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Tests of steel arch and rock bolt support resistance to static and dynamic loading induced by suspended monorail transportation

Andrzej Pytlik
Andrzej Pytlik
   | 28 giu 2019
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Article Category: Research Article
Pubblicato online: 28 giu 2019
Pagine: 81 - 92
Ricevuto: 22 feb 2019
Accettato: 09 mag 2019
DOI: https://doi.org/10.2478/sgem-2019-0009
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© 2019 Andrzej Pytlik, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Figure 1

Example view of a route of a suspended monorail with a transport of steel arches that load the ŁP yielding steel arch support frame.
Example view of a route of a suspended monorail with a transport of steel arches that load the ŁP yielding steel arch support frame.

Figure 2

Mine working diagram with transportation via suspended monorail.
Mine working diagram with transportation via suspended monorail.

Figure 3

Loading diagram of the ŁP yielding support frame joint and bolts.
Loading diagram of the ŁP yielding support frame joint and bolts.

Figure 4

Bolt rod and nut: (a) – view of the rod with the nut; (b) – drawing of the rod with a trapezoidal thread and sectional view.
Bolt rod and nut: (a) – view of the rod with the nut; (b) – drawing of the rod with a trapezoidal thread and sectional view.

Figure 5

Bolt rod test under static tensile loading: (a) – loading course as a function of bolt rod elongation; (b) – ruptured rod after the test.
Bolt rod test under static tensile loading: (a) – loading course as a function of bolt rod elongation; (b) – ruptured rod after the test.

Figure 6

Test stand diagram for bolt tests under static load.
Test stand diagram for bolt tests under static load.

Figure 7

Courses of load as a function of elongation under static load.
Courses of load as a function of elongation under static load.

Figure 8

Test facility diagram.
Test facility diagram.

Figure 9

Courses of load as a function of time under dynamic tensile loading of the bolt rods.
Courses of load as a function of time under dynamic tensile loading of the bolt rods.

Figure 10

Relation of the maximum force as a function of impact velocity.
Relation of the maximum force as a function of impact velocity.

Figure 11

Diagram of the test stand for bolt rod shear tests under: (a) – static load; (b) – dynamic load.
Diagram of the test stand for bolt rod shear tests under: (a) – static load; (b) – dynamic load.

Figure 12

Relation of load as a function of bolt rod displacement during its shearing (maximum shearing force Fsmax = 229 kN).
Relation of load as a function of bolt rod displacement during its shearing (maximum shearing force Fsmax = 229 kN).

Figure 13

Relations of load as a function of time under dynamic shear loading of the bolt rods.
Relations of load as a function of time under dynamic shear loading of the bolt rods.

Figure 14

Relation of the maximum shearing force and impact velocity.
Relation of the maximum shearing force and impact velocity.

Figure 15

Test stand for bolt rod bending strength tests under static load.
Test stand for bolt rod bending strength tests under static load.

Figure 16

Test stand for bending strength tests under dynamic load: (a) – rod bending by an angle smaller than 90°; (b) – rod bending by 90°.
Test stand for bending strength tests under dynamic load: (a) – rod bending by an angle smaller than 90°; (b) – rod bending by 90°.

Figure 17

Course of load as a function of bolt rod displacement during its bending (maximum bending force Fsmax = 26.3 kN).
Course of load as a function of bolt rod displacement during its bending (maximum bending force Fsmax = 26.3 kN).

Figure 18

Courses of load Fd as a function of time t under dynamic bending loading of the bolt rods.
Courses of load Fd as a function of time t under dynamic bending loading of the bolt rods.

Figure 19

Diagram (left) and view (right) of the facility for sliding joint tests under dynamic load.
Diagram (left) and view (right) of the facility for sliding joint tests under dynamic load.

Figure 20

Course of load as a function of joint displacement under static load (maximum loading force Fsmax = 213 kN).
Course of load as a function of joint displacement under static load (maximum loading force Fsmax = 213 kN).

Figure 21

Course of load Fd as a function of time t under dynamic load of the joint at heights: h = 10 cm (a) and h = 30 cm (b).
Course of load Fd as a function of time t under dynamic load of the joint at heights: h = 10 cm (a) and h = 30 cm (b).

The result of the bolt rod test under dynamic bending loading.

Test numberDrop mass m1, kgCross-bar mass m2, kgDrop height h, mImpact velocity v, m/sMaximum load value Fdmax kNPost-test inspection
1250000.010.4429.7The rod was not bent by 90° The sample did not rupture
20.020.6329.4The rod was bent by 90°
30.030.7732.1The samples did not rupture
40.040.8930.2

Results of the rod-and-nut assembly load capacity tests.

Test numberMaximum load value Fsmax kNBolt elongation f corresponding to Lmax mmPost-test inspection
124756.9Bolt nut
223438.1thread shearing
323643.3

The test result for the joint constructed from V29 sections under dynamic load.

Test numberDrop height h, mImpact velocity v, m/sSectionNumber of shacklesNut tightening torque, NmMaximum load capacity Fdmax , kN Comments
10.11.4V292350197the joint stopped after
approx. 10 cm
20.22.8206total joint yield
30.34.2197

The result of the bolt rod test under dynamic shear loading.

Test numberDrop mass m1, kgCross-bar mass m2, kgDrop height h, mImpact velocity v, m/sMaximum load value Fdmax kNPost-test inspection
1250000.071.17194the rod was not shorn
20.081.25213the rod was shorn
30.091.33227
40.11.40228
50.121.53229

The result of the bolt rod test under dynamic tensile loading.

Test numberDrop mass m1, kgCross-bar mass m2, kgDrop height h, mImpact velocity v, m/sMaximum load value Fdmax, kN Post-test inspection
1400033000.010.44110The rod and nut were not
20.020.63136destroyed
30.030.77164
40.040.89200
50.050.99204Bolt nut thread shearing and cracking
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