Strengthening of the riveted steel railway bridges

Istaknuta je činjenica da su mnogi željeznički čelični mostovi davno izvedeni, posebno oni kod kojih su spojna sredstva zakovice. Te je mostove potrebno ojačavati zbog povećanog opterećenja i većih dinamičkih utjecaja. Prikazano je neadekvatno projektno rješenje i analizirane nepovoljne posljedice njegove primjene. Opisano je i prikladnije rješenje, primijenjeno pri ojačanju jednog mosta. Kritički se ocjenjuju oba opisana projekta i sugerira se jedno od poboljšanih rješenja.It is emphasized that many of the existing steel railway bridges have been built a long time ago, especially those in which riveted connections are used. Such bridges should be strengthened to take into account an increase in traffic load and higher dynamic influences. An inadequate design solution is presented and unfavorable effects of its implementation are analyzed. A more adequate solution, used in the strengthening of an existing bridge, is also described. Both designs are critically analyzed and one of the suggested solutions is recommended