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Analytical Study on Critical Temperature of Bolted Splice Connections



The resistance of bolted splice connections is calculated on the basis of tensile strength obtained from high temperature tensile tests (coupon tests) of steel plates and bolt materials. The strengths of both steel plates and bolt materials over 500℃ are greatly affected by the strain rate applied in the high temperature coupon test. This paper investigates the effect of strain rate applied in high temperature coupon tests on the ultimate tensile strength of steel plates and bolt materials by comparing the test and analysis results of 20 cases. These strain rates eventually have a remarkable relation to the behaviour of the connections in elevated temperatures. Numerical analysis results on the basis of a component-based model using the strengths from high temperature coupon tests under high-strain-rate approximately agreed with the critical temperatures of bolted splice connections obtained from elevated temperature tests.

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