I just got some text ouput files, and the shear wall design section looks like this:
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SkyCiv_4-8-25 Wall Bracing Design 4/ 7/25 7:29am...
I've a got client that does CFS Metal buildings (self-storage warehouses) that wants me to double check the calculations coming out of his software. He assures me that his quoting / engineering software called MBS allows for metal sheating to be used as a shear wall without bottom track. In my...
Found out where I was mistaken:
The difference between the first and second example is how where we are the on the moment-curvature curve. The first example is way further along, where the concrete has become non-linear, so the neutral axis has somewhat receded from it's elastic value.
As long...
I'm having a look at some formula I use all the time and wondering why two things I'm calling the neutral axis appear to be different things. Or maybe there's a simplification that we're doing that I don't quite understand.
In the first example, we are looking at strain, then stress, then...
I've been using CSI SAFE and other software that allows the integration of design moments along a strip of a fixed width for my two-way slab design for over 10 years. Someone has asked me today what theory / reference this practice is based on, and to my surprise I was not able to find anything...
I've used stud rails before and it was a good experience, though maybe a bit expensive. Does anyone have any experience specifying stirrups as punching shear reinforcement above columns? I know the both ACI and CSA standards allow it, but I'm wondering if it the additional bars make the column...
The last time I had a look was about 10 years ago, external FRP reinforcement was next to useless because of the fire requirements in buildings (from memory, for flexure some percentage of service level loads needed to be maintained while ignoring the FRP reinforcement, which did not allow for...
Friend sent me this one, not sure what to make of it. Anyone know what kind of product this might be? Or are the anchor rods cut flush to the top of the nuts? I believe this is a new pedestrian bridge in Ottawa, Canada.
I've come across a simple (almost shameful) question that has me stumped. The initial question is whether we should "offset" all of the beams in our FEA models of steel structures so that the top of the beams all is level, which is how it's going to be in practice. I've never done this, but...
@matty54 At my last job I was lucky enough to have the support and respect of the big boss, which was crucial, but that did not translate into having support from anyone else in the business. Getting "regular" people on-board with trying to get things better organised and approved was my long...
I guess something that's not discussed often is how hiring an engineer is a double edged sword for businesses. Sure, you can get better insight into how things work and get things approved, but it's by no means a simple or easy process. It will take time and effort, and you will lose some of the...
@matty54
I've found myself in your situation at my last job, and I was thankful that I had some experience under my belt. Being less experienced would probably have lead me to take on work that I was not prepared for and would have lead me down a road of problematic ethics. There are some jobs...
Trying to explain this to someone else, I found out there is a gap in my knowledge. I can't find any information about it in SAFE documentation, but it's really a quite simple question. When beams are modelled in SAFE, there must be an area where the beam and the slab are overlapping? How does...
Following up on this thread: https://www.eng-tips.com/viewthread.cfm?qid=450445
It's my understanding that 4.1.8.11.3) d) v) allows us to use a larger period specifically to check seismic deflections. This means I'll have a different base shear than my regular elastic analysis, so I always run a...
@Celt83 I'm not sure I understand how the Gauss points relate to all of this yet (where are gauss points in the original pages that I posted? Is it complexity that is brushed over?), but this makes sense with the results that I'm seeing. If I consider the lever arm for the moment to be from the...
