The paper focuses on the structural behaviour of asphalt pavements on steel bridges and on the influence of the pavement on the reduction of stresses and strains in orthotropic decks. For this aim a simplified model has been proposed for evaluating the effects attributable to local bending of the steel deck. This model can be represented by a simply supported continuous plate that is made by the pavement, waterproofing, and deck. The pavement and waterproofing are considered to be an integral part of the structural deck system. Based on this model, a finite-element software was used for estimating stresses and strains both in the pavement and deck as a function of loads, temperatures, and dynamic modulus of asphalt mixture. The results showed that tensile stresses and strains at the bottom of the pavement due to the positive bending moment are higher than those at the top of the pavement produced by negative bending moment. The pavement contributed significantly towards reducing stresses and strains in the orthotropic deck by increasing the dynamic modulus of asphalt mixture. This means that a higher fatigue life of steel orthotropic decks might be expected. Thus, it is proposed that bridge designers should take these results into account.

Stress and Strain Reductions due to Asphalt Pavements on Orthotropic Steel Bridge Decks

CALIENDO, Ciro
2004-01-01

Abstract

The paper focuses on the structural behaviour of asphalt pavements on steel bridges and on the influence of the pavement on the reduction of stresses and strains in orthotropic decks. For this aim a simplified model has been proposed for evaluating the effects attributable to local bending of the steel deck. This model can be represented by a simply supported continuous plate that is made by the pavement, waterproofing, and deck. The pavement and waterproofing are considered to be an integral part of the structural deck system. Based on this model, a finite-element software was used for estimating stresses and strains both in the pavement and deck as a function of loads, temperatures, and dynamic modulus of asphalt mixture. The results showed that tensile stresses and strains at the bottom of the pavement due to the positive bending moment are higher than those at the top of the pavement produced by negative bending moment. The pavement contributed significantly towards reducing stresses and strains in the orthotropic deck by increasing the dynamic modulus of asphalt mixture. This means that a higher fatigue life of steel orthotropic decks might be expected. Thus, it is proposed that bridge designers should take these results into account.
2004
8887030774
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/1869701
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact