7BARBERO E J, FU S H, RAFTOYIANNIS L. Ultimate bending strength of composite beams[ J]. Journal of Materials in Civil Engineering, 1991,3 (4):292 - 306.
8GAETANO M, GIOVANNI F, EDOARDO C. Modeling of Steel - concrete composite beams under negative bending[ J ]. Journal of engineering mechanics, 1999, 125 (6) :654 -662.