1、2.95 纵向受力钢筋混凝土保护层最小厚度mm环境类别板、墙、壳梁、柱、杆柱C20C25C45C50一201525二a30b4035三45注:基础中纵向受力钢筋的混凝土保护层厚度不应小于40mm,当无垫层时不应小于70mm。现浇钢筋混凝土房屋适用最大高度m结构体系抗 震 设 防 烈 度6789框 架 6055框架抗剪墙13012010050抗震墙140部分框支抗震墙80不应采用框架核心筒15070筒中筒180板柱抗震墙1.房屋高度指室外地面到主要屋面板板顶的高度不包括局部突出屋顶部分;2.框架核心筒结构指周边稀柱框架与核心筒组成的结构;3.部分框支抗震墙结构指首层或底部两层框支抗震墙结构;4.
2、乙类建筑可按本地区抗震设防烈度确定适用的最大高度;5.超过表内高度的房屋,应进行专门研究和论证,采取有效的加强措施。钢筋的计算截面面积及公称质量表直径dmm不同根数直径的计算截面面积mm2单根钢筋公称质量kg/m12346.57.112.619.628.333.214.125.139576621.237.75985100 50.37911313335.362.89814116642.475.4118170199 49.588.0137198232 56.5100.5157226265 63.6113.1177254299 0.05550.09860.1540.2220.2608.2101214
3、52.878.5153.9 101106308 151158236339462 201211314452616 251264393565770 302317471679924 3523705507921078 4024226289051232 47570710181385 0.3950.4150.6170.8881.208 161822201.1254.5314.2380.1490.9509760982 60376394211401473 804125715211963 10051272157119012454 12061527188522812945 14071781219926613436
4、 16082036251330413927 18102290282734214418 1.5781.9982.4662.9843.853 283236615.8804.21017.91256.6 12322513 1847241330543770 2463321740725027 3079402150896283 3695482561077540 4310563071258796 49266434814310053 55427238916111310 4.8346.3137.9909.865 每米板宽内的钢筋截面面积表 钢筋间距当钢筋直径mm为以下数值时的钢筋截面面积mm24.57590168
5、126227212199159280262245218196404377353283718670559503112210479828737851616150814141131205319241710153928722681223420113635339331812545448841893927349131425430506847524224380170126545613654544909110125114105978414512712217816413125721720218845741938735933571465460456152410288708087541399128311841100
6、102618281676154714361340231321211957181816962856261824172244209434563168292427152534446240913776350632721601751902007472639994918812311511210910316214929628727926549146244943641339266564659596290688085581077011831149111710581590149714541339196318481795174516532376223621722112200130682887280527272584
7、24542503004264536561651384812671636混凝土板每m最小配筋率配筋面积级钢最小配箍率取0.45ft/fc与0.2%取较大值板厚0.236%0.272%0.306%0.336%189269272306336326367403307354398437408459504425489551605混凝土板每m最小配筋率配筋面积级钢0.2%0.215%172215240258260323360混凝土板每m最小配筋率配筋面积级钢梁 内 钢 筋 排 成 一 排 时的 钢 筋 最 多 根 数梁宽3504004505006007008009001000钢筋5-64-56-77-88-
8、99-1011-1213-1515-1717-1919-217-98-1010-1212-1414-1616-1817-203-49-1111-1314-1715-199-1212-15梁受集中荷载时的附加箍筋附加箍筋承受集中荷载承载力表F kN钢筋级别箍 筋箍 筋 个 数肢数(mm)每侧 1 个(共 2 个)每侧 2 个(共 4 个)每侧 3 个(共 6 个)每侧 4 个(共 8 个)HPB235(级)双23.847.571.395.042.284.4126.7168.966.0131.9197.9263.9190.0285.0380.0129.3258.6387.9517.2四142.52
9、53.3337.8395.8527.8570.0760.0775.81034.5HRB335(级)33.967.9101.8135.760.3120.6181.0241.394.2188.5282.7377.0271.4407.2542.9184.7369.5554.2738.9203.6361.9482.5565.5754.0814.31085.71108.41477.8每根附加吊筋承受集中荷载能力吊筋直径级45o23.333.645.759.775.693.3112.9145.860o28.641.156.073.192.6114.3138.3178.5级48.065.385.3108.0
10、133.3161.3208.358.880.0104.5132.2163.2197.5255.1级57.678.3102.4129.6159.9193.4249.970.495.9125.4158.7195.9237.0306.1梁受集中荷载时的附加吊筋附加吊筋承受集中荷载承载力表F kN级别钢筋直径弯 起 角 度45601 根2 根3 根4 根HPB235 67.2100.8134.482.3123.4164.591.4137.2182.9112.0168.0224.0119.4179.1238.8146.3219.4292.5151.1226.7302.3185.1277.7370.218
11、6.6279.9373.2228.5342.8457.1225.8338.7451.6276.5414.8553.1291.6437.3583.1357.1535.6714.2HRB335 96.0143.9191.9117.5176.3235.1130.6261.2160.0240.0320.0170.6255.9341.2208.9313.4417.9215.9323.9431.8264.5396.7528.9266.6399.9533.1326.5489.7653.0322.6483.8645.1395.0592.6790.1416.5624.8833.0510.1765.21020.3
12、每米箍筋实配面积折算为 I级钢的面积cm2282005.034810020.12102007.8541010031.4281506.741210077.5521015010.46682004820061020023.541020015.76810030.141220038.7761010040.7钢筋混凝土结构构件中纵向受力钢筋的最小配筋百分率%受 力 类 型最小配筋百分率受压构件全部纵向钢筋0.6一侧纵向钢筋0.2受弯构件、偏心构件、轴心受拉构件一侧的受拉钢筋0.2和45ft/fy中的较大值1.受压构件全部纵向钢筋最小配筋百分率,当采用HRB400级、RRB400级钢筋时,应按表中规定减小0
13、.1;当混凝土强度等级为C60及以上时,应按表中规定增大0.1;2.偏心受拉构件中的受压钢筋,应按受压构件一侧纵向钢筋考虑;3.受压构件的全部纵向钢筋和一侧纵向钢筋的配筋率以及轴心受拉构件和小偏心受拉构件一侧受拉钢筋的配筋率应按构件的全截面面积计算;受弯构件、大偏心受拉构件一侧受拉钢筋的配筋率应按全截面面积和扣除压翼缘面积bf-bhf后的截面面积计算;4.当钢筋沿构件截面周遍布置时,“一侧纵向钢筋”系指沿受力方向两个对边中的一边布置的纵向钢筋。框架柱全部纵向受力钢筋最小配筋百分率%类 别抗震等级中柱和边柱1.00.80.7角柱、框支柱1.20.9采用HRB400级热轧钢筋时应允许减少0.1,混
14、凝土强度等级高于C60时应增加0.1。框架梁纵向受拉钢筋的最小配筋白分率%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中的较大值二0.25和55ft/fy中的较大值三、四级柱箍筋加密区的箍筋最小配箍特征值=fc/fw箍 筋 形 式轴 压 比0.30.40.51.05普通箍、复合箍0.100.110.130.150.170.200.23螺旋箍、复合或连续复合矩形螺旋箍0.080.090.180.210.190.220.240.060.070.051.普通箍指单个矩形箍和单个圆形箍;复合箍指矩形、多边形、圆形箍或拉筋组成的箍筋;符合螺旋箍指由螺旋箍与矩形、多边形、圆形箍或拉筋组成的箍筋;连续复合矩形螺旋箍指全部螺旋箍为同一根钢筋加工而成的钢筋;2.框支柱宜采用复合螺旋或井字复合箍,其最小配箍特征值应比表内数值增加0.02,且体积配箍率不应小于1.5%;3.剪跨比不大于2的柱宜采用复合螺旋箍或井字复合箍,其体积配箍率不应小于1.2%,9度时不应小于1.5%;4.计算复合螺旋箍的体积配筋率时,其非螺旋箍的箍筋体积应乘以换算系数0.8。一级抗震框架梁非加密区构造配箍构造配箍率sv=0.3ft/fyv=nAsv/bssv=0.204%
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