Experiment on Natural Frequency Change of Reinforced Concrete Members under Low Cycle Loading

Table 10

Coefficients of cubic polynomial model Equation (13).

Coefficients	Specimen
	Z-1∼Z-9	J-1∼J-9	M-1∼M-9
	464.342	1709.89	497.628
	−0.273120219091463	−0.801798388025358	−1.00165849326798
	−210.811670727894	−925.096418576694	−237.681795491431
	−23.6752063223750	−110.527720686002	−26.2093732898868
	18.1227919288250	85.2333666882871	21.9612377145612
	0	0	0
	0.323953069722666	0.395546851710759	0.557882540071001
	0.00059579407036310	0.00258127311544728	0.00560634872500473
	0	0	0
	0	0	0
	−0.0138495848812992	0.00032744647692856	0.0131160269775290
	−4.44132996866784	−5.86075713099332	−4.85689087155177
	0.00026004731450507	−0.0003227936704906	−0.0011537934068080
	0.0923976583244754	−1.18632392696069	0.0562704448782981
	−7.822800905166e − 05	−0.0002285901078045	−0.0008395572236522
	5.1757805967185e − 06	3.7955614628876e − 05	0.00014072890415772
	−0.0137328563625555	−0.0760408388477975	−0.149006278920346
	−1.320325398082e − 06	−6.139924628880e − 06	−3.620413282287e − 05
	13.3407306630236	15.3022606022822	13.6034019915526
	−0.0031497457424234	0.0424940950506309	−0.0033490129536076
Judgment coefficient ()	0.950952	0.962327	0.986819
Root mean square error	3.09919	3.86832	1.788886