Seismic Behaviour of Cast-In-Situ Phosphogypsum-Reinforced Concrete Grid Frame Composite Walls

Table 5

Test results of characteristic points.

Specimen number (axial compression ratio)	Loading direction	Cracking point		Yield point		Peak point		Ultimate point		μ	θu
		Fcr (kN)	δcr (mm)	Fy (kN)	δy (mm)	Fm (kN)	δm (mm)	Fu (kN)	δu (mm)
KJ1	Reverse	8.810	9.353	14.587	24.056	18.110	57.364	15.829	85.668	3.566	1/21
(0.072)	Forward	8.334	6.874	14.274	21.104	16.817	52.303	14.611	78.478	3.488	1/23
KJ2	Reverse	11.776	9.190	15.609	18.463	18.677	38.074	16.278	63.580	3.444	1/28
(0.103)	Forward	11.402	8.311	12.319	17.567	13.774	36.075	9.996	61.419	3.496	1/29
KJ3	Reverse	11.854	8.691	13.642	17.334	13.968	35.160	13.580	61.029	3.521	1/29
(0.127)	Forward	11.810	7.532	10.249	16.921	13.106	33.869	12.937	55.147	3.259	1/33
ZHQ1	Reverse	16.385	8.084	36.293	22.725	43.054	33.296	31.254	85.784	3.775	1/21
(0.107)	Forward	14.581	8.058	34.032	21.537	40.738	35.534	30.330	73.619	3.418	1/24
ZHQ2	Reverse	16.385	7.662	36.293	22.130	43.054	32.472	31.254	84.4522	3.816	1/21
(0.108)	Forward	14.581	8.381	34.032	22.001	40.739	37.160	30.330	76.704	3.486	1/23
ZHQ3	Reverse	20.626	6.022	27.701	11.869	46.333	35.064	37.755	44.522	3.751	1/40
(0.167)	Forward	13.100	5.094	26.944	9.975	39.216	32.596	37.798	41.763	4.186	1/43
ZHQ4	Reverse	19.112	5.129	30.837	10.518	46.828	34.178	46.828	34.178	3.249	1/53
(0.154)	Forward	18.215	4.298	29.913	9.159	50.961	29.275	50.961	29.275	3.196	1/61