CalMemStadFaultCreep.jpg

File information
Description	Note that there is no visible disruption at the left side, as the deformation is spread over a larger area. Major sections of California Memorial Stadium have been offset due to aseismic creep of the Hayward Fault. Image by User:Leonard G. The sections are offset here (on the south end of the stadium) about 1/6 m here (6-7 inches), with the total fault creep estimated at 13 inches since the construction of the stadium 84 years previous to this image. The footings for the supports have not offset, causing the divergence of the columns to appear only at the top, but more visible than otherwise owing to the angle between them. These columns support corresponding ends of stadium seating sections at mid-points, which act as rigid plates. The section to the right is fixed in the foot of the Berkeley hills, while the sections to the left are moving away from the viewpoint and several sections are also rotating clockwise as the extreme left edge is moving north with the alluvial plain extending to San Francisco Bay. In the event of a major fault movement the displacement here could be as much as six feet, with tearing and shaking resulting in the dismantling of the structure. Seismic retrofit modifications are being performed (Fall 2011 through Summer 2014) as part of a major upgrade to the stadium, this involving rebuilding portions upon floating mats (foundations that do not penetrate the surface, rather sitting upon plastic sheets over level graded sand) where they pass over and near the fault, with appropriate sliding connections for the safety of spectators.
Source	Own work
Date	02 October 2006
Author	Leonard_G. (talk) (Uploads)
Permission (Reusing this file)	See below.

Note that there is no visible disruption at the left side, as the deformation is spread over a larger area.

Major sections of California Memorial Stadium have been offset due to aseismic creep of the Hayward Fault. Image by User:Leonard G.

The sections are offset here (on the south end of the stadium) about 1/6 m here (6-7 inches), with the total fault creep estimated at 13 inches since the construction of the stadium 84 years previous to this image. The footings for the supports have not offset, causing the divergence of the columns to appear only at the top, but more visible than otherwise owing to the angle between them.

These columns support corresponding ends of stadium seating sections at mid-points, which act as rigid plates. The section to the right is fixed in the foot of the Berkeley hills, while the sections to the left are moving away from the viewpoint and several sections are also rotating clockwise as the extreme left edge is moving north with the alluvial plain extending to San Francisco Bay.

In the event of a major fault movement the displacement here could be as much as six feet, with tearing and shaking resulting in the dismantling of the structure. Seismic retrofit modifications are being performed (Fall 2011 through Summer 2014) as part of a major upgrade to the stadium, this involving rebuilding portions upon floating mats (foundations that do not penetrate the surface, rather sitting upon plastic sheets over level graded sand) where they pass over and near the fault, with appropriate sliding connections for the safety of spectators.

I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

If this is not legally possible:

I grant any entity the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

File:CalMemStadFaultCreep.jpg

From Wikipedia, the free encyclopedia

File history

File usage

Metadata