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简要介绍了我国新颁布的国家标准GB 50010-2010《混凝土结构设计规范》和水工行业标准DL/T 5057-2009《水工混凝土结构设计规范》及SL 191-2008《水工混凝土结构设计规范》在钢筋的品种和物理力学性能指标的要求等方面所作的重大修改,例如,新规范新增了HPB300级光圆钢筋和HRB500级热轧带肋钢筋钢筋及细晶粒热轧带肋钢筋HRBF335、HRBF400、HRBF500,并增列了在已有牌号后加“E”、适用于抗震结构的钢筋;新增了大直径预应力螺纹钢筋和预应力混凝土用螺旋槽钢棒及螺旋肋钢棒;在钢筋的塑性性能要求方面,GB50010-2010还提出了最大力下总伸长率Agt的限值要求等,值得钢筋选用时予以关注.
This paper briefly introduces China’s newly promulgated national standard GB 50010-2010 Code for Design of Concrete Structures and Standard for Design of Hydraulic Concrete Structures DL / T 5057-2009 and SL 191-2008 Code for Design of Hydraulic Concrete Structures For example, the new code added new HPB300 round bars and HRB500 hot rolled ribbed bars and fine grain hot rolled ribbed bars HRBF335 , HRBF400, HRBF500, and added after the existing grades plus “E” for seismic reinforcement of the structure; added a large diameter prestressed screw steel bars and prestressed concrete spiral grooved bar and spiral ribbed steel Stick; GB50010-2010 also proposed the maximum elongation under the maximum elongation Agt limit requirements, it is worth to pay attention to the selection of steel.