do any body know how to deal with the problem of using  FRP rods as suspension bars in the arch bridge?
604074
While FRPs have a higher tensile strength than steel, they have a much lower modulus of elasticity.  In other words, they're very "stretchy."  So using FRP rods for an arched suspension bridge might be a challenge since they'll be long, they won't be of uniform length, and they'll be subject to varying amounts of tension.
981904
Here, found the link below.Wish it is the correct ones. But i suspect since its engineering, u need stronger ones.
843626
What kind of bar ends do you have?  If they are bar caps, rather than ends, then the thing just slots over the end of your bar and you tighten up a grub screw until the cap does not move.  It works by pinching the outside of your bars.\n\nIf you have bar plugs, which look like mushrooms, then you unscrew the allen screw that runs down the middle of the two pieces so that the two are still both on the screw, bu there is a gap between them.\n\nThe plug works by expanding when you tighten the screw, so it squeezes the inside of your bars (unlike caps).  \n\nSo you have unscrewed your bar plug, then you need to insert it into the bar so that the plug is all the way in.  If the plug is a bit sticky and won't go in the bar, it might be because you have a moulding line where the bar was made.  You can just tap the bar end in with a rubber mallet or cover it with a piece of wood and tap the wood with a hammer.  The plug is probably aluminium, so it will just get crushed where the burr is and slide in.\n\nThen you just tighten the screw until it will not tighten any more.  The plug is now in.  Repeat on the other side.\n\n\n\nIt is called ghost pedalling when your pedals do that.  It is usually because your chain is too tight.  Just undo your rear wheel and move it slightly closer to the sprocket and retighten it.  There should be a bit of slack in the chain, but not a massive amount. That should sotp it from happening..\n\nHope that helps.\n\nhttp://www.westernveil.com  (add a pic).
158496
i made one before for my kid but it was out of toothpicks its good to make to stumpy bases on each side then support X's under teh main way going across then do whatever ur diong on top if anything then use regular glue not hot glue but if you wanna speed up the process stick the bridge in the oven on a lowish temperture and let the glue dry then take it out after a short amount of time it should turn out ok!
757047
This link for a PDF File in Rapid Share website, it a book called "Bridges Design Manaual"\n\nI hope it will help you.\n\nhttp://rapidshare.de/files/37074217/bridgedesignmanual.rar
1079574
what's the boundary conditions?\nself weight problem? \nthen, what's the material of the beam?\n\npls be clear :)
245329
Many of the manufacturers websites will have some background theory on their products. Here's an interesting website that claims to even anticipate instead of react to changing cable tension\n\nhttp://www.dfdinstruments.co.uk/ProductTechnology/towingsystem.htm
762462
Do you mean the FEA program if so the most important factor and the one that i used to always get wrong is node number and separation. Try a simple shape with fixed point load and pivot. First try with 10000's of nodes then try with 100's then with just 2 or 3 dependent on shape the difference to the results are big. Node choice comes with experience which i am lacking!!
1045635
You can't use pvc piping, the Laws of the Game state ; \n\nGoalposts and crossbars must be made of wood, metal or other approved material. (Law 1)\n\nSo there's no point of making one of pvc. If you want to do it (make a goal-post), better to do the correct way, or not at all.
306003
By bar I assume you mean reinforcing steel. Each size has a bend diameter. Go to the ASTM and pull up the chart. Next a hydraulic press is best to provide the action.
808644
The failure is mainly due to fatigue due to the cyclic loading on the vanes. Prevention: use a material of high endurance strength. Well, corrosive atmosphere also can initiate failure. So consider the environment in which the vanes are used. Also containment of abrasive particles in the wind-stream is an important factor. This can be avoided using screens.
350798
you can contact me at blade_trinity_mr@yahoo.com and i will send you some PDFs about fiber reinforcement
1066119
Cabela's fish eagle rods are on sale .They are usually 139.99 now are 99.99.These are high quality XML blanks with sensitive tips and strong butt section.Some are designed for bottom bouncing check them out.@ Cabela's.com
740464
Hi, let me tell you before you proceed to read further my answer, i am not answering your question rightaway, but shall share some details with you, presuming you are not aware of them....\n\nUsually, pile cap is designed for a cluster of piles [more than one atleast] or 'Pile Groups' as it is called. The reason being the strengthening of the shaft and the load carrying capacity enhances with more piles than one.\n\nSecondly, as regards to your question i think you are designing for a civil building not a bridge structure[otherwise your question will be totally wrong], in which case, i would suggest you do the design and analysis [i mean finding pile cap resistance and deflection, which many people avoid because of its difficulty] using Staad.Pro or other FEM softwares.\n\nI am providing a link here, see if you find useful. in the meanwhile, let me try to get you a down to earth explanation and understanding for pile cap designs from my collection.\n\nCheck this out, friend. all the best !!\n\nhttp://www.reiworld.com/Product/Tutorials/Foundation/SF4_viewlet_swf.html
488987
A piece of 3/4 plywood might be a good place to start. Use bolts, u-bolts or dowels to hold the tubes in place long enough to tack the joints. You may be able to use something like B-line also. I used spare pieces of B-line (slotted angle steel) for a few bicycle choppers and sissy bars. Good Luck!
686255
your problem is statically determinate. so, use static equations to calculate the tensile force in the cable. maximum sag will occur at the center of the cable where the load should be placed.\n\nyoure asking for deflection and the force. it cannot be. the maximum allowable sag should be used to calculate the tensile force, either, calculate the sag using the allowable tensile force. this can be solve based on the area of the section and the allowable stress.\n\nI hope I was able to answer your question. better if you could send me the figure. my email is exaatto2000@yahoo.com or rbra_engrs@yahoo.com\n\nruel
299017
glue, lots of glue. I had to build a mini-bridge out of toothpicks for a school project to see how much weight it held, and I covered it in glue and it almost won, but another kid cheated and used dow rods and he won, but by very little.