MONTHLY DINNER MEETING
Date: Tuesday, November 18, 2003
Location: Steven’s Steak House, 5332 Stevens Place, Commerce,
Time: 5:30 p.m. – 5:30 p.m.-Social Hour; 7:00 p.m.-Dinner; 8:00
Cost: $25 per person with reservations, $30 at the door, $12 for students
Jonathan D. Bray
TITLE: Developing Mitigation Measures for the Hazards
Associated with Earthquake Surface Fault Rupture
Recent earthquakes have reminded the profession of
the devastating Effects of earthquake surface fault rupture on engineered
structures and facilities. Insights from these events are discussed
with special emphasis on describing how ground movements associated
with surface faulting affect structures. Analytical procedures that
can be employed to evaluate the hazards associated with surface faulting
and to develop reasonable mitigation measures are also discussed.
project in Southern California where these procedures were applied is
presented to illustrate the insight gained from sound engineering analysis
of the problem. Similar to other forms of ground failure, such as mining
subsidence, landslides, and lateral spreading, effective design strategies
can be employed to address the hazards associated with surface faulting.
These design measures include establishing non-arbitrary
setbacks based on fault geometry, fault displacement, and the overlying
soil; constructing earth fills, often reinforced with geosynthetics,
to partially absorb underlying ground movements; using slip layers
to decouple ground movements from foundation elements; and designing
strong, ductile foundation elements that can accommodate some level
of deformation without compromising the functionality of the structure.
Read Dr. Bray's paper on fault rupture mitigation
Jonathan D. Bray
is a professor within the Department of Civil Engineering, University
of California, Berkeley. Dr. Bray holds both a Ph. D. and P.E.