Rivet Tensile Capacity

[tbringe]

My office is currently working on a job involving the addition of a steel framed level above an existing steel framed building. The existing structure was built in 1955. The typical beam to column connection is a double-angle connection plus a seated connection with an angle above and below the beam (see link). The top and bottom angles each have two rivets connecting the angles to the column flange. We need to determine how much moment capacity this connection has in order to determine whether we need to reinforce the connections or not. Our question is: what is the tensile capacity of a rivet? In other words, how much tensile force can the rivets in this connection withstand when the moment from the beam is applied to it? I have seen on a aerospace forum that a percentage of the shear capacity (which is 15 ksi) can be assumed for the tensile capacity; however, I am not sure if that applies to this scenario. I understand that this is not a typical application for a rivet; however, reinforcing the connections is extremely difficult and expensive because every column and beam in the structure is encased in concrete (for fire protection). Any information or documentation that could point us in the right direction would be greatly appreciated. Thank you in advance!

 

[metengr]

You can possibly use guidance from older riveted locomotive boiler steels mentioned in the 1952 Edition of Section III of the ASME Boiler Code,

ultimate shear strength of iron rivets in single shear - 38,000 psi
ultimate shear strength of iron rivets in double shear - 76,000 psi

Ultimate shear strength of steel rivets in single shear - 44,000 psi
Ultimate shear strength of steel rivers in double shear - 88,000 psi

 

[CoryPad]

Refer to section 3.3.1 Rivets Subjected to Tension in Guide to Design Criteria for Bolted and Riveted Joints, available here:

http://boltcouncil.org/files/2ndEditionGuide.pdf

 

[desertfox]

Hi

Have a look at this link under the heading of working stresses, it gives a tensile capacity for rivets with safety factors of between 3 and 5.

http://mysite.du.edu/~jcalvert/tech/rivets.htm#Conn