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Author Topic: Bridge Design Challenge  (Read 1848 times)

Offline Dichotomy

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Re: Bridge Design Challenge
« Reply #30 on: February 12, 2011, 08:41:57 PM »
Quote from: grizz441 on February 12, 2011, 08:39:41 PM
I figured it would be fun for a lot of posters on here, there are some smart folks.  We now await patiently for the sunbat p.e. to chime in.   :rock

Truth Grizz

I do want to hear what Sunbat has to say. 
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Offline Belial

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Re: Bridge Design Challenge
« Reply #31 on: February 12, 2011, 09:32:17 PM »


                               ///////////////////////\
                             /                              \
                           /                                 \
                   :::::::::::::::::::::::::::::::::::::::::::::::
                   """"""""""""""""""""""""""""""""""""""""""""""""""""""""


This should work
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Offline SunBat

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Re: Bridge Design Challenge
« Reply #32 on: February 12, 2011, 09:40:18 PM »
Do u have to worry about how this is going to be built or is it just theory?
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AoM
Quote from: Skuzzy on May 13, 2014, 03:13:54 PM
Do not get caught up in the country-centric thinking.
The great thing about irony is that it splits things apart, gets up above them so we can see the flaws and hypocrisies and duplicates. - David Foster Walla

Offline grizz441

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Re: Bridge Design Challenge
« Reply #33 on: February 12, 2011, 11:05:50 PM »
Quote from: SunBat on February 12, 2011, 09:40:18 PM
Do u have to worry about how this is going to be built or is it just theory?

I have to worry about how the thing is going to be built.
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Offline SunBat

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Re: Bridge Design Challenge
« Reply #34 on: February 12, 2011, 11:36:03 PM »
Just fill the river up with a bunch of Grizz carcasses.  They are hollow enough to allow the water to flow through but have heads big enough to support any weight necessary. 
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AoM
Quote from: Skuzzy on May 13, 2014, 03:13:54 PM
Do not get caught up in the country-centric thinking.
The great thing about irony is that it splits things apart, gets up above them so we can see the flaws and hypocrisies and duplicates. - David Foster Walla

Offline grizz441

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Re: Bridge Design Challenge
« Reply #35 on: February 12, 2011, 11:38:17 PM »
Quote from: SunBat on February 12, 2011, 11:36:03 PM
Just fill the river up with a bunch of Grizz carcasses.  They are hollow enough to allow the water to flow through but have heads big enough to support any weight necessary. 

Picture pls, I'm a visual learner.
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Offline phatzo

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Re: Bridge Design Challenge
« Reply #36 on: February 13, 2011, 12:49:12 AM »
Quote from: SunBat on February 12, 2011, 11:36:03 PM
Just fill the river up with a bunch of Grizz carcasses.  They are hollow enough to allow the water to flow through but have heads big enough to support any weight necessary. 
I just pee'd
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Offline Dadsguns

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Re: Bridge Design Challenge
« Reply #37 on: February 13, 2011, 08:49:49 AM »
Typical engineering or over engineered project... all about cost cutting and no safety or common sense concerns.   :devil

 :lol
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"Your intelligence is measured by those around you; if you spend your days with idiots you seal your own fate."

Offline grizz441

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Re: Bridge Design Challenge
« Reply #38 on: February 13, 2011, 11:11:08 AM »
Quote from: Dadsguns on February 13, 2011, 08:49:49 AM
Typical engineering or over engineered project... all about cost cutting and no safety or common sense concerns.   :devil

 :lol

Elaborate please.  (If you can)
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Offline grizz441

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Re: Bridge Design Challenge
« Reply #39 on: February 13, 2011, 12:43:43 PM »
Dads, the design code establishes the level of safety of a structure, this has no bearing on safety, this is just attempting to come up with the most efficient design.  You could design a bridge with the same level of safety as one that cost a million dollars less all based on how you did it.  So deciding on pier locations, number of piers, material, type of bridge, are all important steps in determining the most economical way to design a bridge without compromising safety.  They are not related because regardless of how you arrange your elements, they all must be designed to AASHTO design specification.
« Last Edit: February 13, 2011, 12:45:56 PM by grizz441 »
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Offline grizz441

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Re: Bridge Design Challenge
« Reply #40 on: February 13, 2011, 04:53:17 PM »
Idea 3:

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Offline SunBat

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Re: Bridge Design Challenge
« Reply #41 on: February 13, 2011, 05:52:12 PM »
Quote from: grizz441 on February 13, 2011, 04:53:17 PM
Idea 3:

(Image removed from quote.)

An arch could be very efficient but not like that.
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AoM
Quote from: Skuzzy on May 13, 2014, 03:13:54 PM
Do not get caught up in the country-centric thinking.
The great thing about irony is that it splits things apart, gets up above them so we can see the flaws and hypocrisies and duplicates. - David Foster Walla

Offline grizz441

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Re: Bridge Design Challenge
« Reply #42 on: February 13, 2011, 05:56:57 PM »
Quote from: SunBat on February 13, 2011, 05:52:12 PM
An arch could be very efficient but not like that.

Explanation pls.   :D
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Offline SunBat

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Re: Bridge Design Challenge
« Reply #43 on: February 13, 2011, 06:08:51 PM »
U have huge piers at both ends that are seeing very large shears at the top from the arch developing the compression it needs to be a good arch. This is inefficient because u have to design the piers to resist the shear from the arch and the shear also ptoduces a huge moment in the pier that will require a large footing or a deeper pier.  Your banks can be natural buttresses that the ends of the arch could push into with much smaller foundations because they will be in pure compression. 

Plus, you can make the arch smaller and use the banks with small abutments as supports at the end.

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AoM
Quote from: Skuzzy on May 13, 2014, 03:13:54 PM
Do not get caught up in the country-centric thinking.
The great thing about irony is that it splits things apart, gets up above them so we can see the flaws and hypocrisies and duplicates. - David Foster Walla

Offline grizz441

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Re: Bridge Design Challenge
« Reply #44 on: February 13, 2011, 06:26:46 PM »
Quote from: SunBat on February 13, 2011, 06:08:51 PM
U have huge piers at both ends that are seeing very large shears at the top from the arch developing the compression it needs to be a good arch. This is inefficient because u have to design the piers to resist the shear from the arch and the shear also ptoduces a huge moment in the pier that will require a large footing or a deeper pier.  Your banks can be natural buttresses that the ends of the arch could push into with much smaller foundations because they will be in pure compression. 

Plus, you can make the arch smaller and use the banks with small abutments as supports at the end.



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