As an important technological innovation in the field of highway bridges, flexible composite bridge collision avoidance facilities play an important role in ensuring navigation safety. In traditional bridge design, reinforced concrete is a common structural material, but its impact resistance is limited, and it cannot effectively absorb the impact energy brought by ship collision, which is easy to cause bridge damage and ship accidents. In order to solve this problem, the designers based on JTG D60-2015 general code for highway bridge and culvert design, JTG B01-2014 highway engineering technical standard and JTG D62-2012 highway reinforced concrete and prestressed concrete bridge and culvert design code and other related specifications, after research and development, the launch of flexible composite bridge collision facilities.
The main structure of the bridge collision avoidance facility is made of fiber-reinforced composite materials, which have high strength, light weight and good toughness characteristics. In the event of a ship collision, fiber-reinforced composites can effectively absorb impact energy and reduce the impact on the bridge structure through their flexible properties. This not only protects the bridge from damage, but also reduces the level of injury to ships and people in the event of an accident.
According to the characteristics and sizes of different navigable vessels, the designers have made reasonable selection and design according to GB50139-2014 inland navigation standards and "Guide Specification and Commentary for Vessel Collision Design of Highway Bridges" (AASHTO, 1991). For large ocean-going vessels, laminated flexible composite designs are used to provide higher crash resistance. This structural form is constructed through a multi-layered combination of fiber-reinforced composite materials, which can effectively withstand the impact of large ships and ensure the safety of bridges while ensuring stiffness. For small inland waterway vessels, small flexible buffers are used to ensure their safe passage. These small units are compact in design, easy to install and maintain, and provide good energy absorption in the event of a boat collision.
Through the research and development and application of anti-collision facilities for flexible composite bridges, it can not only improve the impact resistance of bridges, protect the safe passage of ships, but also reduce the economic losses and environmental impact caused by accidents. In addition, fiber-reinforced composite materials have excellent durability and corrosion resistance, which can reduce the maintenance cost and cycle time of bridges. Therefore, flexible composite bridge collision avoidance facilities are a feasible and promising technology option.