Papers by Keyword: Bridge Superstructure

Abstract: Based on practice engineering and model test, and considering different bridge elevation, elevation of sea bed, and the different wave factor, the author uses the 2D numerical wave tank based on the software ANSYS FLUENT which is established by ourselves to carry on the numerical simulation to various models, and compares with the corresponding experimental values. The author verified that all the forces are descending with the increase of bridge elevation. The most dangerous bridge elevation under wave action exists in bridge design, so it should be avoided. The optimum elevation of the bridge deck is recommended +5.5 m, and some advices on practice design engineering are presented.

Abstract: Bridge in the upper structure of ship collision navigation is typical of ship collision accident. In order to protect the bridge of the upper structure, The design adopt high frame which is fabricated according to the protection devices of elastic-plastic deformation to absorb the hull kinetic energy. Using the general explicit dynamic analysis program LS-DYNA 9.7 for ship collision frame which is fabricated according to the numerical simulation, getting the section size, material properties and the ship speed of the protection devices and ship collision relations between influence. Analysis results could be the design and maintenance reference for the decision-making departments.

Abstract: The concept of the fiber reinforced polymer (FRP)-concrete composite design was exploited in a new type of bridge superstructure. The proposed FRP-concrete composite bridge superstructure is intended to have durable, structurally sound, and cost effective composite system that will take full advantage of the inherent and complementary properties of FRP material and concrete. As a trial case, a prototype bridge superstructure was designed as a simply supported single-span one-lane bridge with a span length of 10 m. The bridge superstructure consists of two bridge decks and each bridge deck is comprised of four FRP box sections combined with a thin layer of concrete in the compression zone. A test specimen, fabricated as a one-third scale model of the prototype bridge superstructure, was subjected to four-points loading to simulate the two heaviest axles of the Chinese design truck load. The test results indicate that the proposed bridge model meets the stiffness requirement and has significant reserve strength.