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| We have read the stage1 brief and our team want to make clear the use of the model (the association with the final ), its ratio, and can we use the extra material outside of the given material. the other, what's the base area of the hospital? |
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 Zhou Jie posted on Friday, September 17, 2010 - 08:03 am
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| our team "ADW" wants to know about it too.Can we use the extra material? |
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Hi Jianzhong
The idea is that you will be making a scale model of the structural design for your building. This will be tested on the shaking-table at the final and is a way of proving to Mr Dunwell that you have an efficient earthquake resistant design.
By "ratio", I think you mean the "scale" of the model. It is 1:100 and this information is given in section 1 of the Specification for the the Model Building and Shaking-table Tests. Read this section and the whole specification very carefully to understand the relationship between the model and the final building. It is important that you realise that one storey in the model building is equivalent to 3 storeys in the real building.
The base of the real hospital is equivalent to the area of the mdf base board in the model, so scaling up that is 25 metres by 25 metres.
The other important thing is that we are looking for the most efficient model as defined in section 8.2 of the Specification. This means that you are trying to achieve a balance between the strength of the building and its cost (you can decide this though judgement or by building and testing some models). Regarding the materials, there is a limit on the amount that you can buy. You want to buy the minimum amount of material possible for your design and use every piece (e.g. mdf strip, piece of paper) as efficiently as posssible. |
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| Liu Bo posted on Friday, September 17, 2010 - 08:46 am
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I am from Grp 2.wuhan university of technology.
We want to know the specific seismic intensity of the town Mochalatte. |
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| Liu Bo posted on Friday, September 17, 2010 - 09:05 am
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I am from Grp 2.wuhan university of technology.
We have known from the stage1 brief that there have been about 40 earthquakes of at least Magnitude 6.0.And we want to know some more specific information such as the rate of earthquakes of Magnitude 7.0 ,8.0 or 9.0. |
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| Liu Bo posted on Friday, September 17, 2010 - 09:16 am
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I am from Grp 2.wuhan university of technology.
We want to make clear that if the town Mochalatte is the epicenter and what about the hypocenters' depth in these 40 earthquakes . |
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Hi Bo
The structural side of the challenge does not require in depth calculations. It is a conceptual challenge where we want you to think about how your building may behave during an eathquake and then for you to ensure that you have a good structural system with all the elements required to resist the types of forces that will occur.
If you want an idea of the earthquakes we will use on the shaking-table for your model, they will be similar to the ones we used for the challenge in Korea. This information can be found at http://www.ideers.bris.ac.uk/Discussion/messages/101/303.html?1247588550 |
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| Wang Jieshi posted on Friday, September 17, 2010 - 03:25 pm
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| Hi,I am Wangjieshi from Tianjin University.I want to know the requirement of architectural appearance and functional. |
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| Adam Crewe posted on Friday, September 17, 2010 - 04:14 pm
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Because Mr Dunwell is not an engineer or architect he is leaving it to you to propose some plans for the form and appearance of the hospital.
If you look in the "Specification for model building and shaking-table tests" you can find the main specifications for the building, floor areas, floor heights etc. and as long as you remain within the basic rules you have freedom to do what you want and then persuade Mr Dunwell that your concept is the best. |
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| Song Xiaoran posted on Friday, September 17, 2010 - 04:15 pm
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| Hi,Daniell.I am from civil stand,from Tianjin University.I want to know the total height of the hospital which is not mentioned in the stage 1 brief.I also want to make it sure that the ratio of the model,since we can not find the figue "1/100"in any page of the stage 1.The third question is that how to fing the toal cost of the hospital,because you don't give us thecost of the non_structual material.Any building is made of two parts:structure and non-structure.Both sides are of great importance.Without structure,buildings can't stand stable;without non-struture,people can't live a comfortable life.DO YOU THINK SO?Thanks and may you a happy weekend |
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| Adam Crewe posted on Friday, September 17, 2010 - 04:26 pm
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Take a look in the "Specification for model building and shaking-table tests" for answers to your questions but in summary:
1) You have freedom to chose the height of the building and the number of floors although your model must have at least 4 floors (10 in the real building - see figure 1 in the document). Take a look at section 5 "Rules for the Structure of your Model" for details of the model which defines the minimum and maximum floor areas.
2) In the introduction in that document it says "Your model will be scaled to 1/100th of the size of a real building (i.e. to a scale of 1:100)"
3) For the competition you only need to consider the cost of the structure. I agree the cost of the non-structural elements of the hospital would be important but it would be difficult to work out these costs without specialist knowledge so this is not part of this competition. |
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| Song Xiaoran posted on Monday, September 20, 2010 - 05:48 am
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Can you give me the allowable stress of the stirps and the cotton strings?And I also would like to know about the elastic modulus and Poisson ratio .Last but not least, we need the constitutive equation of the wood,with which I can deal with the elasto-plastic analysis of buildings against earthquake.Thanks.
P.S Another question from my teammate,his computer is down.Can we use other sections of the stirps?With sicssors,we can get other dimensions. |
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Hi Xiaoran
You don't need to do calculations for this challenge. This is a conceptual challenge and we want you to think about the structural elements required within your building to resit the forces imposed on it during an earthquake. You need to use judgement rather than calculation.
However, if you want to do some approxiate calculations you should be able to find properties for the materials you are using on the internet.
You will find it very difficult to reduce the cross section of the mdf strips by cutting them. You can however increase it by using 2 or 3 sticks glued together.
To find out about the types of materials you will using, see
http://www.ideers.bris.ac.uk/Discussion/messages/101/1175.html?1247772353
and
http://www.ideers.bris.ac.uk/Discussion/messages/101/474.html?1274032472
Make sure you always read the FAQ section before asking questions as you may find the information your are looking for there. |
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| Zheming Chen posted on Friday, September 24, 2010 - 09:34 am
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| I am from Grp 7. I want to ask whether can not only put the loads on the floor, but also hang them on it.Thanks. |
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Hi Group 7
The steel blocks must be firmly placed on the floor. However, the floor can either be fixed, or it can be allowed to slide or hung, effectively behaving like a floor isolation system. |
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| Liu Bo posted on Wednesday, September 29, 2010 - 09:08 am
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Dear Sir,
I'm from Team12-Grp2 of WuHan University of technology.
We want to make clear that what kind of spectrum characteristics of the shaking-table is.And is the earthquake wave actual or artificial simulated(simple harmonic wave£©£¿
While the shaking-table is shaking, is the spectrum characteristic changed? |
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| Liu Xi posted on Thursday, September 30, 2010 - 05:06 am
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Dear judge:
We are wandering that how the cost is based.Is it based on per square metre or just the total?
Moreover,Are the steel blocks placed on the model during the earthquake test? Thank you. |
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| Liu Bo posted on Thursday, September 30, 2010 - 10:12 am
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Hi,professor:
How long will it last that the shaking-table shakes in a certain frequency?
How much is the phase of the earthquake waves from two different directions? Whether the phase is unaltered or not? |
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To Liu Bo
For now please assume the earthquakes on the shaking-table will have the same characteristics as those used for the Korea tests. The shake in China will be similar and once we know, we will let you know on the FAQ if it is any different. |
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To Liu Xi
You may not have a flexible floor as the blocks will be free to move on the floor effectively isolating your structure from any earthquake loading. The steel blocks must be fixed firmly to a solid floor.
You can however design a floor isolation system where your floor is free to slide on the structure. You can also use string within the construction of the floor but the blocks must not be able to move relative to the floor they are supported on. |
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| Chen Luyao posted on Wednesday, October 13, 2010 - 04:14 pm
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Professor:
can we tie the steel block to the floor with cotton line? |
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| Adam Crewe posted on Wednesday, October 13, 2010 - 05:15 pm
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You should not rely on string to hold the steel blocks onto your model.
What we will do at the final is first to check that all constructucted models obey the rules (that may be what you think the testing without steel blocks means). The models will then be fixed to the shaking-table and the steel blocks will be added afterwards. We don't know whether the teams will be allowed on to the shaking-table to add the blocks or to do any final fixing of the blocks. This means that you should not plan to tie the sets of steel blocks together as this would be difficult for someone else to handle. You can however design your fixings for each floor for each set of blocks rather than one fixing for one block. I would recommend that use the MDF strips for your fixings as they will hold the blocks firmly in place. String will loosen during the shaking and then your blocks would fall out of the building and the model will then be judged to have failed. |
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| Xiong Chen posted on Thursday, October 14, 2010 - 12:51 pm
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Hello professor
we are team 4, we want to know do we have to use the paper as the floor. If we only use MDF strips to build the floor, dose the hollow part of the floor count to the floor area.
thank you! |
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| Adam Crewe posted on Thursday, October 14, 2010 - 03:44 pm
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You don't need to use paper to show the floor area and can just have MDF sticks. In this case we will assume that the floor is defined by the external dimensions of the outmost edge beams. However if you want to include something like an atrium in the building you will need to use the paper to show what is floor and holes can be left to show where any atrium is.
Although paper is not necessary you might nevertheless find it useful in the floors as it will provide a lot of in-plan stiffness and can help to reduce in plan distortion of the floors. |
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| The first rule is "It must have at least 4 horizontal floors, with MDF edge beams defining all boundaries of the floor. " Here the floor area is calculate by the "MDF edge beams" because they are defined as all boundaries of the floor"and the second rule is "A flat roof will be treated as a floor.Not counting the ground floor, the total area of all of the other floors must be between 750 cm2 and 950 cm2. The floor area includes the space taken by the columns." Here the floor area is calculate by the "The floor area includes the space taken by the columns." There are discrepant,because the MDF have thickness,and which rule do we according to calculate?Thank you very much£¡ |
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| Adam Crewe posted on Friday, October 15, 2010 - 09:36 am
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Here is a picture showing how floor areas are calculated. All dimensions are to the edges of the beams. If you don't have voids in your floor then obviously ignore that bit.
In this picture each column takes up 4x6=24mm but the total of 96mm2 is not subtracted from the 24300mm2 floor area. This is being done to simplify things when we come to checking floor areas at the final. |
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| Chen Luyao posted on Friday, October 15, 2010 - 04:16 pm
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Professor
Why can we not attach the post ?
we have some changes in our post, but just could not attach the upload... |
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| Adam Crewe posted on Friday, October 15, 2010 - 04:28 pm
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| Don't panic just send the new version by email to me at A.J.Crewe@bristol.ac.uk and I'll make sure we look at that version. Sorry about the difficulties you are having. |
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| Chen Luyao posted on Saturday, October 16, 2010 - 05:39 am
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Professor
Thank u very much!
we finally upload the post successfully!
Team 27
The Soul of Steel. |
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Here I have two questions to ask you,thank you!
The Cotton String is sell by one meter each time, or sell by the length we want?
Could we glue the blocks into the floor, cage and to use glue to fill any gaps around the blocks, which you have said in the India's Game. And will we have to calculate for the extra glue used to fix the blocks into the model?
Thank you very much. |
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Hello Shen Chuangrong
You will have to buy cotton string in whole metre lengths e.g. 3m, 5m etc but not in portions of metres e.g. 4.2m.
The blocks will be glued into the cages once your model has been fixed on the shaking table. This will be done by either the teams or some technicians depending on who the host allows on to the shaking table. You do not have to pay for that glue. |
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| Zheming Chen posted on Wednesday, November 17, 2010 - 04:35 am
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Hi,Professor.I am from Grp 7.
Here I have two questions to ask you.
First,If our model has balconies,I want to know whether they are the part of the area of the story.
Second,can the loads be only put on the Cotton string(not on the mood of the story)?
Thanks. |
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Hi Zheming Chen
If your model has balconies, then these will be counted as part of your floor area.
It would not be a good idea to support the steel blocks on the cotton string. You can if you like but the blocks will move around too much during the shaking table tests and we would have to disqualify you. |
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| Xiong Chen posted on Thursday, November 18, 2010 - 10:02 am
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Hi,Professor.I am from Grp 4.
I have three questions.
* will the steel blocks been provided during the construction?
* Could the structure go beyond the 22.6*22.6 area on the base board?
* If we have a 60cm long MDF strip left after the construction, does it counted in the cost?
thank you! |
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| Adam Crewe posted on Thursday, November 18, 2010 - 10:07 am
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1) Yes so you can check they fit into your model.
2) Yes but not at the level of the base board. We need the space on the base board to clamp the models to the shaking table.
3) Yes. You may be able to return completely unused materials to the shop but you cannot sell partically used materials back. You may be able to sell them to other teams however. |
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| Xiong Chen posted on Thursday, November 18, 2010 - 10:14 am
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Hi prof. Crewe
If the materials is not enough during the construction, could we buy some from the shop?
thank you! |
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| Adam Crewe posted on Thursday, November 18, 2010 - 10:25 am
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| The shop will be open all day so you can buy materials as you need them |
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| Luo Zheng posted on Thursday, November 18, 2010 - 02:47 pm
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http://photo.renren.com/photo/sp/hepRzo5Lk4X
Hi,Professor.
Our model is hexagonal.There are two horns exceeded 22.6*22.6cm area at the level of the base board.The outside perimeter which do not comply with requirements is about 40mm.Will our model fix on the shaking table?
If it is able to clamp the model to the shaking table,can we make our model without any adjustment? |
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| Adam Crewe posted on Thursday, November 18, 2010 - 03:32 pm
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| The base boards will be predrilled with 8 holes ready to clamp them to the table (4 in the corners and 4, one in the middle of each side). It looks like your model will be in the way of these holes. Can you rotate it a bit so that all is kept way from the centre of each edge. If so I think this should be OK. |
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| Xiong Chen posted on Friday, November 19, 2010 - 06:44 am
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Hi.professor,
could we only use the 4 predrilled holes in the corner to clamp our model, beacuse our model may exceed the 22.6*22.6 area and collide with the holes in the middle of each side.
thank you! |
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| Luo Zheng posted on Friday, November 19, 2010 - 03:10 pm
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Dear prof.Crewe,
You said:"Although paper is not necessary you might nevertheless find it useful in the floors as it will provide a lot of in-plan stiffness and can help to reduce in plan distortion of the floors."
We want to know what kind of A4 paper it is.Because common paper is too weak to provide a lot of in-plan stiffness unless we use a lot of paper .Of course that method
will cost much. |
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| Zheming Chen posted on Saturday, November 20, 2010 - 04:09 pm
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Hi,Professor.I am from Grp 7.
Do the floors have to be covered by A4 papers?
Thanks. |
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