tributary and influence area asce 7-10 - purdue …jliu/courses/ce470/ppt_pdf/ce470... · ce470 lab...
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CE470 Lab 8
Column splices
Live load reduction
Tributary and Influence Area
ASCE 7-10
Lab 8 – Column Design
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Column Splices
Forney Hall Addition (Chemical Engineering)
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Column Splices
Splices every 2 stories; typically
located a few feet
above the floor
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Column Splices
Forney Hall Addition (Chemical Engineering)
Hole in web for lifting column into place Splices may also have web splice plates
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Tributary Area, AT
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Interior Column Tributary Area, AT
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Interior Column Influence Area, AI
AI = AT*KLL
AI = AT*4
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Interior Beam Tributary Area, AT
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Interior Beam Influence Area, AI
AI = AT*KLL
AI = AT*2
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ASCE 7-10 Live Load Reduction
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ASCE 7-10 Live Load Reduction
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Interior Column, Beam KLL Factor
From ASCE7-10 Commentary
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Corner Column KLL Factor From ASCE7-10 Commentary
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ASCE 7-10 Live Load Reduction
Note: see Section 4.8 for reduction in roof live loads
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Lab #8 Column B-2
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Lab #8 Column Design
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Lab #8 Column Design
0.5Lo limit only for design of column section immediately below penthouse
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Lab #7 Column Design
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Try for the lightest W-shapes; note that it is not necessary that BOTH Ag and lower r value satisfy required values based on KL/r assumption.
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