315.85 in/sec 573.77 in/sec 971.46 in/sec 0.18 in. 0.33 in. 0.84 in.
2014 Undergraduate Seismic Design Competition
CAL POLY
SAN LUIS OBISPO
CONCEPT
APPROACH and DESIGN Efficiency and cost-effectiveness are the main aspects prioritized in this year’s building design. To create a visually enticing building that satisfies the goal of profitability, our proposed building incorporates a dynamic silhouette produced by varying floor shapes. The chevron bracing system in the building creates a simple aesthetic while drawing attention to the height of the building and establishing an iconic presence.
STRUCTURAL SYSTEM CHEVRON BRACING SYSTEM RIGID DIAPHRAGMS STRONG WEIGHT ANCHORS
FABRICATION TOOLS five major steps toward improvement Laser Cutter
Building 1
Building 2
Building 3
What is ambient vibration testing? Ambient vibration testing is a method that utilizes accelerometers and ambient room noise to find a building’s natural frequency. Acceleration values are plotted against their relative frequencies; drastic peaks in the plot correspond to building modes. Using spectral charts with the extracted frequencies are used to predict the building’s acceleration and displacement during an earthquake.
Magnitude
1st Mode Natural Frequency: 9.9 Hz - 10.1 Hz
Frequency
A SPECIAL THANK YOU TO OUR SPONSORS:
Braced Frame Jig
1 2
pre-fabricated diaphragms, minimal braces floor-by-floor construction with column to column connections
GM1 Spectral acceleration and deflection (2% damping used)
CONSTRUCTION 3 4 5 added braces for greater base shear capacity and lateral stiffness
increased diaphragm rigidity for torsional stability
added secondary braces on bottom levels for higher shear capacity
ANALYSIS
(AMBIENT VIBRATION METHOD)
PREDICTIONS ACCELERATION DEFLECTION GM1 315.85 in/sec 2 GM2 573.77 in/sec GM3 971.46 in/sec2 2
0.18 in. 0.33 in. 0.84 in.
final annual building income
$353,221
CAL POLY
SAN LUIS OBISPO
CONCEPT
APPROACH and DESIGN Efficiency and cost-effectiveness are the main aspects prioritized in this year’s building design. To create a visually enticing building that satisfies the goal of profitability, our proposed building incorporates a dynamic silhouette produced by varying floor shapes. The chevron bracing system in the building creates a simple aesthetic while drawing attention to the height of the building and establishing an iconic presence.
STRUCTURAL SYSTEM CHEVRON BRACING SYSTEM RIGID DIAPHRAGMS STRONG WEIGHT ANCHORS
FABRICATION TOOLS five major steps toward improvement Laser Cutter
Building 1
Building 2
Building 3
What is ambient vibration testing? Ambient vibration testing is a method that utilizes accelerometers and ambient room noise to find a building’s natural frequency. Acceleration values are plotted against their relative frequencies; drastic peaks in the plot correspond to building modes. Using spectral charts with the extracted frequencies are used to predict the building’s acceleration and displacement during an earthquake.
Magnitude
1st Mode Natural Frequency: 9.9 Hz - 10.1 Hz
Frequency
A SPECIAL THANK YOU TO OUR SPONSORS:
Braced Frame Jig
1 2
pre-fabricated diaphragms, minimal braces floor-by-floor construction with column to column connections
GM1 Spectral acceleration and deflection (2% damping used)
CONSTRUCTION 3 4 5 added braces for greater base shear capacity and lateral stiffness
increased diaphragm rigidity for torsional stability
added secondary braces on bottom levels for higher shear capacity
ANALYSIS
(AMBIENT VIBRATION METHOD)
PREDICTIONS ACCELERATION DEFLECTION GM1 315.85 in/sec 2 GM2 573.77 in/sec GM3 971.46 in/sec2 2
0.18 in. 0.33 in. 0.84 in.
final annual building income
$353,221
