This is continuation of the conversation started in a previous thread (thread507-475991).
I was unable to work on the topic for a while since I was busy with some projects, however, after getting some time I went through all the comments and came up with a solution. I just wanted to post my...
Thank you all for your insights. I am of the same opinion as JoshPlumSE that one portion deals with localized effects while the other deals with the overall section. However, I was having a difficult time convincing my manager since he felt that both portions deal with tensile rupture of the...
Hello Everyone,
I was checking the limits of drilling holes in flanges of beams without affecting the flexural capacity of the section and I found 2 pieces of contradictory information.
1. In section F 13.1 (Strength Reductions for Members with Holes in the Tension Flange), the code says that...
@ ATSE You are correct. This is a welded steel structure without any concrete slab with pinned base connections. I am using a damping ratio of 3% for my calculations.
Thanks for the suggestion about the start up time. I will consult the equipment manufacturer to get the time required for...
@ wrxsti Thanks. I can get the dynamic loads from the manufacturer and I will try out your method. However, can you provide reference for the this method. I would like to read through the whole thing.
@ HTURKAK Yes. This is a steel structure. It will be supporting belt conveyors meant for airport baggage handling systems. The vibrations will be caused by the motors running and the bags periodically passing over them. The primary source of the vibrations will be the bags since the motors are...
@saplanti I went through that thread and the issue over there is that the natural frequency of the structure and operating frequency of the machinery are matching which may cause resonance. They are discussing methods for damping so that resonance can be avoided. My issue is different. I have...
I was looking at AISC Design Guide 11 for checking my structures for vibrations. I deal with machinery with constant RPM so as per the categorization in the Design Guide, my case is that of "Harmonic or sinusoidal loads". However, the design guide only deals with vibrations caused by walking or...
