Experimental Study on Fire Resistance of Building Seismic Rubber Bearings
Publication: Journal of Structural Engineering
Volume 137, Issue 12
Abstract
Eight building seismic rubber bearings (four uninsulated lead rubber bearings, one insulated lead rubber bearing, two uninsulated natural rubber bearings, and one insulated natural rubber bearing) were experimentally investigated in fire tests following the ISO834 standard heating process. The effects of vertical load and the duration of fire on the failure mode and residual mechanical properties of the rubber bearings were analyzed. The experimental results show that (1) the fire resistance of rubber bearings without insulation fails to exceed 1.5 h; (2) the duration of fire exposure has significant influence on the mechanical-properties degradation of rubber bearings; (3) the effect of vertical load, to which rubber bearings were subjected during the fire, on the residual mechanical properties and fire resistance is inevident; and (4) the proposed insulation is successful in preventing rubber bearings from significant degradation in mechanical properties in fires.
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Acknowledgments
The writers want to express their gratitude for the financial support of the National Natural Science Foundation of China (No. NNSFC51025829, NNSFC90815027), and the Key Research Project of the State Key Laboratory of Subtropical Building Science of China (No. UNSPECIFIED2008ZA10).
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© 2011 American Society of Civil Engineers.
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Received: Aug 1, 2010
Accepted: Jan 20, 2011
Published online: Jan 22, 2011
Published in print: Dec 1, 2011
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