Issue Team Recommendations for Wood

1
Issue Team Recommendationsfor Wood CFS

1. Mid-rise light-frame shear wall buildings
2. New soft-story structures
3. New hillside structures
4. New open front structures
5. Light-frame structures with masonry veneer

2
Mid-rise Light-frame Shear Wall
BuildingsPerformance, Design, Detailing
3
Mid-rise Light-frame Shear Wall
BuildingsPerformance, Design, Detailing

• Issues
• Extended into mid-rise construction without
  adequate knowledge of seismic performance
• Is adequate safety provided?
• How do we design for performance?
• What tools are needed for multi-story stacked
  shear wall analysis and design?

4
New Soft-story StructuresReconsider
Irregularity Implications
5
New Soft-story StructuresReconsider
Irregularity Implications

• Issues
• Analysis and shake table testing consistently
  shows that light-frame construction exhibits
  extreme soft story behavior, regardless of design
  to avoid this behavior
• Study is needed to consider what is achieved by
  current code limitations and practical ways to
  approach new building design

6
New Soft-story StructuresReconsider
Irregularity Implications

• Resources
• San Francisco CAPSS/ATC 71-1
• CUREE-Caltech Woodframe Project
• NEESWood Project
• UC Berkeley House Testing
• Others?

7
New Hillside StructuresDesign Recommendations
8
New Hillside StructuresDesign Recommendations

• Issues
• In the Northridge Earthquake, collapses occurred
  in light-frame hillside structures
• A substantial portion of housing inventory is of
  hillside construction
• Current code permits design of hazardous
  buildings

9
New Hillside StructuresDesign Recommendations

• Resources
• Northridge earthquake experience
• City of Los Angeles ordinance
• CUREE-Caltech woodframe project

10
New Open-front Light-frame StructuresDesign
Recommendations
11
New Open-front Light-frame StructuresDesign
Recommendations

• Issue
• Current code permits construction of potentially
  hazardous buildings

12
New Open-front Light-frame StructuresDesign
Recommendations

• Resources
• CUREE-Caltech Woodframe Project
• Analytical study by Jian Xu WSU
• TS7 work from 2003 Provisions

13
New Light-frame Structures with Masonry Veneer
Design Recommendations

• Issues
• Demands on light-frame structure from masonry
  veneer
• Anchorage of veneer to structure
• Resources
• NSF/NEES Project

14
Issue Team Recommendationsfor Wood CFS

1. Mid-rise light-frame shear wall buildings
2. New soft-story structures
3. New hillside structures
4. New open front structures
5. Light-frame structures with masonry veneer