External Tendons on Curved Bridges
External Tendons on Curved Bridges
(OP)
Hello Guys,
I just want your opinion about putting external tendons in horizontally curved box girder bridges. Is it feasible? The external tendons are straight in elevation. I think it may require many deviator. Will it be difficult to do in construction?. Can you please tell me the possible disadvantages of this?
Thank you very much
I just want your opinion about putting external tendons in horizontally curved box girder bridges. Is it feasible? The external tendons are straight in elevation. I think it may require many deviator. Will it be difficult to do in construction?. Can you please tell me the possible disadvantages of this?
Thank you very much






RE: External Tendons on Curved Bridges
BA
RE: External Tendons on Curved Bridges
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: External Tendons on Curved Bridges
BA: I agree if the tendon were INTERNAL, however, the OP stated the tendon are EXTERNAL of the box section.
otep: What if the magnitude of the horizontal curve radius? Why are the tendons straight in elevation?
RE: External Tendons on Curved Bridges
Perhaps a sketch would be helpful.
BA
RE: External Tendons on Curved Bridges
Here are the drawings.
We already provided internal tendons but it seems that it is not enough to pass the stresses that's why my boss is thinking of adding external. I just want to know the problems that we may encounter when we pursue adding external than adding additional internal tendons. Almost all of the spans are curved in plan.
Thank you again!
RE: External Tendons on Curved Bridges
Having them profiled vertically as well would be more efficient than seemingly trying to rely mostly on P/A (although that group as shown will still likely have some eccentricity)
Other considerations: what is the construction method? (balanced cantilever span by span etc), do you have room to fit internal tendons in the top or bottom?, do you have room for blisters with your current arrangement without creating sharp curves in the tendons?
RE: External Tendons on Curved Bridges
If you look up repairs to Hammersmith Flyover in London they have dome something fairly similar to repair some 40 year old internal tendons which have rusted away and built and external set of tendons above and below the carriageway ( down the central reservation), but this was for a straight but vertically curved set of section, though some parts were curved. They also fitted some under the structure.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.