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Instructor: Praveen K. Malhotra, Ph.D., P.E., MASCE

Purpose and Background

Ground motion requirements in ASCE 7 have become quite complex over the years. This has resulted in a lot of confusion and misinterpretation. This two-day virtual workshop will help clarify various issues found when using ASCE 7-16 by working through a case study.

Site-specific ground motions are needed for seismic design of structures. We will will discuss how to generate design ground motions for all possible situations that may be encountered in real life. This workshop is educational as well as practice oriented. Three methods of generating seismic design ground motions will be discussed as per ASCE 7-16:

• General procedure
• Ground motion hazard analysis (GMHA)
• Dynamic site-response analysis

The general procedure is simplest, but in many situations ASCE 7-16 requires a GMHA. In some special situations, a dynamic site response analysis is required by ASCE 7-16. During this workshop, a real-life example will be solved in a step-by-step manner so the attendees can follow the entire procedure. A soft copy of the entire class notes will be provided before the webinar.

Benefits and Learning Outcomes

Upon completion of this course, you will be able to:

• Explain the basis of seismic design ground motion requirements in ASCE 7-16
• Utilize various resources by the ATC, ASCE and the USGS to perform GMHA and dynamic site-response analysis
• Explain pros and cons of different methods of analysis

Participants will:

• Gain a clear understanding of the ASCE 7-16 requirements for site-specific design ground motions
• Understand when to avoid commonly made mistakes in generating the design ground motions
• Obtain clarifications regarding design ground motions
• Be able to utilize various resources by the ATC, ASCE and the USGS

Assessment of Learning Outcomes

Learning objectives are achieved through a case study, demonstrations, discussion, homework, and a short post test.

Who Should Attend?

Geotechnical, structural, civil, architecture, seismology, geology, risk management, building department, regulation, construction, insurance, education

Outline

Day 1

• Response spectrum of ground motion – Geometric-mean and maximum-resultant
• MCER response spectrum, design response spectrum, PGAM, SDS and SD1 using the General
• Procedure in ASCE 7-16
• 2475-year mean return period (MRP) response spectrum for firm-rock as per the USGS
• Magnitude and distance of controlling earthquakes
• 2475-year response spectrum for actual soil condition at the site
• Geometric-mean to maximum-resultant
• Maximum-resultant to risk-targeted
• Probabilistic MCER response spectrum
• Deterministic MCER response spectrum
• Site-specific MCER response spectrum
• Design response spectrum, PGAM, SDS and SD1 using the GMHA

Day 2

• Rock-outcrop ground motion histories for dynamic analysis
• Dynamic analysis of soil profiles
• Spectral ratios from dynamic analysis
• MCER response spectrum of free-surface motion
• Design response spectrum, PGAM, SDS and SD1 from the Site Response Analysis

Intended Audience?

Geotechnical, structural, civil, architecture, seismology, geology, risk management, building department, regulation, construction, insurance, education

How to Earn your CEUs/PDHs and Receive Your Certificate of Completion

This course is worth .4 CEUs/4 PDHs. To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 60 days of the course.