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双钢筋是奥地利的一项专利技术。我国冶金部建筑研究院曾于1974年以奥方提供的双钢筋样品做了四根小梁试验,效果良好。1976年,浙江省建研所首先开始研制双钢筋焊机,1978～1979年,上海、北京、四川、天津、陕西、黑龙江等省市也相继开展了双钢筋技术的试验研究。1980年,原国家建工总局科技局召集了八个单位组成双钢筋技术科研专题协作组,制订了统一的攻关计划,重点研制双钢筋焊机和研究双钢筋混凝土构件的工作性能。三年来,专题组系统地开展了研
Double rebar is a patented technology from Austria. China’s Ministry of Metallurgical Construction Research Institute had done four trabecular tests with double-rebar samples provided by Austria in 1974, and the results were good. In 1976, Zhejiang Institute of Construction began to develop dual-bar rebar welders. From 1978 to 1979, Shanghai, Beijing, Sichuan, Tianjin, Shaanxi, Heilongjiang and other provinces and cities also conducted trials and studies on double-reinforcement technology. In 1980, the State Bureau of Science and Technology of the State Administration of Construction and Industry summoned eight units to form a joint research group of double steel reinforcement technology and developed a unified research plan, focusing on the development of double-bar rebar welders and the study of the performance of double-reinforced concrete components. In the past three years, the special group has systematically conducted research