Table. 1: Characteristic Points of Specimens.

Specimens    Direaction Peak point Ductility factor
   Pm/kN    Pm/fcbho   Δm   θm
2-DW1 push 1271 0.1393 20.51 1/117 6.18
pull 1253 23.85 1/101
2-DW4-L1 push 1402 0.1558 12.79 1/125 4.22
pull 1561 7.73 1/207
2-DW5-L2 push 1082 0.1166 62.81 1/51 6.96
pull 1213 46.80 1/68