鋼筋計(jì)算截面面積及理論重量

1、鋼筋計(jì)算截面面積及理論重量公稱直徑/mm不同根數(shù)鋼筋的計(jì)算截面積/mm²單根鋼筋理論重量/(kg/m123456789628.357851131421701982262550.2226.533.2661001331661992322652990.260850.31011512012523023524024530.3958.252.81061582112643173704234750.4321078.51572363143934715506287070.61712113.122633945256567879190410170.88814153.930846161576992310771

2、23113851.2116201.1402603804100512061407160818091.5818254.55097631017127215271781203622902.0020314.26289421256157018842199251328272.4722380.176011401520190022812661304134212.9825490.998214731964245429453436392744183.8528615.8123218472463307936954310492655424.8332804.2160924133217402148265630643472386

3、.31361017.9203630544072508961077125814391617.99401256.625133770502762837540879610053113109.8750196439285892785698201178413748157121767615.42注：表中直徑d=8.2mm的計(jì)算截面面積及理論重量?jī)H適用于有縱肋的熱處理鋼筋。縱向受力鋼筋的混凝土保護(hù)層最小厚度（mm）（混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范GB50010-2002）環(huán)境類別板、墻、殼梁柱C20C25C45C50C20C25C45C50C20C25C45C50一201515302525303030二a-2020-303

4、0-3030b-2520-3530-3530三-3025-4035-4035注：基礎(chǔ)中的縱向受力鋼筋的混凝土保護(hù)層厚度不應(yīng)小于40mm；當(dāng)午墊層時(shí)不應(yīng)小于70mm；處于一類環(huán)境且由工廠生產(chǎn)的預(yù)制構(gòu)件，當(dāng)混凝土強(qiáng)度等級(jí)不低于C20時(shí)，其保護(hù)層厚度可按本規(guī)定減少5mm，但預(yù)應(yīng)力鋼筋的保護(hù)層厚度不應(yīng)小于15mm；處于二類環(huán)境且由工廠生產(chǎn)的預(yù)制構(gòu)件，當(dāng)表面采取有效保護(hù)措施時(shí)，保護(hù)層厚度可按本表中的一類環(huán)境值取用；預(yù)制鋼筋混凝土受彎構(gòu)件鋼筋端頭的保護(hù)層厚度不用小于10mm；預(yù)制肋形板主肋鋼筋的保護(hù)層厚度應(yīng)按梁的數(shù)值取用。每米板寬各種鋼筋間距時(shí)的鋼筋截面面積（房建結(jié)構(gòu)）鋼筋間距/mm當(dāng)鋼筋直徑/mm為下列

5、數(shù)值時(shí)的鋼筋截面面積/mm²34566/888/101010/121212/141414/161670758085909510010194.388.483.278.574.570.6179167157148140132126281262245231218207196404377354333314298283561514491462437414393719671629592559529503920859805758716678644112110479819248728267851369127711981127106410089581616150814141331125711901131

6、190817801669157114841405133521992053192418111710162015392536236722182088197218681775287226812513236522342116201111012012513014064.258.956.554.450.511410510096.689.71781631571511402572362262182023573273143022814574194023873595855375154954607146546286045618717987667376841028942905870808121411121068102

7、795413991283123211841100161414801420136612681828167616081547143615016017018019020047.144.141.539.237.232.383.878.573.969.866.162.813112311510910398.21891771661571491412622462312182071963353142962792562514294033793583393225234914624364133936395995645325044797547076656285955658908347867427026681026962

8、90685581077011831110104498593488813401257118311171058100522024025026028030032032.129.428.327.225.223.622.157.152.450.248.344.941.939.289.381.978.575.570.166.561.4129118113109101948817816415715114013112322820920119318016815729226825824823021520135732731530228126224543639938336834232029951447145343540

9、4377353607556534514477445417700641616592550513481807740710682634592554914838834773718670628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。鋼筋排成一行時(shí)梁的最小寬度（房建結(jié)構(gòu)）鋼筋直徑/mm3根4根5根6根7根12180/150200/180250/22014180/150200/180250/220300/30016180/180220/200300/250350/300400/35018180/180250/220300/300350/300400/35020200/180250/

10、220300/300350/350400/40022200/180250/250350/300400/350450/40025220/200300/250350/300450/350500/40028250/220350/300400/350450/400550/45032300/250350/300450/400550/450注：斜線以左數(shù)值用于梁的上部，以右數(shù)值用于梁的下部。混凝土強(qiáng)度設(shè)計(jì)值和強(qiáng)度標(biāo)準(zhǔn)值（N/mm²）（混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范GB50010-2002）強(qiáng)度種類符號(hào)混凝土強(qiáng)度等級(jí)C15C20C25C30C35C40C45C50C55C60C65C70C75C80強(qiáng)度標(biāo)準(zhǔn)值

11、10.013.416.720.123.426.829.632.435.538.541.544.547.450.21.271.541.782.012.202.392.512.642.742.852.932.993.053.11強(qiáng)度設(shè)計(jì)值7.29.611.914.316.719.121.123.125.327.529.731.833.835.90.911.101.271.431.571.711.801.892.042.142.092.142.182.22注：（1）計(jì)算現(xiàn)澆鋼筋混凝土軸心受壓及偏心受壓構(gòu)件時(shí)，如截面的長(zhǎng)邊或直徑小于300mm，則表中混凝土的強(qiáng)度設(shè)計(jì)值應(yīng)乘以系數(shù)0.8，當(dāng)構(gòu)件質(zhì)量（如混

12、凝土成型、截面軸線尺寸等）確有保證時(shí)，可不受此限制。（2）離心混凝土的結(jié)構(gòu)強(qiáng)度設(shè)計(jì)值應(yīng)按專門標(biāo)準(zhǔn)取用。混凝土彈性模量 疲勞變形模量（）（混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范GB50010-2002）模量種類混凝土強(qiáng)度等級(jí)C15C20C25C30C35C40C45C50C55C60C65C70C75C802.202.552.803.003.153.253.353.453.553.603.653.703.753.801.11.21.31.41.51.551.61.651.71.751.81.851.9普通鋼筋強(qiáng)度設(shè)計(jì)值（）（混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范GB50010-2002）種 類符號(hào)熱軋鋼筋HPB235（Q253）210210HRB335(20MnSi300300HRB(20MnSiv、20MnSiNb、20MnTi360360RRB400(K20MnSi360360注：在鋼筋混凝土結(jié)構(gòu)中，軸心