TECHNICAL
Stress range ca. 500 MPa Stress range ca. 640 MPa Stress in yield range fy ≈ 500 MPa Stress in yield range fy ≈ 500 MPa
A) COLUMN SHOE SYSTEM
B) MONOLITHIC SYSTEM
FIGURE 16: STRESS DISTRIBUTION WITHIN THE ANCHOR BOLTS, COLUMN SHOE AND REINFORCEMENT AT FAILURE, BOLDA® 30 18
The ultimate stage of the column shoe system is characterized by yielding
of the PPM® bolts (Figure 16 a). At this stage, the stress in the reinforcement
outside of the column shoe area is in the range of σ ≤ 500 MPa. Within
the monolithic system, at the ultimate failure load, the maximum stresses
occur within the reinforcement in the column area between the end of
foundation and the loading point (see Figure 16 b).
Figure 17 and Figure 18 show the corresponding results for the calculations
using BOLDA® 52. In total, the results of the calculations confirm the
above-mentioned findings and correlations regarding failure load, failure
mode and deflections.
Monolithic connection
Failure load: Pu = 646 kN
Failure moment: Mu = 1098.2 kNm
700
600
500
400
300
200
100
0
0 50 100 150 200 250 300 350
Load 2P kN
Displacements mm
Disp no 19
DispCol
DispFdn
1200
1000
800
600
400
200
0
0 50 100 150 200 250 300 350
Moment M kN-m
Displacements mm
Disp no 19
DispCol
DispFdn
700
600
500
Load 2P kN Displacements mm
400
300
200
100
0
Disp no 19
DispCol
DispFdn
0 50 100 150 200 250 300 350
1200
1000
800
600
400
200
0
0 50 100 150 200 250 300 350
Moment M kN-m
Displacements mm
Disp no 19
DispCol
DispFdn
Connection with BOLDA® 52
Failure load: Pu = 658 kN
Failure moment: Mu = 1118.6 kNm
FIGURE 17: LOAD/MOMENT-DISPLACEMENT BEHAVIOR – CONNECTION WITH BOLDA® 52 COMPARED TO MONOLITHIC CONNECTION
56 PEIKKO CONNECTIONS 1/2021