topic 07 concepts and configuration
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Concepts of Seismic Resistant Design
Structural Configuration 1
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Concept of Competent Load Path
Structural Configuration 2
Plan
Elevation
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Which System is Better?
Structural Configuration 3
System A System B
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Overall Strength of System A = System B
Systems Have Same Overall Deformation Capacity
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Which System is Better?
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System A System B
What is the effect of a premature loss of one element?
Structural Configuration 4
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Increase Local Redundancy by Designing Hinge Sequence
Hinge Sequence
Force
Deformation
Structural Configuration 5
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Versus Simultaneous Hinging
Hinge Sequence
Force
Deformation
Structural Configuration 6
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Distributed vs Simultaneous Hinging
Force
Distributed
Simultaneous
Deformation
Structural Configuration 7
Simultaneous: Less apparent overstrength
Less post-yield stability
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Avoid Undesirable Mechanisms
Force
Deformation
Structural Configuration 8
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Structural Configuration 9
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Structural Configuration 10
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Avoid Accidental Mechanisms
Vdesign = 2Mp/L
L Vactual = 2Mp/LL
Masonry Wall
Structural Configuration 11
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Avoid Accidental Mechanisms
Structural Configuration 12
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Avoid Accidental Mechanisms
Structural Configuration 13
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Avoid Situations Where the Loss of One
Element is Catastrophic
Structural Configuration 14
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Avoid Re-entrant Corners
(Or Reinforce Accordingly)
Structurally: Improved
Architecturally Dubious
Structural Configuration 15
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Structural Configuration 16
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Protect Nonstructural Elements
Structural Configuration 17