constructing week 1&2 logbook

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Week 1 Logbook

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Page 1: Constructing week 1&2 logbook

Week  1    Logbook  

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Glossary  

Load  path   A  path  that  seismic  forces  pass  through  to  the  founda4on  of  the  structure  and,  ul4mately,  to  the  soil.    

Tension  force     When  an  external  load  pulls  on  a  structural  member,  the  par=cles  composing  the  material  move  apart  and  undergo  tension.  (Ching,  2011)    

Masonry  construc=on  

A  form  of  construc=on  iden=fied  by  self-­‐suppor=ng  walls  of  masonry,  e.g.,  brick,  stone  or  hollow  concrete  block.  

Compression  force    

Compression  force  produces  the  opposite  effect  of  a  tension  force.  .  (Ching,  2011)    

Beam     Sturdy  piece  of  squared  =mber  or  metal  used  to  support  the  roof  or  floor  of  a  building.  

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Tutorial  ac=vity:  In  the  tutorial  ac=vity,  we  have  divided  our  tutorial  group  into  small  group  and  we  have  four  people  in  our  group.  Our  aim  is  using  Medium  Density  Fiberboard(MDF)  to  build  a  tower  as  a  group  as  higher  as  possible.    

We  are  star=ng  off  by  building  a  square  founda=on  because  we  think  it  is  the  most  stable  structure.    

As  the  wall  goes  higher  the  load  path  to  the  ground  becomes  more  heavier.  And  base  on  the  Newton  3rd  law  that  The  law  of  ac=on  and  reac=on  states  that  for  every  force  ac=ng  on  a  body,  the  body  exerts  a  force  having  equal  magnitude  and  the  opposite  direc=on  along  the  same  line  of  ac=ons  as  the  original  force.  So,  at  that  =me  the  reac=on  force  from  the  ground  to  the  wall  is  the  same  quan=ty  of  the  force  as  the  wall  reacts  to  the  floor.        

Ref:  Ching,  F.  D.  (2011).  Building  construc.on  illustrated.  John  Wiley  &  Sons.  Chicago  

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As  the  wall  raises  to  a  certain  level  we  decide  to  construct  a  closed  rood.  Therefore  we  change  our  square  structure  into  circle.  That  we  we  can  keep  a  tendency  which  goes  inwards  to  the  center  of  our  tower.  However  aZer  we  build  couples  of  levels,  we  have  realized  that  is  not  stable  and  we  can  not  keep  build  like  that.  The  bricks  is  keep  dropping  once  we  put  it  on.  

Therefore,  we  find  a  new  way  which  like  the  diagram  shows  we  put  one  bricks  on  the  top  of  two  and  keep  a  inward  tendency.  Even  though,  it  falls  again  but  it  is  actually  a  be]er  was  to  use.  

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There  is  a  group  build  a  pre]y  successful  tower  with  a  closed  roof  by  using  the  a  basically  shell  structure.  Their  structure  is  quite  stable  and  they  have  a  balanced  their  load  path  so  they  can  put  a  equal  weight  box  on  it.  

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Week  2  

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Frame  structure   Membrane  Structure  in  Melbourne  

Shell  structure.  (Sydney    Opera  House)    Skeletal  Structure    

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Lecture  ac=vity    

In  the  lecture,  we  have  understood  that  with  the  right  structure,  a  plas=c  bowl    and  some  straw,  it  can  hold  a  thing  which  might  be  many  =me  of  it  is  own  weight.  And  we  can  also  see  that  triangular  structure  is  very  much  more  stable  than  many  others.    

Tutorial  ac=vity  

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In  the  tutorial  ac=vity  we  have  to  construct  a  stable  tower  using  pieces  of  balsa.  We  must  make  sure  the  tower  can  stay  in  place  with  the  forces  applied.    This  is  a  skeletal/frame  structure,  we  enhanced  the  structure  by  placing  triangular  diagonals  within  the  tower.      We  started  with  a  square  base  while  we  are  building  we  put  a  support  in  the  middle  as  a  triangular  support  and  make  it  more  stable.  

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