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

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

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

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 the …

http://nees.org/resources/841

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 the …

http://nees.org/resources/839

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 is …

http://nees.org/resources/837

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 a …

http://nees.org/resources/814

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

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

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 pencil …

http://nees.org/resources/569

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 that …

http://nees.org/resources/574