《【建筑算量】柱板梁钢筋工程量计算教程及实例》由会员分享,可在线阅读,更多相关《【建筑算量】柱板梁钢筋工程量计算教程及实例(36页珍藏版)》请在金锄头文库上搜索。
1、板、柱、梁 钢筋工程计算,【例1】计算钢筋混凝土板的钢筋用量。,解 1. 计算钢筋长度,现浇板砼强度等级C25,保护层厚度C=20mm。 (1)沿长方向钢筋8200 单根钢筋长 1 = 1.31.7620.0226.250.008 = 3.12 (m) 根数 N1=(2.50.240.1) 0.21= 12(根) 钢筋长 L1 = 1 N1 =3.1212 =37.44(m),(2)沿短方向钢筋8200 2 =2.5 0.24 0.0222 6.25 0.008 =2.8(m) N1=(1.31.7630.120.12)0.22 =15(根) L2 =2.815 =42(m) (3)负弯矩筋6
2、 负筋长度=图示平直部分长度 2(板厚2C1.75d) 左右两边负筋长度,单根长3 = 0.40.120.02 2(0.0820.021.750.006) = 0.56(m) 根数N3 =(2.50.240.1)0.212 =24(根) 总长L3= 0.5624 =13.44(m) 上下两边(沿外墙)负筋长度 单根长4= 0.40.240.02 2(0.0820.021.750.006) =0.68(m),根数N4 =(1.31.7630.120.12) 0.222 =15(根)2 =30(根) 总长L4= 0.6830= 20.4(m) 中间小肋梁 (2 2断面)负筋长度 单根长5= 0.4
3、20.12 2(0.0820.021.750.006) = 0.98(m) 根数N5=(2.50.240.1)0.21=12(根) 总长L5= 0.9812 =11.76(m), 按需要,对负筋增设发布筋6400 总长度L6=(2.50.24)7 (1.31.760.24)4 =27.1(m) (4)断面22肋梁 414钢筋总长 L7 =(3.060.022 26.250.014) 4 =12.78(m) 箍筋6200 8 =0.24 48 0.0318 0.006 =0.828(m),N8 =(3.0630.1220.1)0.22 = 15(根) 总长L8 =0.82815=12.42(m)
4、 (5)断面22肋梁 (120240) 412钢筋总长 L9 =(2.50.240.0226.2520.012) 4 =11.4(m), 箍筋6200 10 =(0.120.24)280.03180.006 = 0.588(m) N10=(2.50.2420.05)0.21=12(根) L10= 0.58812=7.06(m),2. 钢筋消耗量,【例2】图为某三层现浇框架柱 (砼C25)立面和断面配筋图,底 层柱断面尺寸为350350,纵向 受力钢筋 422(螺纹钢),受力钢筋下端与柱基插筋搭接,搭接长度800mm。与柱正交的是“”形整 体现浇梁,试计算该柱钢筋工程量。,解 1.计算钢筋长度(
5、C=30mm) (1)底层纵向受力筋22(级钢筋) 每根筋长l1= 3.070.50.8 = 4.37(m) 总长L1 = 4.374 = 17.48 (m) (2)二层纵向受力筋22 (级钢筋) 每根筋长l2 = 3.20.6 = 3.8(m) 总长L2 = 3.84 = 15.2(m),(3)三层纵筋16(级钢筋) 每根筋长l3 = 3.20.03 = 3.17(m) 总长L3 = 3.174 = 12.68(m) (4)柱基插筋22 (级钢筋) 每根筋长l4 = 0.8+1.5+0.20.04 = 2.46(m) 总长L4 = 2.464 = 9.84(m),(5)箍筋6,按03G101
6、-1,考虑135弯钩 二层楼面以下,单根箍筋长 lg1 = 0.35480.03180.006 = 1.268 (m) 箍筋根数 Ng1 = 0.8/0.11(3.070.80.5)/0.2 = 914 = 23 (根) 总长 Lg1 = 1.26823 = 29.16 (m), 二层楼面至三层楼顶面,单根箍筋长 lg2 = 0.25480.03180.006 = 0.868 (m) 箍筋根数 Ng2 = (0.80.6)0.1 (3.220.80.60.03) 0.2 = 1425 = 39 (根) 总长Lg2= 0.86839=33.85 (m) 箍筋总长度 Lg = Lg1Lg2 = 2
7、9.1633.85 = 63.01(m),2. 钢筋图纸用量 22 =(17.4815.29.84)2.984 = 126.88 (kg) 16 = 12.681.578 = 20.01 (kg) 6 = 63.010.222 = 13.99 (kg),【例3】计算某办公楼二根框架梁KL1的钢筋工程量。建筑按四级抗震设计,砼强度等级为C25,柱截面尺寸:KZ1 450mm450mm,KZ2 400mm400mm。,解砼为C25,则柱保护层C=30mm,梁保护层C = 25mm,钢筋采用HRB335,抗震等级四,lae = la = 34d,搭接长度为1.234d。 (1)受力纵筋 梁上部纵筋2
8、20 钢筋长度超过8m时,考虑一个搭接接头,搭接长度及配筋构造按03G101-1规定计算。,单根长l1 =(423.76)0.45 20.03215d1.234d = 13.566 (m) 上部纵筋长L1 = 13.5662 = 27.132 (m) 上部纵筋质量(220) M1 = 27.1322.47kg/m2 = 134.03(kg), 梁下部受力纵筋(322):采用在中间支座锚固 两端跨单根长 l21 =40.2250.2(0.030.025柱纵筋)15d34d2 = 10.096 (m) 中间跨单根长 l22 = 3.760.42lae = 3.760.4234d = 4.856 (
9、m),下部纵筋长 l2 =(10.0964.856)3 = 44.856 (m) 下部纵筋质量 M2 = 44.856 m2.98 kg/m2 = 267.34 (kg) (2)箍筋8,按03G101-1,考虑弯钩135。, 单根长度按 l =(0.250.4)280.025 280.008 = 1.524 (m) 加密区箍筋根数,按规定加密区离支座750mm,则: N1=(0.750.05)0.116 = 48 (根), 非加密区箍筋根数 N2= (40.2250.20.752) 0.21 2(3.760.4 0.752)0.21=29(根) 箍筋质量(8) M3 =(4829)1.5240.3952 = 92.70 (kg),