Advances in Materials Science and Engineering

Research Article

Experimental Assessment on the Hysteretic Behavior of a Full-Scale Traditional Chinese Timber Structure Using a Synchronous Loading Technique

Table 4

The characteristic parameters of the three-phase linear model.


N (kN)	Elastic phase		Yield point	Elastic-plastic rise phase		Characteristic values
N (kN)	K_e	(%)	K_y	K_p	(%)	F_max/F_y	Δ_max/Δ_y

30 (1st load)	0.337	—	0.242	0.027	—	1.391	6.865
60 (2nd load)	0.411	22.025	0.279	0.039	41.843	1.470	7.248
90 (3rd load)	0.500	21.614	0.340	0.050	30.501	1.471	7.818

Note. K_e and K_p = the stiffness in elastic and elastic-plastic rise phases, respectively, and K_y = yield stiffness, where K_e = F_e/Δ_e, K_y = F_y/Δ_y, and K_p = (F_p − F_e)/(Δ_p − Δ_e); , , and = the change rates of stiffness in the elastic phase, at the yield point, and in the elastic-plastic rise phase, respectively, where ρ_K = (K_B − K_A) × 100/K_A (K_A refers to the stiffness of K_B under the higher level of vertical loads).