Analysis of the Base of a Solid I-beam Column

Design models of the column base (figures in the circles indicate the numbers of the design sections of the base plate: 1 – wing plate; 2 – base plate)

Objective: Check the mode for calculating base plates

Task: Check the load-bearing capacity of the base plate for the design section No.1.

Source: Steel Structures: Student Handbook / [Kudishin U.I., Belenya E.I., Ignatieva V.S and others] - 13-th ed. rev. - M.: Publishing Center "Academy", 2011. p. 259.

Compliance with the codes: SNiP II-23-81*, SP 16.13330, DBN B.2.6-163:2010.

Initial data file:

6.1.sav;
report — Kristall-6.1.doc

Initial data:

KRISTALL parameters:

Steel: C345  category 1
Group of structures according to the table 50* of SNiP II-23-81* 3
Importance factor 1
Service factor  1,15

Manual calculation (SNiP II-23-81*):

1. Design bending moment acting in the design section of the base plate:

\[ M=\alpha \sigma_{f} a^{2}=0,125\cdot 1,19\cdot 23,4^{2}=81,45 \quad kN/cm. \]

2. Check the bending strength of the base plate ( γ_c = 1,15 – according to the table 6* of SNiP II-23-81*):

\[ \frac{6M}{t_{p}^{2} }=\frac{6\cdot 81,45}{4^{2}}=30,5436 \quad kN/cm^{2} \quad\quad < R_{y} \gamma_{c} =30\cdot 1,15=34,5 \quad kN/cm^{2}. \]

Comparison of solutions:

Comments:

The service factor of the base plate according to the table 6* of SNiP II-23-81* is not taken into account in the source.