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MCEER Bulletin, Volume 21, Number 2, Summer 2007

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Volume 21, Number 2, Summer 2007

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MCEER’s ASHRAE Consortium Investigates Performance of Roof-Top Air Handling Unit

logo partnersMCEER’s ASHRAE Consortium has completed Phase II studies involving shake table tests of a rigidly anchored and vibration isolated roof-top air handling unit. Tests were conducted at the University at Buffalo.

Phase I studies involved shake table tests to evaluate the seismic performance of an isolation/restraint system for heavy equipment, in this case, a large centrifugal chiller. The isolation/restraint system tested was typical of those designed by ASHRAE members. It consists of coil springs and rubber snubbers to constrain displacement in both horizontal and vertical directions.

This work was conducted by Andre Filiatrault and graduate student Saeed Fathali, both of the University at Buffalo. Findings from the Phase I study are presented in an upcoming MCEER technical report (MCEER-07-0007).

Results of both studies help advance MCEER’s program to improve understanding and performance of nonstructural components.

The ASHRAE Consortium comprises members of the American Society of Heating, Refrigerating and Air-Conditioning Engineers’ Technical Committee 2.7, which focuses on fundamental scientific and engineering design principles for seismic and wind restraint design of building mechanical and electrical service systems. MCEER’s ASHRAE Consortium was established in 2004.