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  1. Dynamic Collapse of Reinforced Concrete Columns

    08 May 2013 | Publications | Contributor(s): Chiun-lin Wu, Yuan-Sen Yang

    The goal of this project was to study the dynamic collapse mechanism of a low ductility reinforced concrete frame. It completed several RC frame collapse experiments using shake table at NCREE,...

    http://nees.org/resources/6270

  2. Simultaneous Shear and Axial Failures of Reinforced Concrete Columns

    11 May 2011 | Publications | Contributor(s): Santiago Pujol

    Axial failure of columns can lead to collapse of a building. Reinforced concrete columns in buildings constructed before modern seismic design codes were enforced may contain inadequate transverse...

    http://nees.org/resources/2880

  3. Cyclic Response of Concrete Columns Reinforced with High-Strength Steel

    16 Sep 2010 | Publications | Contributor(s): Jeffrey Rautenberg

    In this paper the use high-strength bars (having a yield stress exceeding 80 ksi) as longitudinal reinforcement for columns is reconsidered. The focus of the work presented is on columns meeting...

    http://nees.org/resources/678

  4. Testing and Probabilistic Simulation of Ductile Fracture Initiation in Structural Steel Components and Weldments

    29 Aug 2010 | Publications | Contributor(s): Andrew Myers, Gregory Deierlein, Amit Kanvinde

    Accurate prediction of fracture is critical for ensuring the safety of civil infrastructure, evidenced by damage to buildings and bridges in earthquakes such as the 1994 Northridge Earthquake and...

    http://nees.org/resources/841

  5. Exposed Column Base Connections Subjected to Axial Compression and Flexure

    29 Aug 2010 | Publications | Contributor(s): Ivan Gomez, Gregory Deierlein, Amit Kanvinde

    This report presents results of an experimental study investigating the response of exposed column base connections subjected to axial compression and strong-axis bending. This investigation is...

    http://nees.org/resources/839

  6. Shear Transfer in Exposed Column Base Plates

    29 Aug 2010 | Publications | Contributor(s): Ivan Gomez, Christopher Smith, Gregory Deierlein, Amit Kanvinde

    This report presents the results of an experimental study investigating shear transfer mechanisms of column base plate details. This investigation is the first phase of a broader study whose aim...

    http://nees.org/resources/837

  7. Effect of Longitudinal Reinforcement Ratio on the Failure Mechanism of R/C Columns Most Vulnerable to Collapse

    24 Aug 2010 | Publications | Contributor(s): Adolfo Matamoros

    Models to calculate the drift ratio at axial load failure of reinforced concrete columns such as that proposed by Elwood and Moehle indicate that the drift ratio at axial load failure is primarily...

    http://nees.org/resources/814

  8. Axial Load Failure of Shear Critical Columns Subjected to High Levels of Axial Load

    20 Aug 2010 | Publications | Contributor(s): Adolfo Matamoros, Lisa Matchulat

    This paper discusses the experimental behavior of two lightly reinforced (shear-critical) columns subjected to high levels of axial load and lateral load reversals. The two full-scale experiments...

    http://nees.org/resources/749

  9. Simultaneous Shear and Axial Failures of Reinforced Concrete Columns

    20 Aug 2010 | Publications | Contributor(s): Kurt Henkhaus, Julio Ramirez, Santiago Pujol

    Axial failure of columns can lead to collapse of a buiding. Reinforced concrete columns in buildings constructed before modern seismic design codes were enforced may contain inadequate transverse...

    http://nees.org/resources/747

  10. Feel the Stress

    05 Aug 2010 | Learning Objects

    Working individually or in groups, students explore the concept of stress (compression) through physical experience and math. They discover why it hurts more to poke themselves with mechanical...

    http://nees.org/resources/569

  11. Load It Up!

    05 Aug 2010 | Learning Objects

    Students take a hands-on look at the design of bridge piers (columns). First they brainstorm types of loads that might affect a Colorado bridge. Then they determine the maximum possible load for...

    http://nees.org/resources/574