were also given the task of designing and building a structure made from a single piece of paper that could support the entire weight of a brick at approximately 30mm or above off the ground.
The weight of the brick due to the force of gravity F=mg is applied downwards onto the cylinder of folded paper. The force was evenly distributed across the cylinder and the cylinders reaction force was equal and opposite to the bricks force due to gravity, allowing the paper to support the brick.
Studio Session In this weeks studio session, being the first of the subject, we were introduced to our tutor Warwick Mihaly and also participated in activities to get to know the other members of our tutorial group. Our subject guides were given to us and we discussed what work we had to complete such as our log books and assessments. We discussed the different types of forces experienced in buildings including compression and tension and in which buildings these forces apply. Buildings with dome shaped roofs experience compression forces but not tension forces. Such buildings were used before the invention of materials such as steel. Steel can be used to span great distances under large tension forces allowing the construction of modern buildings such as sky scarpers which could not previously have been built with materials such as brick, stone and wood (beyond certain limits). Tension
Lastly, we began constructing our buildings out of MDF (medium density fibre). We were split into groups and given the task of building a tall compression building with a roof and an entrance that could fit a toy dinosaur. Our group was given the additional challenge of building our tower complete (whole) before excavating an entrance.
A) We used a solid line of bricks to construct the square bottom shape of our building. This gave the building its shape and also a sturdy platform.
C) We began closing the building by aligning the blocks towards the centre of the building instead of directly above the block below. We did not complete the building as we ran out of time.
B) We then constructed the building with an overlapping pattern to make the building more flexible and to reduce the build time.
D) To make the entrance we gently pushed individual blocks out using a pen, to our surprise it did not collapse.
E) Our tutor demonstrated that we didn't need to be so careful when removing the blocks. This is because the blocks are all interconnected and support each other, allowing such an archway to be built.
The overlapping design of our building mean that the weight of the building was applied across the blocks evenly. This overlapping design enabled the building to support itself when the walls as excavated.
F) our design was able to flex and the load was shared between each block allowing it to support itself even with the excavated area.
This image clearly shows the buildings flexibility and demonstrates how the buildings weight is shared across the blocks allowing the building;s walls to flex.
The entrance was successfully excavated and the toy dinosaur was easily abe to fit inside. Succes!
Glossary Jamb: The vertical portion of a frame onto which a door or window is secured. Mullion: A vertical bar between the panes of glass in a window. Beam: A long, sturdy piece of squared timber or metal used to support the roof or floor of a building. Load Path: the path an applied force takes when it travels through a permanent load.
References Newton, C. (2014). W01s1 Load Path Diagrams [Youtube video]. Australia. Retrieved from http://www.youtube.com/watch?v=y__V15j3IX4&feature=youtu.be Build Right. (2012). Retrieved from http://toolboxes.flexiblelearning.net.au/demosites/series10/10_01/content/bcgbc4010a/01_loads _loading/01_primary_loads/page_008.htm Oxford Dictionaries. (2014). Retrieved from http://www.oxforddictionaries.com