Open AccessIMPROVEMENT OF METAL BRIDGE ROADWAY STRUCTURE DEPENDING ON DECK PAVEMENT OPERATING BEHAVIOR
Author(s) -
Sergey Polyakov
Publication year - 2020
Publication title -
vestnik tomskogo gosudarstvennogo arhitekturno-stroitelʹnogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2310-0044
pISSN - 1607-1859
DOI - 10.31675/1607-1859-2020-22-2-174-184
Subject(s) - asphalt , service life , structural engineering , bridge (graph theory) , stiffness , bridge deck , deck , orthotropic material , stress (linguistics) , fatigue limit , asphalt pavement , engineering , forensic engineering , materials science , finite element method , composite material , reliability engineering , medicine , linguistics , philosophy
The bridge pavement perceives millions of live load application cycles during its service life. Therefore, fatigue defects often occur in asphalt. These defects are associated with insufficient fatigue strength, for example, top-bottom cracks that appear after several years of operation and grow from top to bottom. These cracks cause more serious defects. It is necessary to prevent their occurrence. The purpose of this article is to increase the asphalt service life on bridge superstructures by developing the pavement design method. To achieve this goal, the pavement fatigue strength is analyzed. Firstly, asphalt stress-strain state is determined under the heavy load. Secondly, a safe stress level is prescribed. At this stress level, asphalt receives the required load cycles without failure. A significant increase in the orthotropic steel deck stiffness is determined to be necessary. The practical significance is the analysis of several ways to reduce asphalt stresses to the required level. The effectiveness of these methods is evaluated. New problems are identified that will enable the development of the computation method for the bridge pavement and its practical applications. The originally includes the pavement fatigue strength analysis on road bridges with regard to the temperature influence on the asphalt fatigue strength.