IMPROVEMENT OF METAL BRIDGE ROADWAY STRUCTURE DEPENDING ON DECK PAVEMENT OPERATING BEHAVIOR
https://doi.org/10.31675/1607-1859-2020-22-2-174-184
Abstract
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.
About the Author
S. Yu. Polyakov
Siberian State Transport University
Russian Federation
Russian Federation
Sergei Yu. Polyakov, Engineer
191, Koval'chuk Str., 630049, Novosibirsk
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Review
For citations:
Polyakov S.Yu. IMPROVEMENT OF METAL BRIDGE ROADWAY STRUCTURE DEPENDING ON DECK PAVEMENT OPERATING BEHAVIOR. Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture. 2020;22(2):174-184. (In Russ.) https://doi.org/10.31675/1607-1859-2020-22-2-174-184
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