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我国对高强精轧螺纹钢筋的研制是从七十年代后期开始的。为了给这种新型钢筋在工程中开发应用提供必要的配套技术,几年来,我们在上海纺织建筑公司和南京市建筑三公司配合下,陆续在上海、南京、无锡、蚌埠等地后张法预应力混凝土屋架、薄腹梁、框架梁和先张法框架梁等构件中进行了试点应用。现介绍于下。一、精轧螺纹钢筋、连接器与螺帽性能检验精轧螺纹钢筋的机械性能试验结果表明,这种钢筋的机械性能符合技术条件要求。目前国内已有专业厂生产连接器、螺帽与垫板,以商品供应,产品质量较好,成本较低。使用单位也可按连接器、螺帽的技术
The development of high-strength fine-rolled rebars in China began in the late 1970s. In order to provide the necessary supporting technology for the development and application of this new type of steel bar in the project, we have successively worked in Shanghai, Nanjing, Wuxi, Chongqing and other places under the cooperation of Shanghai Textile Construction Company and Nanjing Construction Three Company for several years. The pilot application was carried out in components such as stress concrete truss, thin web girder, frame girder and pretensioned frame girder. Now introduced in the next. First, the performance test of the rolled steel bars, connectors and nuts The test results of the mechanical properties of the finished rolled steel bars indicate that the mechanical properties of the steel bars meet the technical requirements. At present, there are professional factories in China to produce connectors, nuts and backing plates, with the supply of goods, the product quality is better, and the cost is lower. The use of the unit can also be based on connector, nut technology