rs 750 (70 g

rsr

0.8856451.5

31.62

) 664.2mm

L0/D

30

h0 r rs 1414.2mm

2

1

11400e0/h0

(L0/D) 1 2

1 0.2 2.7e0/h0 1.86 1 1 2 1.15 0.01L0/D 0.85 1

'

1

1400 1360/1414.2

(30) 1 0.85 1.88

2

e0 e0 1.88 871.78 1644.54

设 值

=0.4

fcdf'sd

2

Ae'0 BrDgr Ce'0

2

0.0206

Ndu Arfcd Cprf'sd 4063.81 Ndu/ 0Nd 1.005

轴向力设计值与实际值基本相等，所得配筋率 0.0206即为所求。 所需钢筋的截面面积为：A r 0.04 3.14 750 3638.75mm

2

选56 46(40.2mm)。As 38680.2mm，rs 750 (70

22

40.52

) 660mm