高温下复合材料桥梁防撞装置节段冲击及残余性能试验

The experimental on impact and residual compressive strength of segment of composite ship-bridge anti-collision system at high temperatures was conducted according to the related codes. The effects of foam core density, impact energy and environmental temperature on impact behavior and post impact residual compressive strength of segments were summarized. The results show that the impact energy loss of the specimens increases with the increase of temperatures. Compared to the specimens at 30℃, the energy absorbing ability of specimens at 50, 70 and 90℃ decreases by 8.5%, 9.6% and 19.4%, respectively. In the meantime, the impact resistance of the specimens becomes larger when the foam core density is higher. According to the post-impact residual compressive strength, the impact damage of specimens is serious at high temperatures, and the stiffness decreases sharply. Although the residual compressive strength of damaged specimens decrease, the ultimate strength of specimens is identical.