Internal pressure test device and test method for measuring circumferential tensile property of fiber reinforced composite material pipe for structural engineering

The invention relates to an internal pressure test device for measuring the circumferential tensile property of a fiber reinforced composite material pipe for structural engineering. The internal pressure test device comprises an upper end plate, a lower end plate, an opposite-pull screw rod, nuts, a water inlet, an exhaust valve, a sealing ring and strain gauges. Grooves are formed in the lower end of the upper end plate and the upper end of the lower end plate; the sample is tubular, the upper end of the sample sleeved with the sealing ring is located in the groove of the upper end plate, and the lower end of the sample sleeved with the sealing ring is located in the groove of the lower end plate; the opposite-pull screw penetrates through the upper end plate and the lower end plate, andthe two ends are locked through the nuts. The strain gauges are attached to the outer side wall of the sample and the outer surface of the polished opposite-pull screw. The invention further relatesto an internal pressure te