Tension Test for Axially Vibrated Prestressing Fine-Rolled Screw-Threaded Steel Bars Based on Thread-Contact Connection

Table 4

The parameters used in and the frequencies measured from the field test.

Number	(m)	(m)	Effective tension (kN)	Measured frequency (Hz)
1	0.120	2.517	98.3	498
2	0.123	2.517	196.5	556
3	0.127	2.517	317.6	616
4	0.121	2.517	78.3	478
5	0.124	2.527	220.3	568
6	0.128	2.527	307.6	603
7	0.106	2.527	110.2	514
8	0.109	2.527	196.5	550
9	0.112	2.537	327.6	629
10	0.104	2.537	98.3	493
11	0.108	2.537	210.8	585
12	0.113	2.537	327.6	622
13	0.087	2.547	65.6	488
14	0.161	2.547	196.5	547
15	0.104	2.547	262.1	585
16	0.113	2.547	317.6	605