Effect of Intermediate Stiffeners on the Behaviors of Partially Concrete Encased Steel Beams

Table 1

Details of test specimens.

Series	Specimen	Steel beam cross section	Connection type^a	Composite action device^b
PS	PS-NB	RH 150 × 75 × 5 × 7	SBC	—
	PS-SC	RH 150 × 75 × 5 × 7	SBC	Shear connector
	PS-MS	RH 150 × 75 × 5 × 7	SBC	Midspan stiffener
	PS-HS	RH 150 × 75 × 5 × 7	SBC	Plastic hinge zone stiffener
PW	PW-NB	RH 150 × 75 × 5 × 7	WBC	—
	PW-SC	RH 150 × 75 × 5 × 7	WBC	Shear connector
	PW-MS	RH 150 × 75 × 5 × 7	WBC	Midspan stiffener
	PW-HS	RH 150 × 75 × 5 × 7	WBC	Plastic hinge zone stiffener

^aDetails of beam-to-column connection are shown in Figures 5–7. ^bDetails of composite action device are shown in Figure 8.