THE NASA MARSHALL SPACE FLIGHT CENTER (MSFC) DEVELOPED THE PASSIVE FLUID STRUCTURE COUPLING (FSC) TECHNOLOGY TO EFFICIENTLY CONTROL VIBRATIONS IN THE ARES I LAUNCH VEHICLE. RECENTLY NASA EXPANDED THE EARLY ANALYTICAL AND EXPERIMENTAL RESULTS FROM FSC TO PURELY MECHANICAL SYSTEMS WHICH LED TO A NEW CLASS OF TUNED MASS VIBRATION CONTROL SYSTEM - THE DISRUPTIVE TUNED MASS (DTM). THE ULTIMATE GOAL OF THE PROPOSED RESEARCH PROGRAM IS TO EVALUATE AND DEVELOP NASA S DTM TECHNOLOGY TO MITIGATE DAMAGE OF LARGE CIVIL ENGINEERING STRUCTURES (E.G. BUILDINGS AND BRIDGES) UNDER EXTREME DYNAMIC LOADS DUE TO NATURAL HAZARDS SUCH AS EARTHQUAKES AND WIND. A PROTOTYPE FLUID-BASED DTM SYSTEM WAS RECENTLY DEVELOPED AND MOUNTED IN A VEHICLE TEST FACILITY AT THE MSFC BY NASA ENGINEERS. DURING THESE PRELIMINARY TESTS THE CAPABILITY OF THE DTM SYSTEM TO REDUCE VIBRATIONS OF THE TEST FACILITY WAS CLEARLY DEMONSTRATED. HOWEVER EXCITATIONS APPLIED DURING THESE TESTS DID NOT HAVE TYPICAL CHARACTERISTICS (E.G. TEMPORAL AND SPATIAL) OF DYNAMIC LOADS DUE TO NATURAL HAZARDS. SINCE THEN A MECHANICAL DTM HAS BEEN DEVELOPED JOINTLY BY NASA AND LINC RESEARCH INC. (LINC) FOR USE IN CONTROLLED LABORATORY STUDIES. PRELIMINARY TESTS CONDUCTED USING THE EARTHQUAKE SIMULATOR IN THE LARGE-SCALE STRUCTURES LABORATORY (LSSL) AT THE UNIVERSITY OF ALABAMA (UA) DEMONSTRATED PROMISING RESULTS BUT ALSO UNDERSCORED THE NEED TO BETTER UNDERSTAND THE DYNAMIC RESPONSE OF THE COMPONENTS USED DURING TESTING BEFORE MORE COMPREHENSIVE TESTS ARE PERFORMED. THE OBJECTIVE OF THE PROPOSED RESEARCH IS TO CONDUCT A SERIES OF LARGE-SCALE DYNAMIC TESTS TO INVESTIGATE THE PARAMETERS GOVERNING DYNAMIC BEHAVIOR OF THE DTM DEVELOPED JOINTLY BY NASA AND LINC UNDER EXTREME LOADS PERFORM ANALYTICAL STUDIES USING THIS INFORMATION TO PREDICT ANTICIPATED RESPONSES OF SPECIMENS TO BE TESTED AND CARRY OUT LARGE-SCALE DYNAMIC TESTS OF SPECIMENS REPRESENTING A VARIETY OF POSSIBLE STRUCTURAL SYSTEMS SUBJECTED TO EXTREME EARTHQUAKE AND WIND LOADS. THROUGH CLOSE COLLABORATION WITH NASA ENGINEERS THE PROPOSED RESEARCH WILL FULLY UTILIZE HIGH-SPEED HYDRAULIC ACTUATORS AND THE EARTHQUAKE SIMULATOR IN THE LSSL AT UA AN EXISTING 2-STORY STEEL BUILDING TEST FRAME AND FUTURE SPECIMENS CONSTRUCTED TO SIMULATE OTHER TYPES OF BUILDING SYSTEMS TO INVESTIGATE THE CAPABILITIES OF THE DTM. THE STATE-OF-THE-ART LSSL FACILITY AT UA HAS UNIQUE TESTING CAPABILITIES TO REPRODUCE VARIOUS DYNAMIC LOADING EFFECTS AND PROVIDE THOROUGH DATA COLLECTION WITH ADVANCED SENSING AND DATA ACQUISITION SYSTEMS. THE PROPOSED RESEARCH PROGRAM ADDRESSES ONE OF NASA S STRATEGIC GOALS TO ADVANCE UNDERSTANDING OF EARTH AND DEVELOP TECHNOLOGIES TO IMPROVE THE QUALITY OF LIFE ON OUR HOME PLANET . THROUGH SUCCESSFUL COMPLETION OF THIS PROGRAM COMMUNITIES WORLDWIDE WILL BENEFIT FROM THE TRANSFORMATIVE DTM TECHNOLOGY IN THE BATTLE AGAINST NATURAL HAZARDS. THE ASSOCIATED SOCIETAL AND ECONOMIC IMPACTS ARE FAR-REACHING.