Reinforcing effect of hardwoods on the moment resistance performance of traditional Japanese “nuki”-column joints

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Summary of the rotation tests results of N types

W.S.	\(w_{\text{n}}\) [mm]	\(b_{\text{n}}\) [mm]	\(\rho\) [9] [\({\text{kg/m}}^{ 3}\)]		\(M_{\text{max} }\) [kN mm]		\(M_{\text{y}}\) [9] [kN mm]		\(K\) [9] [k Nm/rad.]
W.S.	\(w_{\text{n}}\) [mm]	\(b_{\text{n}}\) [mm]	Ave.	SD	Ave.	SD	Ave.	SD	Ave.	SD
Si	30	60	792	25.8	799	69.6	450	46.8	11.7	0.90
		75	857	62.4	905	99.4	508	77.4	15.8	4.19
		90	848	32.6	975	58.3	578	24.4	18.3	2.98
K	30	60	520	48.9	500	97.5	291	53.5	10.2	1.72
		75	493	24.1	515	84.2	289	48.8	11.1	2.36
		90	473	55.5	633	129	384	62.9	15.9	5.92
	45	90	531	41.9	917	105	548	85.3	22.8	7.41
H	30	60	469	23.6	546	79.4	323	42.8	9.68	0.88
		75	460	30.7	497	79.7	286	43.4	14.8	4.69
		90	467	32.4	567	83.0	333	49.7	14.1	2.43
	45	90	482	49.9	860	221	499	107	22.8	11.3
Su	30	60	415	57.5	624	148	362	86.5	11.5	3.36
		75	416	64.8	741	183	411	89.3	15.2	3.30
		90	413	60.1	746	170	420	83.4	16.0	5.21
	45	90	381	30.0	992	223	563	127	17.2	4.47

W.S., wood species (Si, K, H and Su represent shirakashi, kuri, hinoki and sugi respectively), \(w_{\text{n}}\): see Fig. 1, \(b_{\text{n}}\): see Fig. 1; \(\rho\), density of nuki; \(M_{ \text{max} }\), maximum moment, \(M_{\text{y}}\), yield moment; \(K\), elastic rotational stiffness; Ave., average; SD, standard deviation