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Steel and Composite Structures
  Volume 2, Number 4, August 2002 , pages 247-258

Experimental studies on the material properties of high-strength bolt connection at elevated temperatures
Guo-Qiang Li, Ying-Zhi Yin and Ming-Fei Li

    The high-temperature material properties of steel are very important to the fire resistance analysis of high-strength bolt connections. This paper reports on the results of the experimental studies on the high-temperature properties of 20 MnTiB steel which is widely used in high-strength bolts, and the frictionrncoefficient of 16Mn steel plates at elevated temperature which is a necessary parameter for bolted frictional connection analysis. The test data includes yield strength, limit strength, modulus of elasticity, elongation and expansion coefficient of 20MnTiB steel at elevated temperature, and the friction coefficients between two 16Mn steel plates under elevated temperatures and after cooling. Based on the data from the tests, the mathematical models for predicting the mechanical properties of 20MnTiB steel and friction coefficients of 16Mn steel plates have been established.
Key Words
    high-strength bolts; material properties; high-temperature; connections; friction coefficients.
Department of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P.R. China

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