Nonlinear Analysis for the Crack Control of SMA Smart Concrete Beam Based on a Bidirectional B-Spline QR Method

Table 1

The recovery stress in a certain temperature range of SMA wires with different prestrains (MPa).

Temperature (°C)	Stress of 4% prestrain	Stress of 6% prestrain	Stress of 8% prestrain
20	0	0	0
30	2.714	2.731	2.748
40	7.412	9.543	13.647
50	62.341	39.423	27.481
60	165.834	197.854	112.572
70	218.125	275.371	158.407
80	241.534	309.025	339.418
90	281.413	365.412	394.857
100	296.417	379.142	501.637
110	325.426	395.427	537.486
120	327.013	399.652	595.213