Civil Engineering Reference
In-Depth Information
8
Example 3: Column strengthening
8.1
System
8.1.1 General
Owing to a change of use, a reinforced concrete column in a residential building needs
to be strengthened. As-built documents with structural calculations to DIN 1045 [146]
are available. A wrapping of CF sheet is to be used for strengthening the column.
Figure 8.1 shows the structural system requiring strengthening.
8.1.2 Loading
The loads are predominantly static. Three load cases will be investigated for ultimate
limit state design:
-
Load case 1
represents the situation prior to strengthening.
-
Load case 2
is the loading during strengthening. The strengthening measures are
carried out under the dead load of the member. Existing fitting-out items will be
removed during the strengthening work.
-
Load case 3
represents the loading situation in the strengthened condition.
The actions for the various load cases are listed in Table 8.1. Furthermore, the
eccentricity of loading due to imperfections must be considered according to DIN
EN 1992-1-1 [20, 21] section 5.2 (7):
e
i
l
0
=
400
3000
=
400
7
:
5mm
Fig. 8.1
Column system requiring strengthening
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