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Real-Time Multi-Directional Equipment Site

As part of the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program, Lehigh University has established the Real-Time Multi-Directional (RTMD) earthquake simulation facility at the ATLSS Engineering Research Center. The RTMD earthquake simulation facility is a next-generation earthquake research facility for seismic performance evaluation of large-scale structural systems. This facility has advanced experimental and analytical simulation capabilities to test and validate complex and comprehensive analytical and computer numerical models, leading to advances in earthquake engineering and experimental methods. The facility features a multi-directional reaction wall, five dynamic actuators, advanced instrumentation, and a tele-participation system consisting of real-time streaming data and video. Hydraulic power for the servo-actuator system is supplied by a system consisting of five pumps and three banks of accumulators that enables strong ground motion effects to be sustained in real-time for up to 30 seconds. Real-time multi-directional seismic testing of large-scale structural components and systems at the RTMD earthquake simulation facility can be performed using either the effective force method, pseudo-dynamic testing method, or the pseudo-dynamic hybrid testing method. Distributed hybrid pseudo-dynamic testing can also be performed using the RTMD facility in conjunction with other laboratory sites.
Additional information on the RTMD Site is available at:

Specific questions regarding the equipment site can be addressed to the following individuals:

Dr. James Ricles, RTMD Site Director and Bruce G. Johnston Professor of Structural Engineering, Lehigh University

Phone: 610-758-6252

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Gary Novak, RTMD Site Operations Manager

Phone: 610-758-5488
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General inquiries regarding the equipment site can be also be addressed to:

Dr. Chad Kusko, ATLSS Administrative Director, ATLSS Engineering Research Center

Phone: 610-758-5299
Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Recent Project

PITA Project: Integrated Framework using Monitoring and Reliability for Improved infrastructure Management under Uncertainty: Phases 1, 2, and 3


The aim of the PITA project is to develop a novel integrated framework using structural health monitoring and reliability technologies for improved bridge management under uncertainty. Through the use of new technologies and the employment of structural health monitoring and reliability approaches, the project is expected to have significant impact on bridge lifetime management practices.


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