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I am building a bridge model for one of my classes. When conducting my research, I stumbled upon arched-truss bridges. I couldn't find much information on if they'd be stronger than a regular truss bridge due to the arch or not. Could anyone help me?

Hello,

At one of our projects, there was a breakdown of concrete batching plant for about 02 hours while casting post tensioned girder (girders poured to about half of height). The contractor ignored the advice of site engineer and poured the remaining concrete without roughening the surface. After removal of formworks, cold joint cracks were visible. Post-tensioning hasn't been done yet.

I cannot find much literation on cold joint in post-tensioned structures. I do not think it is a good idea to do post-tensioning in such condition.

Can you please share your insights.

Kind Regards

https://preview.redd.it/kwu9v289nhod1.jpg?width=1200&format=pjpg&auto=webp&s=9732b0326fcc460192750da0efd7103974c9bcb0

Hej everyone. New bridge engineer here. 🙂 I have a bridge which spans over train track, where the train might derail and hit the bridge columns and might cause columns/bridge to collapse. The distance from the center and the train truck is smaller than 3 m. Eurocode doesnt define the impact/collision load from the derailed train to the bridge structure. Does anyone know where can I find such information? 🤔

Since we're all bridge geeks here, want to help with a bridge type selection? Check out this overview and option types for the proposed Burnside Bridge and complete the structure type survey at the end: Earthquake Ready Burnside Bridge (participate.online)

Need spreadsheet for design of bridge abutment

Hi! I need guidance about the order of prestressing. Why is it important and where can I study it in-depth?

I am searching for a good manual or guidance with worked examples if there is any. The software itself seems to be outdated a bit but very useful.

I'm a preschool teacher and the kids are currently fascinated with bridges, thei designs, the stories, and the beauty. I am pretty unequipped with my knowledge of bridges and was wondering if any of you bridge experts had any book recommendations for myself as well as for the children.

Thanks! Go bridges!

Thinking about visiting Guizhou province, China since there are obviously quite a few impressive bridges there. Would love to see them in person. Anyone has done just that?

https://www.globaltimes.cn/page/202303/1286969.shtml

Would be great if I can see 3d models or construction plans of some of them beforehand but they are obviously nowhere to be found...

https://youtu.be/WTlgh4TXLuM

This is a question for my bridge engineers of reddit. How do you put Bridges an alligator infested waters? Lakes, rivers, etc? I haven’t found this anywhere on the Internet or even reddit, so I guess I’m the only one who’s wondering. The thought process that started this whole scavenger hunt was the fact that I went somewhere that has a little bridge and you could walk out onto the water and look at the turtles and such but there was a whole fkn alligator in there; So naturally this made me wonder, HOW THE HELL is this process done with dangerous animals around???? please lmk or share your experiences.

Hi there,

Came across this subreddit recently, would be great to bounce ideas off one another when working projects. I live in the UK so use a mixture of the DMRB and Eurocodes for design.

Where are you working? :)

Hey everyone, I tried searching but didn't find anything that helped. I'm building a wooden hiking trail bridge that requires 24 foot stringers. I'm making 3 laminated stringers using 2x10 treated lumber. The problem is the longest dimensional lumber I can get is 20 feet, so I'll need to splice them together, and I know that the splicing will weekend the beam.

So, my question is, is it better to space the splices out over the length of the beam, or better to have as much intact wood towards the center of the beam and have the splices closer together but towards the outer portion closer to the banks. I know the compression and tension forces will be highest in the middle, so my gut says to move the splices to the outer portion.

Any thoughts would be much appreciated, and thanks in advance!

Hello,

Can you please share any resources to prepare for the IStructE CM exam, especially for the bridge question?

For those of you not familiar with the exam, the bridge question requires one to propose two different concept designs for a given situation. These are almost always unique design situations including several site constraints. The biggest challenge (particularly for me) is to be able to come to the best solution in terms of form selection.

TIA