Experimental Study on the Damage of Bridge Pier under the Impact of Rockfall
Table 5
Locations and strain characteristics of strain gauges.
No.
Location
Strain characteristic
1
2 cm above the impact position, closest to the impact point
Plastic deformation generated
2
At the junction of base and bottom of impact surface
In the state of tension, the compressive strain mutation occurred after impact, but still in the elastic range
3
At the back of No. 1 strain gauge
Strain gauge stress increased rapidly and then returned to zero, which belonged to elastic strain
4
At the back of the impact position, lower than the impact position
The strain was very small, several peaks occurred during the second impact of the pendulum ball and finally returned to zero, and the stress-strain was still within the elastic range
5
On the back of No. 3 strain gauge
Under pressure, the compressive strain suddenly occurred after impact, but still in the elastic range, and the compressive stress was about 141.4 MPa
6 and 7
At the junction of the two sides of the column impact surface and the column base
