常用建筑钢材建筑材料与检测技术.pptx

常用建筑钢材浙江同济科技职业学院主讲人：厉莎建筑材料与检测技术

教学目标1热轧钢筋2冷轧带肋钢筋3预应力混凝土用钢棒4HotrolledsteelbarColdrolledribbedsteelbarTeachinggoalsSteelrodsforprestressedconcrete目录预应力混凝土用钢丝和钢绞线5型钢6钢板7钢管8StructuralsteelSteelplatelSteelwireandsteelstrandingareusedforprestressedconcreteSteelpipe

1.教学目标Theteachinggoal工作回顾教学目标12掌握常用建筑钢材的品种、牌号及主要技术性能。Masterthecommonconstructionsteelvarieties,gradesandmaintechnicalperformance.了解常用建筑钢材的特性。Understandthecharacteristicsofcommonconstructionsteels.Teachinggoals3会根据工程特点合理选用常用建筑钢材。Accordingtothecharacteristicsoftheprojectreasonableselectionofcommonconstructionsteel.

2热轧钢筋Hotrolledsteelbar2.1热轧光圆钢筋Hotrolledroundsteelbar用加热钢坯轧成的条型成品钢筋，称为热轧钢筋。它是建筑工程中用量最大的钢材品种之一，主要用于钢筋混凝土的配筋。热轧钢筋按表面形状分为热轧光圆钢筋和热轧带肋钢筋。Thefinishedsteelbarrolledbyheatingbilletiscalledhotrolledsteelbar.Itisoneofthesteelvarietieswiththelargestamountinconstructionengineering,mainlyusedforreinforcingreinforcementofreinforcedconcrete.Hotrolledsteelbarisdividedintohotrolledroundsteelbarandhotrolledribbedsteelbaraccordingtothesurfaceshape.经热轧成型，横截面通常为圆形，表面光滑的成品钢筋，称为热轧光圆钢筋（HPB）。其牌号由HPB和屈服强度特征值构成。有HPB300一个牌号。Thefinishedsteelbar,whichishotrolledandusuallyhasaroundcrosssectionandsmoothsurface,iscalledhotrolledsmoothroundsteelbar(HPB).ItsgradeiscomposedofHPBandyieldstrengtheigenvalues.ThereisabrandHPB300.热轧光圆钢筋

2热轧钢筋Hotrolledsteelbar热轧光圆钢筋钢筋的下屈服强度、抗拉强度、断后伸长率、最大拉力总伸长率等力学性能特征值应符合表应符合下表（GB1499.1-2017）2.1热轧光圆钢筋HotrolledroundsteelbarThecharacteristicvaluesofmechanicalpropertiessuchasloweryieldstrength,tensilestrength,elongationafterfracture,andtotalelongationatmaximumtensionofhotrolledroundsteelbarshallconformtothetablebelow牌号Brand下屈服强度LoweryieldstrengthReL（MPa）抗拉强度TensilestrengthRm（MPa）断后伸长率断后伸长率ElongationafterfractureA（%）最大拉力总伸长率TotalelongationatmaximumtensionAgt（%）冷弯试验Coldbendingtest180°d—弯芯直径Bending