混凝土强度C55, fc=25.3 N/mm2; 箍筋HRB400,fyv=360 N/mm2,抗震等级3级
①柱轴压比:≤0.3 → 配箍特征值0.06
计算:0.06*25.3/360=0.00422
则:0.00422*450*450*100/450/8=23.7375 mm2(钢筋面积)(柱子500*500)
0.00422*550*550*100/550/8=29.0125 mm2(钢筋面积)(柱子600*600)
②柱轴压比: 0.4 → 配箍特征值0.07
计算:0.07*25.3/360=0.00492
则:0.00492*450*450*100/450/8=27.675 mm2(钢筋面积)(柱子500*500)
0.00492*550*550*100/550/8=33.825 mm2(钢筋面积)(柱子600*600)
③柱轴压比: 0.5 → 配箍特征值0.09
计算:0.09*25.3/360=0.006325
则:0.006325*450*450*100/450/8=35.578125 mm2(钢筋面积)(柱子500*500)
0.006325*550*550*100/550/8=43.484375mm2(钢筋面积)(柱子600*600)
④柱轴压比: 0.6 → 配箍特征值0.11
计算:0.11*25.3/360=0.007731
则:0.007731*450*450*100/450/8=43.486875 mm2(钢筋面积)(柱子500*500)
0.007731*550*550*100/550/8=53.150625 mm2(钢筋面积)(柱子600*600)
⑤柱轴压比: 0.7 → 配箍特征值0.13
计算:0.13*25.3/360=0.009136
则:0.009136*450*450*100/450/8=51.39 mm2(钢筋面积)(柱子500*500)
0.009136*550*550*100/550/8=62.81 mm2(钢筋面积)(柱子600*600)
⑥柱轴压比: 0.8 → 配箍特征值0.15
计算:0.15*25.3/360=0.010542
则:0.010542*450*450*100/450/8=59.29875mm2(钢筋面积)(柱子500*500)
0.010542*550*550*100/550/8=72.47625 mm2(钢筋面积)(柱子600*600)
因篇幅问题不能全部显示,请点此查看更多更全内容