BRIDGE ROAD collapsible BRIDGE WITH HIGH WIND Rigidity of the universal bridge constructions

摘要

Utility model (PM) refers to the construction of road bridges collapsible (APM), mainly to bypass the destroyed fixed bridges. It can be used, for example, when transiting APM device structures, whose main beams are collected from the model and the end sections of CMD. The disadvantage of these designs sections CMD is that sections of the vertical walls have a continuous surface. This makes the impact on them of considerable lateral forces from wind loads, which reduces aerodynamic stiffness of superstructures and, as a consequence of all the bridge of the CMD. The object of the PM is to improve aerodynamic stiffness of the span of UMK ARM. Said technical problem is solved by the fact that the superstructure APM with increased aerodynamic stiffness of CMD consists of main beams mounted from the standard and end sections having upper and lower belts, vertical walls, racks, vertical and longitudinal stiffeners, and also end ribs, characterized in that the vertical walls of the sections in the compartments between the posts and stiffeners arranged perforations that reduce the surface area of ​​the vertical wall sections and thereby reduce the impact strength ve Trova load on the main beams of the superstructure and increase aerodynamic stiffness of the superstructure.