I am looking at designing a small concrete arch bridge. The owner wants to do reinforced concrete. No precast; he wants it to look like the old European style bridges. The bridge will be for vehicular traffic. It will be approximately 20' wide by 45' long. Attached is a drawing showing the...
I have a unique situation that I'd like people's input on. I am providing the structural design on an elevated steel deck with a huge opening in it. A PEMB sits down on top of the outer columns. The steel deck supports multiple pieces of heavy log merchandising equipment. Equipment being...
Josh,
From your days at Risa, was there a goal to offer non linear static and time history analyses?
The static option would be more valuable for me right now. I think they would start by allowing plastic hinges to form. Then start incorporating material hysteresis behavior to allow time...
This probably a question for Andrew and/or Josh.
In RISA Connection, I am trying to design baseplates for uplift. With WF Columns, RISA Connection won't solve flexural yielding of plate if the anchor bolts are located inside the flanges. The error says "This configuration of bolts is not...
I am trying to design grade beams in Risa Foundation. In the past, I have used Risa3D for this. I modeled discrete compression only springs that had a stiffness equal to the soil subgrade modulus times the tributary area of that spring. Check the reaction at the springs and make sure...
Andrew and/or Josh,
Is RISA intending to incorporate HSS columns into the moment connection designs within RISAConnection? I am doing more of these type of connections (WF Beam-HSS Column) and it would be helpful instead of designing by hand.
I am designing a PEMB foundation. I've designed multiple of these. For DL and SL thrust, usually I use hairpins or ties/grade beams to resist loading. For wind loading, the tension tie can be used to resist the outward thrust from the column in the leeward side. Has anyone used the slab and...
In RISA, I am modeling a wood shear wall sitting on top of a moment frame line below. I am pretty new to using the wood shear wall panel elements, so I am seeing how accurate they are. I created one model with out the wall above and two with the wall above. The model without the wall has the...
I am a structural engineer and not familiar with the best way to manage weld sequencing to minimize distortion. I work in the wood products industry. The company I work for is replacing the v-rails and flat rails that band saws move along. I have attached the drawing of the existing system...
This is probably a question for JoshPlum.
I am retrofitting a bowstring truss with a broken bottom chord. I am using post-tensioned strands to accomplish this. My question is why RISA graphically shows this as a distributed load applied normal to the strand, when it is a thermal load applied...
Has anyone designed a large greenhouse? I am looking at designing a 50'x96' one. I would like to get some feedback from someone that has designed one before.
Thanks,
CJC
I am working in a church building with long span glulam trusses. The trusses span 70' and are 20' o.c. The profile of truss is shaped like the letter A. Pitch is 7:12. The dificult part about this problem is the thrust force. I have to model the truss as pinned-pinned in order to limit...
Hello,
I just got my WA CE/SE license through comity. Does anyone know if I can stamp civil drawings with an SE stamp, or will I need to get two separate stamps?
Cody Cox
Cox Engineering
