Dynamic responsive characteristics of nailed plywood–timber joints under harmonic vibrations

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Cycles at failure of each specimen

Input acceleration (equivalent static load)	Frequency (Hz)
Input acceleration (equivalent static load)	2	3	4	5	6	7
165 gal (one-third of static maximum resistance)	300^a	118	343	750^a	900^a	1050^a
	35	157	167	344	900^a	1050^a
	300^a	130	128	387	900^a	1050^a
	300^a	52	157	720	900^a	1050^a
	56	141	284	750^a	900^a	1050^a
	300^a	199	368	750^a	900^a	1050^a
Average	215^b	133	241	617^b	900^b	1050^b
330 gal (two-thirds of static maximum resistance)	18	17	94	306	266	1050^a
	12	33	108	307	455	1050^a
	11	51	49	240	900^a	1050^a
	14	43	61	191	309	1050^a
	17	57	43	178	416	501
	12	21	98	426	859	1050^a
Average	14	37	76	275	534^b	959^b
495 gal (static maximum resistance)	9	27	27	60	215	334
	10	15	64	143	268	468
	10	26	29	100	78	342
	12	17	27	51	81	277
	11	26	39	146	152	1043
	8	16	35	340	358	524
Average	10	21	37	140	192	498

Italic values denote nail-head-pull-through with occasional plywood shear, bold values denote bending fatigue failure of nails
^a No critical failure within 150 s
^b More than this value