Webinar instructions will be emailed before the date of the webinar.

Please log into the webinar 15 – 30 minutes before start time.

Thursday, December 15, 2022
9:00 – 11:00 am CST


Presented by
Seda Gokyer Erbis, Ph.D.

Mechanics of slope movements under dynamic force
Modeling of seismic loading
• Earthquake time histories as input seismic loading
• Input time history selection
Types of analysis for seismic stability of slopes
• Limit equilibrium analysis
– Concept of pseudo-static load case
– Concept of sliding block analysis
– Concept of post-earthquake load case
• Finite element analysis
– Soil constitutive models for liquefaction or cyclic softening
Soil parameter selection for different types of analysis
• Limit equilibrium analysis
• Finite element analysis
Case studies


Webinar Instructions
All attendees must log-on through their own email – attendees may not watch together if they wish to earn continuing education credit. HalfMoon Education Inc. must be able to prove attendance if either the attendee or HalfMoon Education Inc. is audited.

Certificates of completion can be downloaded in PDF form upon passing a short quiz. A link to the quiz will be sent to each qualifying attendee immediately after the webinar. The certificate can be downloaded from the Results page of the quiz upon scoring 80% or higher.

Webinars are presented via GoToWebinar, an easy-to-use application that can be run on most systems and tablets. Instructions and login information will be provided in an email sent close to the date of the webinar. It is highly recommended that you download, install and test the application before the webinar begins by clicking on the link in the email.

GoToWebinar App requirements:
Windows 7 – 10 or Mac OSX Mavericks (10.9) – macOS Catalina (10.15)

Web Browser:
The two most recent version of the following browsers:
Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge
Internet Explorer v11 (or later) with Flash enabled

Internet connection: Minimum of 1Mbps       Hardware: 2GB RAM or more

For more information, visit the Support section at


Professional Engineers:
2.0 PDHs

2.0 HSW CE Hours

Landscape Architects:
2.0 HSW CE Hours

International Code Council:
.2 CEUs (Sitework)


Continuing Education Credit Information
This webinar is open to the public and is designed to qualify for 2.0 PDHs for professional engineers, 2.0 HSW continuing education hours for licensed architects, and 2.0 HSW continuing education hours for landscape architects in all states that allow this learning method. Please refer to specific state rules to determine eligibility.

HalfMoon Education is an approved continuing education sponsor for engineers in Florida (Provider No. 0004647), Indiana (License No. CE21700059), Maryland, New Jersey (Approval No. 24GP00000700) and North Carolina (S-0130). HalfMoon Education is deemed an approved continuing education sponsor for New York engineers and architects via its registration with the American Institute of Architects Continuing Education System (Regulations of the Commissioner §68.14(i)(2) and §69.6(i)(2)). Other states do not preapprove continuing education providers or courses.

The American Institute of Architects Continuing Education System has approved this course for 2.0 LU|HSWs (Sponsor No. J885). Only full participation is reportable to the AIA/CES.

The Landscape Architecture Continuing Education System has approved this course for 2.0 HSW PDHs. Only full participation is reportable to the LA CES.

The International Code Council has approved this event for .2 CEUs in the specialty area of Sitework (Preferred Provider No. 1232).

Attendance will be monitored, and attendance certificates will be available after the webinar for those who attend the entire course and score a minimum 80% on the quiz that follows the course (multiple attempts allowed).


Seda Gokyer Erbis, Ph.D.

Project Manager at Geocomp Consulting

Dr. Gokyer Erbis is a geotechnical engineer with 10 years of experience in research, development, and consulting in geotechnical earthquake engineering. She has been leading the technical efforts for one of Geocomp’s largest consulting projects on seismic assessment of coal ash impoundments. She has worked on various research and consulting projects that involved advanced field and laboratory testing for soil characterization. These projects include undrained behavior of coal combustion residuals, soil liquefaction and post-liquefaction behavior under different test conditions: cyclic triaxial, unidirectional and bidirectional direct simple shear, inducing partial saturation for liquefaction mitigation. She also has background in seismic instrumentation and numerical modeling. She has experience in using software tools to assess slope stability (GeoStudio), to conduct site response analysis (ProShake, DeepSoil), to analyze soil structure interaction (PYWall, Group), to model flow and transport in saturated/unsaturated porous media (SUTRA). She has authored and co-authored several publications in peer reviewed ASCE and ASTM journals and conference proceedings.

AIA Info

AIA Provider Statement:

HalfMoon Education Inc. is a registered provider of AIA-approved continuing education under Provider Number J885. All registered AIA/CES Providers must comply with the AIA Standards for Continuing Education Programs. Any questions or concerns about this provider of learning program may be sent to AIA/CES ( or (800) AIA 3837, Option 3).

This learning program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

AIA continuing education credit has been reviewed and approved by AIA/CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.

Course Title: Seismic Assessment of Slopes

Delivery Method: Live Online

Course Description: This two-hour course for design professionals explains the mechanics of slope movements under dynamic forces, modeling of seismic loading, types of analyses for seismic stability of slopes, soil parameter selection, and reviews relevant case studies to assist design professionals in the seismic assessment of slopes.

Learning Objectives:

Learning Objective 1:
Learners will be able to discuss the mechanics of slope movements under dynamic force and the modeling of seismic loading.

Learning Objective 2:
Learners will be able to identify and differentiate between the types of analyses for seismic stability of slopes: limit equilibrium analysis and finite element analysis.

Learning Objective 3:
Learners will be able to review the concepts of pseudo-static load case, sliding block analysis, and post-earthquake load case.

Learning Objective 4:
Learners will be able to understand the soil parameter selection for the different types of analyses and review relevant case studies.

LUs: 2.0                                                                                           LU Type: LU|HSWs.

Prerequisites: Familiarity with soil mechanics

Advance Preparation: None

Program Level: Intermediate

Course Expiration Date: 10/05/2025

Complaint Resolution Policy:

Complaints regarding this course can be emailed to or by calling (715) 835-5900. A HalfMoon Education representative will respond within 72 hours to resolve the complaint, which will include, but not limited to, access to another CE activity at no or reduced cost or a full or partial refund. Each instance will be resolved on a case-by-case situation.

Streamable MP4/PDF Price: $119.00