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Journal of Structural Engineering / Volume 137 / Issue 12 / TECHNICAL PAPERS

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Experimental Study on Fire Resistance of Building Seismic Rubber Bearings

J. Struct. Eng. 137, 1593 (2011); http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000388 (10 pages)

Bo Wu1, Liwei Han2, Fulin Zhou3, Chaoyong Shen4, and Ping Tan3

1Professor, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou 510640, China (corresponding author). E-mail: bowu@scut.edu.cn
2Former Graduate Student, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou 510640, China. E-mail: han.liwei@mail.scut.edu.cn
3Professor, Earthquake Engineering Research and Test Center, Guangzhou Univ., Guangzhou 510405, China.
4Associate Professor, Earthquake Engineering Research and Test Center, Guangzhou Univ., Guangzhou 510405, China.

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(Submitted 1 August 2010; accepted 20 January 2011; posted ahead of print 22 January 2011)

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.

© 2011 American Society of Civil Engineers

Acknowledgments

The writers want to express their gratitude for the financial support of the National Natural Science Foundation of China (No. 51025829, 90815027), and the Key Research Project of the State Key Laboratory of Subtropical Building Science of China (No. 2008ZA10).

Article Outline

  1. Introduction
  2. Experimental Program
    1. Test Specimens
    2. Test Conditions and Procedures
  3. Fire-Resistance Tests of Uninsulated Rubber Bearings
    1. Visual Observation after Fire
    2. Temperatures
    3. Mechanical Properties
    4. Shear-Dependence Properties
    5. Ultimate Shear Strain
  4. Fire-Resistance Tests of Insulated Rubber Bearings
    1. Fire Insulation
    2. Numerical Modeling
    3. Visual Observation after Fire
    4. Temperatures
    5. Mechanical Properties
    6. Ultimate Shear Strain
  5. Conclusions

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ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000388

PUBLICATION DATA

ISSN

0733-9445 (print)  
1943-541X (online)

Publisher

American Society of Civil Engineers

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