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Seismic Design using Structural Dynamics
Speaker: Dr. S. K. Ghosh
PDH earned: 3.0
Tuesday,
July 21st
Part
I: 9:30 to 11:00 am Pacific Time
Part
II: 12:30 to 2:00 pm Pacific Time |
This seminar addresses the methods by
which a designer may comply with the seismic design requirements of
the 2006 International Building Code (IBC)/ASCE 7-05: Equivalent
Lateral Force Procedure (ASCE 7-05 Section 12.8), Modal Response
Spectrum Analysis (ASCE 7-05 Section 12.9), or Seismic Response
History Analysis Procedures (ASCE 7-05 Chapter 16). The
procedures in ASCE 7-05 Section 12.9 and Chapter 16 are more
complicated than the Equivalent Lateral Force Procedure, but are
required to be used under certain conditions of irregularity,
occupancy, and height. Over the years, many questions have
been asked about code provisions concerning these procedures and
this seminar has been created to answer these questions and
demystify the application of the code.
Although ASCE 7-05 (the 2006 and the 2009 IBC) formally recognizes
modal response spectrum analysis as well as seismic response history
analyses, the modal response spectrum analysis is by far the most
common in design office usage and is the primary subject of this
seminar. The background and details are explained in Part I of this
seminar where a step-by-step analysis procedure is introduced, and a
three-story, one-bay frame example is begun to be solved entirely
manually to illustrate application of the procedure.
The manual solution of the three-story,
one-bay frame example is completed in Part II of this seminar, the
remainder of which is devoted exclusively to the detailed design of
a 20-story reinforced concrete shear wall-frame building.
Modal response spectrum analysis is used as the basis of design.
Design utilizing the Equivalent Lateral Force Procedure is also
illustrated because it is basically a prerequisite to design using
the Model Response Spectrum Analysis Procedure. |
