rcc53 column design

Project Spreadsheets to BS 8110 REINFORCED CONCRETE COUNCIL Client Advisory Group Made by Date Page Location Ground floor columns at B1, B2 etc RMW 8-May-15 91

Checked Revision Job NoOriginated from RCC53.xls' on CD 1999 BCA for RCC chg - R68

MATERIALSfcu 35 N/mm m, steel 1.05 Cover to link 30 mm

fy 460 N/mm m, conc 1.5 h agg 20 mm SECTION

h 400 mmb 300 mm

with 3 bars per 300 face X Xand 3 bars per 400 face

ie. 400 x 300 columns with 8 bars

RESTRAINTS Top BtmLo (mm) Condition Condition Braced ? Le (mm) Slenderness Status

X-AXIS 3600 F F N 1.2 4320 Lex/h = 10.80 Column isY-AXIS 3600 F F N 1.2 4320 Ley/b = 14.40 SLENDER

LOADCASES AXIAL TOP MOMENTS (kNm) BTM MOMENTS (kNm)N (kN) M ix M iy M ix M iy

B1 3500 90.0 25.0 90.0 25.0B2 3000 80.0 60.0 80.0 60.0

Loadcase 3 1000 100.0 35.0 100.0 35.0Loadcase 4 1200 50.0 150.0 50.0 150.0Loadcase 5 500 220.0 90.0 220.0 90.0Loadcase 6 2500 35.0 25.0 35.0 25.0

BAR ARRANGEMENTS BAR CENTRES (mm)Bar Asc % Link 300 Face 400 Face Nuz (kN) Checks

T 40 8.38 10 90 140 0 Asc > 6 % (3.12.6.2)T 32 5.36 8 96 146 4594 okT 25 3.27 8 100 150 3535 okT 20 2.09 6 104 154 2938 okT 16 1.34 6 106 156 2556 okT 12 0.75 6 108 158 2258 ok

DESIGN MOMENTS (kN X AXIS Y AXIS COMBINEDK M add Mx M add My Axis M ' REBAR max V *

B1 0.297 24.2 114.2 32.3 57.3 X 138.4 8 T32 98.9B2 0.432 30.3 110.3 40.4 100.4 Y 123.9 8 T32 101.7

Loadcase 3 0.965 22.5 122.5 30.0 65.0 X 187.9 8 T20 72.4Loadcase 4 0.921 25.8 75.8 34.4 184.4 Y 220.3 8 T32 101.0Loadcase 5 1.000 11.7 231.7 15.6 105.6 X 359.5 No Fit 97.3Loadcase 6 0.395 23.1 58.1 30.7 55.7 Y 68.4 8 T25 87.5

SEE CHARTS ON NEXT SHEET

SYMMETRICALLY REINFORCED RECTANGULAR COLUMN DESIGN, BENTABOUT TWO AXES TO BS 8110:1997