DETERMINATION OF BEARING CAPACITY OF METAL SPANS WITH SOLID WALL WITH UPPER-LEVEL TRAFFIC BY THE MAGNITUDE OF THE ELASTIC DEFLECTION FROM RAILWAY LOAD

Abstract

Purpose. The purpose of given work is the development of method for bearing capacity determination of metal spans with solid wall with upper-level traffic for the railway based on the results of static tests of given type of spans. Methodology. For the span that is being classificated the survey is being conducted and the deflection under the static load using simple measuring devises (deflectometers) are performed. Obtaining the deflection data is not complicated but gives the actual view of the span condition including hidden flaws (condition of bearing parts, corroded weakenings, that are very significant) Findings.. For the possibility of the given method of bearing capacity (class) determination for spans of given type application, first of all, from the numerous reports the selection was made of the main parameters of spans, results of static deflection measurements and load types. Based on the tests data the plot was drawn for the span experimental deflection dependence from the nominal span length. Originality. Based on the literature sources, this work is new in given direction and further such method is to be implemented for the common use by the development of the addition for the current standards [6]. Practical value. The analysis of obtained results shows that the application of given method on all the railways of Ukraine during the classification of metal spans will allow only by the recalculation to increase the actual bearing capacity of spans by 10..35 %.