笔者曾在本刊1980年第3期发表过《谈谈钢筋的自然情况》一文。$多年过去了，随着建筑技术和冶炼技术的发展，以及规范标准的修订，钢筋的“自然情况”也发生了很大变化。为了便于识别和表述目前我国钢筋混凝土结构和预应力钢筋混凝土结构中常用钢筋的品种和符号，笔者依据现行 The author has published in the third issue of 1980 issue of “talk about the natural conditions of steel” article. Years passed. With the development of construction technology and smelting technology, and the revision of normative standards, great changes have taken place in the “natural conditions” of steel bars. In order to facilitate the identification and expression of China’s current reinforced concrete structures and prestressed reinforced concrete structures commonly used varieties and symbols, the author based on the existing