1、字母讀音AlphaBBBeta字母讀音NuXiGammaDelteEpsilonOmicronPiRho希臘字母表ZetaEnEtaK K人入ThetaSigma Tau UpsilonIotafaiPhiKappaLambdaMuChiPsiOmega混凝土受壓區等效矩形應力圖系數< C50C55C60C65C70C75C80IJ11.00.990.980.970.960.950.94IS0.80.790.780.770.760.750.74相對界限受壓區高度 I和截面最大抵抗矩系數a訶"混凝土強度等級< C50C60鋼筋強度等級330MPa335MPa400MPa50

2、0MPa330MPa335MPa400MPa500MPa0.5760.5500.5180.4820.5570.5310.4990.4640.4100.3990.3840.3660.4020.3900.3750.356混凝土強度等級C70C80鋼筋強度等級330MPa335MPa400MPa500MPa330MPa335MPa400MPa500MPa匚H0.5370.5120.4810.4470.5180.4930.4630.4290.3930.3810.3650.3470.3840.3710.3560.337混凝土軸心抗壓強度標準值和設計值（）強度一一一一一一混凝土強度等級C15C20C25C

3、30C35C40C45C50C55C60C65C70C75C8010.013.416.720.123.426.829.632.435.538.541.544.547.450.27.29.611.914.316.719.121.123.125.327.529.731.833.835.9混凝土軸心抗拉強度標準值和設計值（）強度混凝土強度等級C15C20C25C30C35C40C45C50C55C60C65C70C75C801.271.541.782.012.202.392.512.642.742.852.932.993.053.11ft0.911.101.271.431.571.711.801.8

4、91.962.042.092.142.182.22混凝土保護層的最小厚度c （mm環境類別板、墻、殼梁、柱、桿-一一1520二 a2025二 b2535三a3040三b4050注：1、混凝土強度等級不大于C25時，表中保護層厚度數值增加 5mm2、鋼筋混凝土基礎宜設置混凝土墊層，基礎中鋼筋的混凝土保護層厚度應從墊層頂面算起，且不應小于40mm普通鋼筋強度設計值（）牌號抗拉強度設計值Jr抗壓強度設計值HPB300 (A)270270HPB335 ( B)300300HRB335( 0、HRBF335( C)> RRB335 ( CT)360360HRB500 ( D)、HRBF500 (

5、D)435435縱向受力鋼筋的最小配筋百分率（%受力類型最小配筋百分率受壓構件全部縱向鋼筋強度等級500MPa0.50強度等級400MPa0.55強度等級300MPa 335MPa0.60一側縱向鋼筋0.20受彎構件、偏心受拉、軸心受拉構件一側的受拉鋼筋p20和中的較大值|注：1、受壓構件全部縱向鋼筋最小配筋百分率，當采用C60以上強度等級的混凝土時，應按表中規定增加 0.10 ；2、板類受彎構件（不包括懸臂板）的受拉鋼筋，當采用強度等級400MPa500MPa勺鋼筋時，其最小配筋百分率應允許采用 0.15 和中的較大值；3、偏心受拉構件中的受壓鋼筋應按受壓構件一側縱向鋼筋考慮；4、受壓構件的

6、全部縱向鋼筋和一側縱向鋼筋的配筋率以及軸心受拉構件和小偏心受拉構件一側的受拉鋼筋的配筋率均應按構件的全截 面面積計算；5、 受彎構件、大偏心受拉構件一側受拉鋼筋的配筋率應按全截面面積扣除受壓翼緣面積卜廠："環后的截面面積計算；6、當鋼筋沿構件截面周邊布置時，“一側縱向鋼筋”系指沿受力方向兩個對邊中一邊布置的縱向鋼筋。鋼筋的公稱直徑、公稱截面面積及理論重量公稱直徑/mm不同根數鋼筋的計算截面積/mm2單根鋼筋理論重量 /（kg/m）123456789628.357851131421701982262550.2226.533.2661001331661992322652990.26085

7、0.31011512012523023524024530.3958.252.81061582112643173704234750.4321078.51572363143934715506287070.61712113.122633945256567879190410170.88814153.93084616157699231077123113851.2116201.1402603804100512061407160818091.5818254.55097631017127215271781203622902.00 (2.11 )20314.262894212561570188421992513

8、28272.4722380.176011401520190022812661304134212.9825490.998214731964245429453436392744183.85(4.10 )28615.8123218472463307936954310492655424.8332804.2160924133217402148265630643472386.31(6.65 )361017.9203630544072508961077125814391617.99401256.625133770502762837540879610053113109.87(10.34)50196439285

9、892785698201178413748157121767615.42(16.28)注：1、表中直徑d=8.2mm的計算截面面積及理論重量僅適用于有縱肋的熱處理鋼筋;2 、括號內為預應力螺紋鋼筋的數值。鋼筋混凝土板每米寬的鋼筋面積表（mm'）鋼筋當鋼筋直徑/mm為下列數值時的鋼筋截面面積/mm2間距/mm34566/888/101010/121212/141414/16167010117928140456171992011211369161619082199253628727594.316726237751467185910471277150817802053236726818088

10、.41572453544916298059811198141416691924221825138583.21482313334625927589241127133115711811208823659078.51402183144375597168721064125714841710197222349574.513220729841452967882610081190140516201868211610070.61261962833935036447859581131133515391775201111064.2114178257357457585714871102812141399161418

11、2812058.9105163236327419537654798942111212831480167612556.5100157226314402515628766905106812321420160813054.496.6151218302387495604737870102711841366154714050.589.714020228135946056168480895411001268143615047.183.813118926233542952363975489010261183134016044.178.5123177246314403491599707834962111012

12、5717041.573.91151662312963794625646657869061044118318039.269.8109157218279358436532628742855985111719037.266.1103149207256339413504595702810934105820032.362.898.2141196251322393479565668770888100522032.157.189.312917822829235743651460770080791424029.452.481.911816420926832739947155664174083825028.35

13、0.278.511315720125831538345353461671083426027.248.375.510915119324830236843551459268277328025.244.970.110114018023028134240447755063471830023.641.966.59413116821526232037744551359267032022.139.261.488123157201245299353417481554628注：表中鋼筋直徑中的6/8，8/10等系指兩種直徑的鋼筋間隔放置。混凝土彈性模量（|）強度等級C15C20C25C30C35C40C45C50C55C60C65C70C75C802.202.55