Connection Type - Fixed Column Base (European Code EN 1993-1-8:2005)

Using the software, you can define and verify a fixed column base with or without stiffeners. It is possible to use column piers made of I-sections, box sections, or pipe sections.

During verification, the software applies the following code regulations:

• steel code for members EN 1993-1-1
• steel code for connections EN 1993-1-8
• concrete code EN 1992-1
• CEB (COMITE EURO-INTERNATIONAL DU BETON) Guide - Design of Fastening in Concrete Thomas Telford 1997.

During the connection analysis, the software checks the resistance of all components of a connection:

• Bearing pressure resistance of foundation concrete F_,CRd - according to EN1993-1-8 section 6.2.5.(3) and EN1992-1 point 6.7.(2)
• Tensile resistance of an anchor F_T,Rd as the minimum of the following resistances:
  • resistance for pull-out failure - according to EN 1992-1 point 6.4.2.(2)
  • resistance for steel failure - according to EN1993-1-8 section 6.2.6.12.and Table 3.4.2
  • resistance for pull-out failure of concrete above the head - CEB Guide
  • resistance for concrete cone failure - CEB Guide
  • splitting failure resistance - CEB Guide
• Anchor resistance for shear F_1vb,_Rd and for bearing pressure onto concrete F_2vb,_Rd - according to EN1993-1-8 section 6.2.2 (7,8) and Table 3.4
• Concrete cone resistance for pry-out failure F_v,Rd,cp - CEB Guide
• Resistance for concrete edge failure F_v,Rd,c - CEB Guide
• Resistance of the base plate for shear with slippage F_f,_{Rd -} according to EN1993-1-8 section 6.2.2 (6)
• Resistance for bearing pressure of the wedge onto concrete F_v,Rd - according to EN1992-1
• Resistance of the column web in tension - according to EN1993-1-8 section 6.2.6.3
• Resistance of the column flange and web in compression - according to EN1993-1-8 section 6.2.6.7
• Resistance of the base plate subjected to bending in the tension zone- according to EN1993-1-8 section 6.2.6.11
• Resistance of welds between the column and the base plate, as well as vertical and horizontal welds connecting stiffeners - according to EN1993-1-8 section 4.5.3
• Resistance of stiffeners - according to EN1993-1-1 section 6.2.1.

Total resistance of a connection for simple compression N_j,Rd is evaluated according to EN1993-1-8 section 6.2.8.2.

N_j,Ed / N_j,Rd ≤ 1.0

Total resistance of a connection for bending and/or axial force M_j,Rd, is evaluated according to EN1993-1-8 section 6.2.8.3 and Table 6.7.

M_j,Ed,y / M_j,Rd,y ≤ 1.0 or

M_j,Ed,z / M_j,Rd,z ≤ 1.0

Total resistance of a connection for shear V_j,Rd is evaluated according to EN1993-1-8 section 6.2.2 as a sum of bolt resistances, slippage resistance, and wedge resistance.

V_j,Ed,y / V_j,Rd,y ≤ 1.0 or

V_j,Ed,z / V_j,Rd,z ≤ 1.0

The software also evaluates stiffness of a connection and classifies a column base as rigid, semi-rigid, or pinned. The evaluated stiffness of a connection can be ascribed to a structure by defining additional elastic releases in the analyzed connection. Recalculation of the structure enables more accurate estimation of loads acting on a connection.

For connections with stiffeners, the software additionally checks the resistance of each stiffener, and the efficiency ratio of welds connecting stiffeners with the column pier (vertical welds) and with the base plate (horizontal welds).