1 CONSTRUCTING ENVIRONMENT LOGBOOK
WEEK 1 Introduction to construction INTRODUCTION TO MATERIALS
Strength – Strong or weak?
Stiffness – Stiff, flexible, stretchy or floppy?
Shape – Mono-dimensional(linear), bi-dimensional (planar), tridimensional (volumetric)
Material Behaviours – isotropic or anisotropic
Economy & Sustainability
BASIC STRUCTURAL FORCES
FORCE: 1.Influence that produces a change in the shape or movement of a body. 2. A vector quantity. 3. Collinear forces occur along a straight line, the vector sum of which is the algebraic sum of the magnitudes of the forces, acting along the same line of action.
TENSION FORCES: 1. Stretch and elongate the material 2.
The
amount
of
elongation
depends on the stiffness of the material, cross sectional area, and the magnitude of the load.
COMPRESSION FORCES: 1. Result in the shortening of the material. 2. Produces the opposite effect of a tension force.
XUEHUI YANG
STUDENT No: 709889
2 CONSTRUCTING ENVIRONMENT LOGBOOK
LOAD PATH DIAGRAMS
STUDIO ACTIVITY- COMPRESSION The task of this studio was building a tower as high as possible in a group of 4 people. In addition, the tower must have least one opening so that an object (a wolf toy) could get in and out. The material provided was only MDF (medium density fiberboard) blocks (figure 1).
Figure 1
1. THE BASE A circular designing was chosen as the base because the same area of circle can used fewer quantity of blocks comparing the other shape. In order that the tower was high enough, the base must be more stable so the structure used like figure 2. This structure can not only has one load path so that the tower will not fall down when the blocks was removed. Furthermore, the opening is formed by removing blocks.
Figure 2 XUEHUI YANG
STUDENT No: 709889
3 CONSTRUCTING ENVIRONMENT LOGBOOK
2. Body The structure we used as same as the base. This structure measure the force can be divided with many load path, so we can added many layers (Figure 3). In addition, the distance between 2 blocks in same layers also important. If the blocks was placed too close, some blocks will be wasted. On the contrast, if the blocks was too
Figure 3
far, slightly deformation will be occurred.
3. The spire At the top, the quantity of blocks was decrease every layer.
4. Test for this tower In order to test the stability of the tower, the tutor let a stone cross the body of tower. If the tower do not fall, the stability is good.
XUEHUI YANG
STUDENT No: 709889
4 CONSTRUCTING ENVIRONMENT LOGBOOK
5. Compare with other group Group 2
Group 2 chose rectangle as the base of tower, and the structure of base and body were different. This tower is very stable, but the tower is not high.
Group 3
The tower of group 3 divide into 3 part as our group, base, body and spire. In addition, group 3 changes their techniques in laying the blocks, which results in greater height. However, the stability is not as good as our group because the area of contact surface between blocks become small.
XUEHUI YANG
STUDENT No: 709889
5 CONSTRUCTING ENVIRONMENT LOGBOOK
Glossary Load Path: the way that the load pass. Masonry: Masonry is bricks or pieces of stone which have been stuck together with cement as part of a wall or building. Compression: the process that result in the shortening of the material. Reaction Force: the magnitude of forces are same, but the direction of forces are opposite. Point Load: A term used in structural analysis to define a concentrated load on a structural member. (Dictionaries of construction, 2014) Beam: long thick piece of material used to support the roof of building.
XUEHUI YANG
STUDENT No: 709889