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        徐有鄰
       （中國建筑科學(xué)研究院  北京 100013）

[提要]  我國混凝土結(jié)構(gòu)用鋼筋種類繁多，強(qiáng)度偏低，部分鋼筋延性太差，已難以適應(yīng)混凝土結(jié)構(gòu)發(fā)展的需要?；诨炷两Y(jié)構(gòu)對(duì)受力鋼筋的要求，從強(qiáng)度、延性、質(zhì)量穩(wěn)定性、錨固性能、施工適應(yīng)性及經(jīng)濟(jì)等方面對(duì)現(xiàn)有鋼筋進(jìn)行了分析比較。根據(jù)我國國情及建筑市場(chǎng)的變化，提出了大力推廣強(qiáng)度為400MPa的Ⅲ級(jí)鋼筋，發(fā)展小直徑Ⅱ，Ⅲ級(jí)鋼筋，優(yōu)化或淘汰冷加工鋼筋，發(fā)展與鋼筋有關(guān)的配套技術(shù)等建議?？晒┙ㄖO(shè)計(jì)部門及治金企業(yè)參考。
[關(guān)鍵詞]  混凝土結(jié)構(gòu)  鋼筋  選擇

On the basis of the main requirements of load-bearing reinforcements in concrete structures, an analytical comparsion for strength, ductility, stability of quality, anchoring performance, suitability of construction and economics etc. between existing steel bars has been made. According to the national conditions of our country and the great changes of building construction market at present, some proposals concerning with the popularization of grademsteel bar with strength of 400 MPa, developing the small diameter grade Ⅱ, Ⅲsteel bars, optimizing or eliminating the cold-drawn steel bars and to make further advances on forming a complete set technology for reinforcement of steel bars etc. are also presented.
Keywords:  concrete structure; steel bar; selection