钢筋的计算截面面积及理论重量.doc

公称直径/mm2不同根数钢筋的计算截面面积/mm2单根钢筋理论重量/(kg/m)123456789628.357851131421701982262550.2226.533.2661001331661992322652990.260850.31011512012523023524024530.3958.252.81061582112643173704234750.4321078.51572363143934715506287070.61712113.122633945256567879190410170.88814153.93084616157699231077123113851.2116201.1402603804100512061407160818091.5818254.55097631017127215261780203622902.0020314.26289411256157018842200251328272,4722380.176011401520190022812661304134212.9825490.998214731964245429453436392744183.8528615.8123218472463307936954310492655424.8332804.2160924133217402148265630643472386.31361017.9203620544072508961077125814391617.99401256.625133770502762837540879610053113109.87钢筋的计算截面面积及理论重量每米板宽内的钢筋截面面积表钢筋间距(mm2)当钢筋直径(mm)为下列数值时的钢筋截面面积(mm2)44.55681012141618202225701802272804047181122161621992872363544885430701275168212262377670104715082053268133934189506865458015719924535362898214141924251331813927475261369014017721831455987312571710223428273491422454541001261591962835037851131153920112545314238014909110114145178257457714102813991828231328563456446212010513316423641965494212831676212126183168409112510112715722640262890512321608203625133041392713097122151217387604870118415471957241729243776140901141402023595618081100143618182244271535061508410613118833552475410261340169620942534327216079991231773144917079621257159019632376306817074941151662964626659061183149718482236288717572911121622874496468801149145417952172280518070881091572794366288551117141417452112272719066841031492654135958101058133916532001258420063809814125139256577010051272157119012454250506479113201314452616804101812571521196330042536594168262377513670848104712671636表4.1.4 混凝土强度设计值强度种类混凝土强度等级C15C20C25C30C35C40C45C50C55C60C65C70C75C80fc7.29.611.914,316.719.121.123.125.327.529.731.833.835.9ft0.911.101.271.431.571.711.801.891.962.042.092.142.182.22表9.2.1 纵向受力钢筋的混凝土保护层最小厚度(mm)环境类别板、墙、壳梁柱C20C25C45C50C20C25C45C50C20C25C45C50一201515302525303030二a-2020-3030-3030b-2520-3530-3530三-3025-4035-4035表11.3.6-1 框架梁纵向受拉钢筋的最小配筋百分率(%) 抗震等级梁中位置支座跨中一级0.4和80ft/fy中的较大值0.3和65ft/fy中的较大值二级0.3和65ft/fy中的较大值0.25和55ft/fy中的较大值三、四级0.25和55ft/fy中的较大值0.2和45ft/fy中的较大值钢筋混凝土板最小配筋量mm2混凝土标号钢筋种类45ft/fy板厚(mm)为下行数值时每米宽范围内最小配筋mm28090100110120130140150160C20ft=1.10HPB2350.2357189212236259283306324354377HRB3350.1650160180200220240260280300320C25ft=1.27HPB2350.2720218245272299326354381408435HRB3350.1905160180200220240260280300320C30ft=1.43HPB2350.3064245276306337368398429460490HRB3350.2145172193215236257279300322343C35ft=1.57HPB2350.33642693033363704044374715