October 01, 2009

The goal of this research is to generate the knowledge needed to increase the seismic safety of buildings that use lightweight cold-formed steel (CFS) for the primary beams and columns, and enable engineers to account for complete building performance...

nees.org/warehouse/project/921

November 01, 2010

This project investigates the feasibility of a new structural system for seismic regions, i.e., a seismic-resistant reinforced concrete (RC) coupled shear wall system where the widely-used, unbonded post-tensioned (PT) RC floor slab construction method...

nees.org/warehouse/project/922

May 01, 2007

This website includes a report on a NEES payload shake table test of an equipment isolation system. The report includes: sensor configuration, channel tags, time steps, units, time history plots, matlab functions for parsing the recorded test data,...

nees.org/warehouse/project/923

September 01, 2009

During the last forty years, solitary waves have been used as surrogate leading tsunami waves in laboratory studies. The data taken from the 2004 Indian Ocean tsunamis, however, show that the length and time scales for the solitary wave are too small...

nees.org/warehouse/project/924

January 01, 2011

In the last few years, interest has been increasingly focused on alternative and renewable sources of energy. Wind energy as an alternative to fossil fuels is receiving close attention while the number megawatts produced has been rapidly increasing....

nees.org/warehouse/project/925

October 10, 2008

The project team will evaluate the efficacy of a new class of innovative systems with recentering and/or high damping capabilities, and develop a framework for their design and implementation to retrofit reinforced concrete (RC) buildings to improve...

nees.org/warehouse/project/928

July 01, 2010

This project brings together the technical expertise and advanced testing capabilities of a group of researchers from the US and Turkey to provide unique data on behavior and performance of older reinforced concrete buildings. This type of construction...

nees.org/warehouse/project/929

October 01, 2010

As early as 1970, the structural engineering and building safety community recognized that a large number of two-, three- and even some four-story wood frame buildings designed with the first floor used either for parking or commercial space were built...

nees.org/warehouse/project/934

October 01, 2010

The dynamic response and performance of earth retaining structures has traditionally been measured by testing small physical models, which have yielded valuable information but represent a compromise with respect to field structures. What is needed for...

nees.org/warehouse/project/936

August 15, 2009

This project utilized NEES equipment from the University of California, Los Angeles and the experimental field-test setup from the NEESR-SG project entitled "Understanding and Improving the Seismic Behavior of Pile Foundations in Soft Clays" (Award #...

nees.org/warehouse/project/940

March 17, 2010

Between March 13th and 28th 2010, a team of U.S. researchers, professionals, and local collaborators instrumented four reinforced concrete buildings in Santiago, Chile, to measure aftershock response data following the Feb 27, 2010 MW 8.8 earthquake....

nees.org/warehouse/project/941

June 08, 2009

The objective of this research project is to improve our understanding of, and predictive capabilities for, tsunami-driven debris impact forces on structures. Of special interest are shipping containers, which are virtually everywhere and which will...

nees.org/warehouse/project/942

September 23, 2010

This award is an outcome of the NSF 09-524 program solicitation "George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Research (NEESR)" competition and includes Iowa State University (ISU) as well as two University of Minnesota campuses...

nees.org/warehouse/project/946

October 01, 2009

The goal of this research is to advance seismic safety and design of building structures by studying two steel truss systems: special truss moment frames (STMFs) and staggered truss frames (STFs). Due to their ability to achieve large column-free floor...

nees.org/warehouse/project/947

October 01, 2008

New tools for data visualization and analysis are needed to take full advantage of the density of test data being collected in NEESR projects. These tools should have similar functionalities as post-processors for viewing and interpreting the results...

nees.org/warehouse/project/951

October 01, 2008

Pile foundations are an integral part of many civil engineering structures. The seismic behavior of pile foundations is a very complex problem with interactions between soils (solid skeleton, pore water, and pore air), piles, and superstructure. This...

nees.org/warehouse/project/952

October 13, 2010

Microbial induced calcite precipitation (MICP), a novel bio-mediated ground improvement method, was explored to mitigate liquefaction-prone soils. Geotechnical centrifuge tests were used to evaluate cementation integrity and the response of MICP cemented...

nees.org/warehouse/project/953

October 01, 2009

The destructive power of a tsunami on the world's coastlines is unquestioned; ample evidence can be seen in photos of the aftermath of the 2004 Indian Ocean tsunami. The scale of destruction, however, has perhaps inadvertently justified the study of...

nees.org/warehouse/project/954

August 15, 2009

All data for this project can be found at http://nees.org/warehouse/project/663, the Housesmash project. Since this was a payload project, collected data is intermingled with the primary project data. Please refer to project 663 URL provided above...

nees.org/warehouse/project/955

October 01, 2008

Site liquefaction during earthquake excitations is often associated with significant permanent displacement and lateral spreading that lead to costly damage to civil systems of all types. However, realtime field measurements of permanent displacements...

nees.org/warehouse/project/956

September 16, 2009

Soil liquefaction is an important seismic hazard that has caused extensive damage to buildings, bridges, dams, wharves, and lifelines in past earthquakes. It has caused buildings to sink into the ground, bridges and dams to collapse, and buried tanks...

nees.org/warehouse/project/957

January 01, 2010

Worldwide, seismically induced rock-slope failures have been responsible for approximately 30% of the most significant landslide catastrophes of the past century. They are among the most common, dangerous, and still today, least understood of all seismic...

nees.org/warehouse/project/958

July 03, 2009

There are hundreds of miles of retaining wall systems that exist in the western United States. Their routine design for static applications has been practiced by many public and private sectors. However, seismic design of these retaining walls has...

nees.org/warehouse/project/960

October 22, 2010

The overall goal of these experiments is to provide high-resolution images of the sediment structure and faults in the Arkansas portion of the New Madrid seismic zone and the Puget Sound region, Washington. These data will provide key constraints on...

nees.org/warehouse/project/962

September 01, 2007

A technique for measuring the evolution of shear strength of liquefiable soils in physical models as earthquake-induced pore pressures change is desirable. It was envisioned that the shear strength of liquefying sands can be measured in-flight in a seismic...

nees.org/warehouse/project/963