Post-Tensioned Coupled Shear Wall Systems
Construction of a seismic-resistant reinforced concrete coupled shear wall system where unbonded post-tensioned (PT) RC floor slab construction method is adapted
PBD for Seismic Hazard Mitigation
Lehigh is conducting experiments for developing Performance-based seismic design procedures for buildings with supplemental passive damping systems.
Welcome to NEES@Lehigh
The US National Science Foundation has established the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) as a national, networked collaboration of geographically-distributed, shared-use experimental research equipment sites. Each site has telepresence and teleoperation capabilities, computer models and physical test specimens, which will transform the environment for earthquake engineering. NEES@Lehigh is an equipment site specializing in real-time multi-directional (RTMD) testing for earthquake simulation of large-scale structural systems.
The Lehigh University RTMD facility located in the ATLSS Research Center (IMBT Laboratory) allows for real-time multi-directional hybrid seismic testing, combined with real-time analytical simulations, to investigate the seismic behavior of large-scale structural components, structural sub assemblages, and super assemblages (systems). This is achieved through the combined use of dynamic actuators, reaction wall, strong floor and high performance computing. This facility is also designed to support multi-site distributed hybrid testing methods where the substructures involved are at different geographic locations connected by the NEES network.
News and Events
2013 REU Schedule Posted
Monday, June 3, 2013
The 2013 REU Schedule has been posted.
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TechGYRLS Tour ATLSS lab
Tuesday, May 28, 2013
The next generation of female engineers and architects put their skills to the test Friday. The Bethlehem TECHgyrls visited the lab at Lehigh University. They’re part of an after-school program that aims to get girls excited about science, math and technology. After the TECHgyrls toured the lab, they got to conduct their own experiment using marshmallows and gumdrops.
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RTHS being performed this week
Thursday, February 21, 2013
RTHS of a Large-scale Steel Structure with Nonlinear Viscous Dampers will take place February 21 – 22, 2013 between 1 and 4 pm EST. The RTHS test matrix includes conducting a series of simulations using an ensemble of 13 earthquake records at the design basis earthquake (DBE) level.
[Read full article]Project Spotlight
Real-time Hybrid Simulations of a Large-scale Steel Structure with Nonlinear Viscous Dampers
NEES@Lehigh is current conducting Real-Time Hybrid Simulations of the MRF-DBF system, configured with viscous dampers. Read more for video highlights.
[View project page]Seismic Hazard Mitigation using Passive Damper Systems
NEES@Lehigh is current conducting tests using elastomeric dampers. The vision for the project is a validated multi-level, probabilistic, performance-based seismic design procedure for buildings with supplemental passive damping systems. The performance-based design procedure will be used to produce several design cases for each prototype building, by varying the strength of the steel frames and the [...]
[View project page]MR Damper Projects
In 2010, NEES@Lehigh continued to evaluate the Semi-active Magneto Rheological (MR) Damping systems for NEES and commercial projects through Purdue University, the University of Connecticut and ConnDOT. Currently, NEES@Lehigh is continuing to test these devices under Hybrid Testing scenarios.
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