Abstract：On the basis of existing research on precast steel reinforced concrete (SRC) beams, three innovative kinds of SRC beams, namely partially precast steel reinforced concrete (PPSRC) beams, hollow partially precast steel reinforced concrete (HPSRC) beams and partially precast castellated steel reinforced concrete (PPCSRC) beams, are presented in this work. With the aim at investigating the flexural performance of PPSRC and HPSRC beams under sagging moment and shear performance of PPSRC and PPCSRC beams under sagging and hogging moment, static loading tests on 24 specimens of 4 series were conducted. The effects of fabrication method, cross-sectional shape and strength of cast-in-place concrete on the mechanical performance of PPSRC, HPSRC and PPCSRC beams were analyzed. Based on the test results, it can be concluded that the precast outer-shell collaboratively works with the cast-in-place concrete very well, and the fabrication method and strength of cast-in-place concrete may mildly affect the bearing capacity of specimens. Finally, the practical formulas for calculating the shear capacity of PPSRC and PPCSRC beams are proposed, and the calculation results from the formulas agree well with those from the experiments.
