Steel beam connections are categorized into two groups namely framed and seated connections. I don't have the MTRs, but I believe UTS was around 500 - 600 MPa.🕑 Reading time: 1 minuteThere are various types of steel beam connections used in structures. The rivets that were used in that project, were significantly better than base quality structural steel.

Older steels can have large amounts of unwanted elements, and can suffer from rock candy embrittlement after welding. BUT only after veryfing the weldability of the base materials. What Brimstoner suggest, is indeed what has been done in the past. Or you have to change to slip-critical joints, including all the preparation work. If you replace them with bolts, you can fill the void inbetween the shank of the bolt and the bolt hole with some sort of expoxy, in order to 'directly' transfer shear (instead of waiting for some differential movement before shear gets transferred). Lo already mentioned it: they are better than just their theoretical shear capacity, the older and wetter they have been, the better. This gives the shear capacity 'from the beginning', also making all rivets in a connection work together, at the same time from the beginning, much unlike 'normal' bolted joints (not slip-critical). because rivets are installed in hot form, and massively deformed during installation, they completely fill the holes of the plates they join. Have been extensively involved in a renovation project of a large, rivetted bridge some years ago.Ĭaan't comment on the analysis, however some observations: RE: Rivet Analysis Questions kingnero (Mechanical) 10 Jul 22 20:01

Without seeing more about your specific situation, I can't speak into the disconnect you're seeing. But that's not reliable enough to count on without some other evidence. So yes, I agree that 'modern' analysis methods and the tables from your steel manual can be used to sharpen the analysis without issue.Ī well-installed rivet will provide significant clamping force (pretension) across the joint, so they often 'overperform' their specified (shear) capacity. A good rivet (you can tell by the sound when an ironworker first hits on it with a chisel) is generally as or more ductile than a bolt, just weaker. for the coefficients baked into the ICR analysis method), but I seem to recall we used it, had the support of our reviewers (Caltrans), and it worked in the field. I don't recall whether we ever found a researched rationale for applying the same slip and ductility characteristics for rivets as modern bolts (e.g. I've analyzed a number of riveted joints, and a number of jobs where rivets were chipped out (individually) and replaced with high-strength bolts to improve connection capacity. Would anyone be willing to share some insights on the 'modern' analysis procedure? what sort of safety factors do you employ? any sample calculations any of you would be willing to share? Thanks! RE: Rivet Analysis Questions MJCronin (Mechanical) 9 Jul 22 13:22 I am not entirely convinced of this method since, I mean bolts aren't rivets. I did use DG15 table 4-1a to find the strength for A191-49T Rivets, and then utilized C-J3-3/4 to find Fnv and Fnt from the ultimate strength. My best shot has been to treat the rivets as bolts, and working through the connection per chapter J in the steel manual. Doubly so after reading about all the love for rivets people have here.

Heck, the carbon steel bolts also in the connection I'm looking at end up beating them out, which my gut says isn't correct. Using the tables in DG15 (specifically table 4-3b) I end up with the rivets controlling the connection significantly, before I even apply any sort of safety factor. How do I analyze the dang things in a modern context? Steel Manual allows one to analysis existing steel with modern method but beyond that I've got nothing. My main hold up with just using the older methods of analysis that I've seen is they seem a bit uber conservative? I know that the the 15th ed. I've been exploring the forums here, looked through DG15, looked through older editions of the steel manual, etc. We don't really have anyone at our firm right now with any experience with rivets. We've got some rivet connections we'd like to analyze. Hey everyone! We've been doing some analysis on an existing structure built circa the 1950's.

Rivet joint in steel structure