Flexural Behavior of Post-tensioned Lightweight Concrete Continuous One-Way Slabs

International Journal of Concrete Structures and Materials

Table 6 Test results.

Specimen	P _cr (kN)		P _y (kN)		P _n (kN)	V _n (kN)		Δ_cr (mm)	Δ_y (mm)	Δ_n (mm)	f _ps (MPa)	Δ f _ps (MPa)	Δ f _ps−_ACI (MPa)	Δ f _ps−EXP/Δ f _ps−ACI	P _n−ACI (kN m)	P _n−EXP/P _n−ACI	M _cr (kN m)	η _cr	ω	M _n (kN m)	η _n	M _n−EXP/M _n−_ACI
Specimen	Mid	Edge	Mid	Edge	P _n (kN)	Mid	Edge	Δ_cr (mm)	Δ_y (mm)	Δ_n (mm)	f _ps (MPa)	Δ f _ps (MPa)	Δ f _ps−_ACI (MPa)	Δ f _ps−EXP/Δ f _ps−ACI	P _n−ACI (kN m)	P _n−EXP/P _n−ACI	M _cr (kN m)	η _cr	ω	M _n (kN m)	η _n	M _n−EXP/M _n−_ACI
Group 1
S-L/d _p-25	61.7	65.7	80.9	89.8	254.5	77.2	50.1	5.6	13.0	48.8	1613	358	256	1.40	214.5	1.19	14.77	0.0401	0.114	26.98	0.0732	1.35
S-L/d _p-35	23.5	46.1	37.8	64.2	155.5	48.3	29.4	11.8	31.1	85.3	1788	505	256	1.97	155.9	1.00	14.68	0.0398	0.123	26.29	0.0713	1.32
S-L/d _p-45	14.7	30.4	46.6	43.3	111.1	33.2	22.3	11.6	36.8	165.8	1669	430	132	3.25	120.7	0.92	12.25	0.0332	0.116	21.68	0.0588	1.22
Group 2
S-PPR-0.5	14.7	28.4	25.7	24.4	75.9	23.9	14.1	29.1	14.0	95.8	1540	285	132	2.16	97.5	0.78	11.46	0.0311	0.095	14.68	0.0398	0.97
S-PPR-1.0	14.7	30.4	46.6	43.3	111.1	33.2	22.3	11.6	36.8	165.8	1669	430	132	3.25	120.7	0.92	12.25	0.0332	0.116	21.68	0.0588	1.22
S-PPR-1.5	25.5	33.3	34.1	55.0	129.9	40.9	24.0	16.7	57.5	113.6	1655	400	132	3.03	131.8	0.99	13.43	0.0365	0.130	26.82	0.0728	1.32

P _cr cracking load, P _y yielding load, P _n ultimate load, V _n force at failed span, Δ _cr , Δ _y , Δ _n deflection at the first flexural crack, at yielding of mild longitudinal tensile reinforcement, and at the ultimate state, respectively, f _ps, Δ f _ps stress of prestressing strands and its increase, P _n−ACI ultimate load predicted by ACI, P _n(ExP) ultimate load by experiment, η _cr cracking moment capcity (=M _cr/f′ _c ·b _w ·h ²), η _n ultimate moment capcity (=M _n/f′ _c ·b _w ·h ²), ω reinforcing index \( \left( { = \frac{{A_{p} f_{ps} + A_{s} f_{y} }}{{bd_{e} f_{c} '}}} \right) \).