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

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The result of the bolt rod test under dynamic bending loading_

Test number	Drop mass m1, kg	Cross-bar mass m2, kg	Drop height h, m	Impact velocity v, m/s	Maximum load value Fdmax kN	Post-test inspection
1	2500	0	0.01	0.44	29.7	The rod was not bent by 90° The sample did not rupture
2			0.02	0.63	29.4	The rod was bent by 90°
3			0.03	0.77	32.1	The samples did not rupture
4			0.04	0.89	30.2

Results of the rod-and-nut assembly load capacity tests_

Test number	Maximum load value Fsmax kN	Bolt elongation f corresponding to Lmax mm	Post-test inspection
1	247	56.9	Bolt nut
2	234	38.1	thread shearing
3	236	43.3

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

Test number	Drop height h, m	Impact velocity v, m/s	Section	Number of shackles	Nut tightening torque, Nm	Maximum load capacity Fdmax , kN	Comments
1	0.1	1.4	V29	2	350	197	the joint stopped after
							approx. 10 cm
2	0.2	2.8				206	total joint yield
3	0.3	4.2				197

The result of the bolt rod test under dynamic shear loading_

Test number	Drop mass m1, kg	Cross-bar mass m2, kg	Drop height h, m	Impact velocity v, m/s	Maximum load value Fdmax kN	Post-test inspection
1	2500	0	0.07	1.17	194	the rod was not shorn
2			0.08	1.25	213	the rod was shorn
3			0.09	1.33	227
4			0.1	1.40	228
5			0.12	1.53	229

The result of the bolt rod test under dynamic tensile loading_

Test number	Drop mass m1, kg	Cross-bar mass m2, kg	Drop height h, m	Impact velocity v, m/s	Maximum load value Fdmax, kN	Post-test inspection
1	4000	3300	0.01	0.44	110	The rod and nut were not
2			0.02	0.63	136	destroyed
3			0.03	0.77	164
4			0.04	0.89	200
5			0.05	0.99	204	Bolt nut thread shearing and cracking