×
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

Questions about seismic parameters on very soft clay, based on ASCE 7-16

Questions about seismic parameters on very soft clay, based on ASCE 7-16

Questions about seismic parameters on very soft clay, based on ASCE 7-16

(OP)
I'm working on a site in Foster City on very soft Bay Mud, site class E. In running the software to obtain the seismic parameters, I got the message, "null-See Section 11.4.8" for Sms, Sm1, Sds, and Sd1. I don't have a copy of ASCE 7-16. I found a paper on what to do, but it was unclear. Any advice? Can I use ASCE 7-10 and get reasonable results? It's for a two-story house.

RE: Questions about seismic parameters on very soft clay, based on ASCE 7-16

My advice. Forget about trying to make some program work. Do the evaluation manually. Apparently the mud is one step above the properties of water.

RE: Questions about seismic parameters on very soft clay, based on ASCE 7-16

It's been awhile since I've used Seismic Design Map software. Last time I did, USGS Hazard Tool was still up and running. Have you tried this one: https://seismicmaps.org/?

RE: Questions about seismic parameters on very soft clay, based on ASCE 7-16

(OP)
MTNClimber, I used the website you referenced. And two others. They don't work on site class E soils.

I could do it by hand, but the usual procedure is apparently no longer valid for E soils. Otherwise, I would get a result as I do using ASCE 7-10. I need to see Section 11.4.8 in ASCE 7-16, or just use 7-10. But I don't have a copy of ASCE 7-16.

RE: Questions about seismic parameters on very soft clay, based on ASCE 7-16

Looks like you'll have to do a site specific analysis(Link). I don't work in CA so I'm not sure if it's needed for a two-story house. I would presume its not but I'll leave it to you or others to comment on that.

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

eBook - Mastering Tolerances for Machined Parts
When making CNC machined parts, mastering tolerances can be challenging. Are general tolerances good enough? When does it make sense to call out for tighter tolerances? Do you need a better understanding of fits, datums, or GD&T? Learn about these topics and more in Xometry's new e-book. Download Now
eBook – How to Choose the Correct Corrosion Testing Method
When designing a metal component, engineers have to consider how susceptible certain alloys are to corrosion in the final product’s operating environment. In a recent study by NACE (National Association of Corrosion Engineers), it was estimated that the direct and indirect costs of corrosion in the United States is approximately 6.2% of the GDP. In 2016, that cost exceeded $1 trillion dollars for the first time. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close