In buildings, steel-concrete composite beams with web openings save service space but weaken structural performance. To address this issue, this study proposes the use of a perfobond strip (PBL) connector in the opening area to compensate for the loss of connection performance and composite action caused by the web openings. A total of 25 specimens were subjected to experimental testing and finite element simulation to investigate the effects of 11 varying parameters-including connector type, ho