×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Drag Struts and Perforated Shearwalls

Drag Struts and Perforated Shearwalls

Drag Struts and Perforated Shearwalls

(OP)
Would the collector force diagram be the same for a wall that is treated as a perforated shearwall vs. a segmented shear wall?

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Drag Struts and Perforated Shearwalls

Yes, if the length of the collectors are the same.

RE: Drag Struts and Perforated Shearwalls

I vote no. With the perforated shear wall method, shear resistance is applied to the collector between full height piers. That's not the case with the segmented approach. That distinction should result in at least subtly different collector force diagrams in my opinion.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Drag Struts and Perforated Shearwalls

(OP)
I guess my next question would be how to draw the collector force diagram for a perforated shear wall. So far all I have found are examples for segmented shearwalls.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Drag Struts and Perforated Shearwalls

I wasn't able to find any specific examples either. Granted, I didn't look too hard. I think that the rational approach would be to assume a uniform distribution of shear wall resistance across the length of the wall assembly. I very much doubt that's how things shake out in reality given relative stiffnesses of the segments etc. However, I think that's the only model consistent with a shear wall panel with tie downs located only at the far ends of the wall assembly.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Drag Struts and Perforated Shearwalls

(OP)
A uniform distribution would mean the unit shear of the perf. shear wall would match the unit shear distribution of the diaphragm collector, the net unit shear would be zero and hence the collector forces should be zero.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Drag Struts and Perforated Shearwalls

(OP)
I reality it is probably going to be somewhere in between this theoretical "zero" and the values that would be given if it were analyzed as segmented, just not sure how to quantify it.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Drag Struts and Perforated Shearwalls

(OP)
On a similar note what should the collector force diagram for a FTAO shearwall look like, similar situation to the perf. shearwall I would think but slightly different.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

RE: Drag Struts and Perforated Shearwalls

I agree with your last three posts Medeek. In practice, I'm pretty conservative with my collector designs because of precisely the uncertainty that we've been discussing in this thread.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Drag Struts and Perforated Shearwalls

(OP)
I think the conservative thing to do would be to analyze both FTAO and PERF shearwall collector forces as if they were segmented. Problem solved.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources