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1
F2012abn
fifteen
design for
lateral loadsLateral Load Design 1
Lecture 15
Applied Architectural Structures
ARCH 631
lecture
APPLIED ARCHITECTURAL STRUCTURES:
STRUCTURAL ANALYSIS AND SYSTEMS
ARCH 631
DR. ANNE NICHOLS
FALL 2013
Lateral Load Design 2
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Lateral Load Resistance
• stability important for any height
• basic mechanisms
– shear walls
– diaphragms
– diagonal bracing
– frame action
• resist any direction laterally without excessive movement
Lateral Load Design 3
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Lateral Load Resistance
• deformations
• load transfer &
in-plane forces
Lateral Load Design 4
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Load Direction
• layout
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Lateral Load Design 5
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Rectangular Buildings
• short side (in red)• needs to resist most wind
• bigger surface area
• shear walls common
• long side• other mechanisms
• long & low• may only need end bracing
• symmetry important
– avoid distortions, ex. twisting
Lateral Load Design 6
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Shear Walls
• resist lateral load in plane with wall
Lateral Load Design 7
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Shear Walls
• lateral
resistance
F2009abn
Shear Walls
• masonry
• concrete
Lateral Load Design 8
Lecture 15
Architectural Structures III
ARCH 631
A
18’
h=15’
H10’ 6’
B C
http:// nisee.berkeley.edu/godden
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Lateral Load Design 9
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Shear Walls
• timber
– wall studs with sheathing
– vertical trusses
Lateral Load Design 10
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Shear Walls
• steel
Lateral Load Design 11
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Shear Walls
• insulated concrete forms (ICF)
Lateral Load Design 12
Lecture 14
Architectural Structures III
ARCH 631
F2007abn
Diaphragms– roof and floor framing and decks
– relative stiffness
– necessary in pin connected beam-column frames with no horizontal resisting elements