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    趙金城
    （上海交通大學(xué) 200030）

[提要]  高溫下鋼材力學(xué)性能的確定是進行鋼結(jié)構(gòu)抗火反應(yīng)分析的重要組成部分，為此進行了一系列鋼材高溫材性試驗?；趯υ囼灲Y(jié)果的分析，提出了便于應(yīng)用的鋼材三折線高溫材性模型，為較精確地進行結(jié)構(gòu)火災(zāi)反應(yīng)分析奠定了基礎(chǔ)。
[關(guān)鍵詞]  高溫 鋼材 力學(xué)性能 材性模型

The determihation of mechanical behaviour of structural steel at high temperatures is of particular importance for fire resistant analysis of steel structures. For this reason, a series of tests on the material properties of steel at elevated temperatures are conducted. Based on test results, a trilmear material property model is proposed, it permits the fire response analysis of steel structures to be made more accurately.
Keywords: high temperatures; structural steel; mechanical properties; material property model