Anchor Bolt Design

BOLT CALCULATION FOR M16 ANCHOR BOLT MAXIMUM UPLIFT FORCE ( COLUMN C'-2') = DESIGN DIAMETER = Nos. OF BOLTS PROVIDED = MAXIMUM HORIZONTAL FORCE (COLUMN C'-3') = UPLIFT PER BOLT = LENGTH OF EMBEDMENT PROVIDED =

10 16 2 35 5 150

KN ( DUE DUE TO BOLT BOLT PREPRE-TE TENS NSIO IONI NING NG ) mm Nos KN ( DUE DUE TO LATE LATERA RAL L WHE WHEEL EL LOAD LOAD)) KN ( DUE TO BOLT PRE-TENSIONING ) mm

CHECK FOR EMBEDED LENGTH  As per AISC guidelines guidelines L= √Apsf/3.14

mm

Apsf (required surface area) =

Tu 4Φt√f'c

where Tu = force in N = 5000 Φt = resist resistan antt facto factorr = 0.75 0.75 f'c = compre compressi ssive ve streng strength th of concr concrete ete = Apsf = L= Minimum le length of of em embedment = 12 d =

( sq. mm)

32

N/sq.m N/sq.mm m

294.63

mm

9.69

mm

192.00

mm

PROVIDED LENGTH > 9.69 mm

HENCE SAFE

CHECK FOR TENSION  As per ACI-318 Nsa = n Ase,N futa where Nsa = nominal stregth in tension in Newton n = nos. of bolts in a group. = 2 Ase,N = effective x-sectional area of a single bolt =

πd2 4 = 200.96 ( sq. mm) futa = not greater than 1.9 fya or 861.845 N/sq.mm(125000 psi) whichever whichever is less f ya ya = yield st strenth of of an anchor st st ee eel in in N/ N/sq. mm mm = 250 Nsa =

190.912

KN >

10

KN  HENCE SAFE

CHECK FOR SHEAR  As per ACI-318 Vsa = n 0.6 Ase,V futa where Vsa = nominal stregth in shear in pounds n = nos. of bolts in a group. = 2  Ase,V = effective x-sectional x-sectional area of a single single bolt =

πd2 4 = 200.96 ( sq. mm) futa = not greater than 1.9 fya or 861.845 N/sq.mm(125000 psi) whichever whichever is less f ya ya = yield st strenth of of an anchor st st ee eel in in N/ N/sq. mm mm = 250 Vsa =

114.5472

KN >

35 KN  HENCE SAFE

CHECK FOR PULL OUT  As per ACI-318 Npn = Ψc,p Np where Npn = nominal pull out stregth in pounds Ψc,p = modification factor = 1.4 and Np = 8 Abrg f'c where  Abrg = net bearing area area of bolt head(dia 2d) =

f'c = compre compressi ssive ve streng strength th of concr concrete ete = Np = now

Npn =

 = 32

πd2 4 803.84 N/sq.m N/sq.mm m

( sq. mm)

205783 Newton 288.0963

KN >

5

KN  HENCE SAFE