Experimental Testing and Analysis of a Beam-Column

Connection on Liquefiable Soil

Jalila Elfejji, Dr. Shideh Dashti, Dr. Abbie B. Liel, Juan Carlos OlarteUniversity of Colorado at BoulderUniversity of Wisconsin-Madison

July 26, 2014

Process of Liquefaction

Niigata (2004) Uplifting of ground due to Liquefaction Niigata (1964) Tilting due to Liquefaction

Objective: Design and fabricate prototype beam-column connection of 3-story frame

Complete Beam-Column System Design

Beam-Column Connection Fuse

Pinned Column-Frame Connections

SAP2000 Beam-Column Connection with Fuse

I= 1907.55 mm^4 b=12.29 mm

Parallel Axis10mm

1.6mmd

Parallel Axis Theorem

Moment of Inertia

Deformation Results of Beam-Column System on SAP2000 and OpenSees

SAPBeam-Column

SAPBeam-Column w/Frame

OpenSees

Tip Displacement(mm)

9.66 9.66 9.6

Tip Rotation(rad)

0.046 0.046 0.045

Connection Rotation(rad)

0.013 0.013 0.012

Instrumentation of Beam-Column System

Strain Gauge

Linear Variable Differential Transformer

(LVDT)

Expected Moment-Rotation Results and Fuse Damage

source: Soil Dynamics and Earthquake Engineering (2012)

Future Centrifuge Testing

•

Structure

Soil

Ground Motion

Mitigation source: Performance of Buildings on Liquefiable Soils: Evaluation and Mitigation (2013)

Acknowledgments

Many thanks to:

Dr. Shideh Dashti

Dr. Abbie B. Liel

Juan Carlos Olarte

SMART Program Funding: NSF HRD 0639653