Design and Simulation Analysis of a New Type of Assembled UHPC Collision Avoidance

Abstract

<jats:p>Ship-bridge collisions are one of the most common types of accidents, and bridge anti-ship collision devices are of great importance for bridge protection. First, a new type of assembled ultra-high performance concrete (UHPC) collision avoidance is proposed in this paper. The main components of the device are double-deck, two-way, densely reinforced ultra-high performance concrete floating boxes that are connected by high-strength bolts to form the whole structure and are equipped with steel supporting elements to form a collision energy dissipation device. The device is self-floating in water, is strongly energy absorbing due to plastic deformation, has a high degree of toughness, is corrosion resistant, and so on. This device also benefits from modular manufacturing, efficient installation, and easy replacement of damaged parts. Then, in this paper, the main parameters of the new collision avoidance, such as the material of the internal supporting elements, the wall thickness of the floating box, and the reinforcement ratio of the floating box, are optimized. Finally, a performance analysis and evaluation of the UHPC collision avoidance for the Honghe Bridge in Zhuhai City are carried out by using LS-DYNA program. The numerical results show that the new collision avoidance has significant advantages in reducing the ship–bridge collision force, prolonging the ship–bridge collision time, and protecting the ship. The results show that the assembled UHPC collision avoidance system is very effective for protecting ships and bridges in the event of a ship–bridge collision.</jats:p>

Research on a Ship Deflection Anti-Collision Method Based on a Water-Jet Interference Flow Field

“…As research becomes more advanced, more and more scholars are proposing the use of new materials to increase the crashworthiness of striking avoidance devices and improve their effectiveness. The new prefabricated ultra-high-performance-concrete anti-striking device [11], rubberized concrete [12], fiber-reinforced polymer [13][14][15][16][17][18], and the flexible and composite anti-striking devices [19,20] are too costly, and their durability and application value need to be further explored. This kind of passive anti-striking device has a long construction period, and once a strike occurs, the maintenance and replacement cost is high, which also affects the navigation of the waterway and increases unnecessary risks and losses.…”

A new polyurethane-steel honeycomb composite pier anti-collision device: Concept and compressive behavior

“…Thus, engineers and researchers have conducted a lot of research and developed various protection devices to effectively protect the bridge piers. For example, Zhou et al (2020) proposed a new type of assembled ultra-high performance concrete (UHPC) collision avoidance, which could reduce the collision force between shipping vessels and bridges, prolong the collision time, and protect the vessels as well. Wang and Morgenthal (2019) studied an independent protective structure supported by concrete-filled steel pipes, which could protect piers from barge collision by absorbing the energy through plastic deformation.…”