Nabin Kumar Ijam | Civil & Hydropower Engineer

COLUMN BASE CONNECTION DESIGN

1. FACTORED LOADS

Axial force(\(P\) in kN):
Moment about x(\(M_x\) in kNm):
Moment about y(\(M_y\) in kNm):
Shear force about x(\(F_x\) in kN):
Shear force about y(\(F_y\) in kN):

2. BASE PLATE ASSUMED

Thickness(\(t\) in mm):
Width at x (\(a\) in mm):
Width at y (\(b\) in mm):

3. SIZE OF COLUMN

Width at x (\(c_1\) in mm):
Width at y (\(c_2\) in mm):
Concrete grade of column base (\(f_{ck}\)):

BOLTS SPECIFICATION

Choose a Bolt Grade:
Choose a Bolt Sub-Grade (e.g., 4.6, 4.8):

STEEL PLATE SPECIFICATION

Choose a Steel Grade \(f_y\):

PROVIDED DATA

First input some values like 50mm for both pitch and edge distance and then after calculation of maximum and minimum values of these parameters again input "pt" and "ed".

Pitch of bolts/holes(\(p_t\) in mm):
Edge distance of hole(\(e_d\) in mm):

DESIGN RESULT

1. BOLT SPECIFICATION

Ultimate strength of bolt (\(f_u\)):

Minimum Ultimate strength of bolt (\(f_{u,min}\)):

Yield strength of bolt (\(f_{yb}\)):

Diameter of bolt (\(D_b\)):

Diameter of hole (\(D_h\)):

2. PLATE SPECIFICATION

Ultimate strength of plate (\(f_{up}\)):

Yield strength of plate (\(f_y\)):

3. PITCH AND EDGE DISTANCE

3.1 Pitch distance

Maximum pitch distance (\(p_{max}\)):

Minimum pitch distance (\(p_{min}\)):

3.2 Edge distance

Maximum Edge distance (\(e_{max}\)):

Minimum Edge distance (\(e_{min}\):

4. STRESSES AT THE FOUR EDGES OF PLATES

\(\sigma_1\):

\(\sigma_2\) :

\(\sigma_3\) :

\(\sigma_4\) :

Check for bearing stresses :

5. STRENGTH OF A BOLT

Shear Strength (\(V_{dsb}\)):

Bearing Strength (\(V_{dpb}\)):

Strength of a bolt (\(V_{sb}\)):

6. CHECK FOR THICKNESS OF PLATE

Check for thickness of plage :

7. ANCHOR RODS

Anchor rod design :