Difference between revisions of "Category:756 Seismic Design"

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m (Wording clarification, add Bridge Seismic Design Process Flowchart, and remove potentially confusing figure with example design features.)
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All new bridges on the state system shall include some level of seismic design and/or detailing to resist earthquakes based upon an expected seismic event for a given return period. For example, in Seismic Performance Categories B, C and D, both design and detailing work is needed because of the increased probability of damaging earthquakes.
 
All new bridges on the state system shall include some level of seismic design and/or detailing to resist earthquakes based upon an expected seismic event for a given return period. For example, in Seismic Performance Categories B, C and D, both design and detailing work is needed because of the increased probability of damaging earthquakes.
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|[[Media:756 Visio-SeismicRetrofitFlow LFD.pdf|Bridge Seismic Design Process Flowchart]]
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|[[Media:756 Visio-SeismicRetrofitFlow LFD.pdf|Bridge Seismic Design Process Flowchart]]
 
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When existing bridges in SPC B, C and D are identified as needing repairs or maintenance, a decision on whether to include seismic retrofitting in the scope of the project should be made based on the location of the bridge, the extent of the rehabilitation work and the expected life of the bridge after the work. For example, if the bridge needs painting or deck patching, no retrofitting is recommended. However, redecking or widening the bridge indicates that MoDOT is planning to keep the bridge in the state system with an expected life of at least 30 more years.  In these instances, the project core team should consider cost effective methods of retrofitting the existing bridge.
 
When existing bridges in SPC B, C and D are identified as needing repairs or maintenance, a decision on whether to include seismic retrofitting in the scope of the project should be made based on the location of the bridge, the extent of the rehabilitation work and the expected life of the bridge after the work. For example, if the bridge needs painting or deck patching, no retrofitting is recommended. However, redecking or widening the bridge indicates that MoDOT is planning to keep the bridge in the state system with an expected life of at least 30 more years.  In these instances, the project core team should consider cost effective methods of retrofitting the existing bridge.
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|-
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|'''Bridge Dampers, Seismic'''
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|-
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|[http://library.modot.mo.gov/RDT/reports/Ri01028/rdt05007.pdf Report 2005]
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|-
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|[http://library.modot.mo.gov/RDT/reports/Ri01028/rdt05007.pdf Summary 2005]
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|-
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|'''Bridge, Cable-Stayed, Seismic'''
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|-
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|[http://library.modot.mo.gov/RDT/reports/Ri05023/or08003.pdf Report 2007]
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|-
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|'''Earthquake Hazard Assessment'''
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|-
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|[http://library.modot.mo.gov/RDT/reports/Ri98043/RDT01009.pdf Report 2001]
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|-
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|[http://library.modot.mo.gov/RDT/reports/Ri98043/Brief.htm Summary 2001]
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|-
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|'''See also:''' [http://www.modot.gov/services/OR/byDate.htm Innovation Library]
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|}

Revision as of 09:46, 7 April 2009

All new bridges on the state system shall include some level of seismic design and/or detailing to resist earthquakes based upon an expected seismic event for a given return period. For example, in Seismic Performance Categories B, C and D, both design and detailing work is needed because of the increased probability of damaging earthquakes.

Bridge Seismic Design Process Flowchart
Seismic Performance Categories
St. Louis Area


 

 

When existing bridges in SPC B, C and D are identified as needing repairs or maintenance, a decision on whether to include seismic retrofitting in the scope of the project should be made based on the location of the bridge, the extent of the rehabilitation work and the expected life of the bridge after the work. For example, if the bridge needs painting or deck patching, no retrofitting is recommended. However, redecking or widening the bridge indicates that MoDOT is planning to keep the bridge in the state system with an expected life of at least 30 more years. In these instances, the project core team should consider cost effective methods of retrofitting the existing bridge.

Bridge Dampers, Seismic
Report 2005
Summary 2005
Bridge, Cable-Stayed, Seismic
Report 2007
Earthquake Hazard Assessment
Report 2001
Summary 2001
See also: Innovation Library