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<p>In this study 40 reinforced concrete bridges, including 10 regular and 30 irregular bridges have been studied parametrically, which were simulated by considering different incident angles of near and far earthquake waves. All reinforced concrete bridges are designed based to AASHTO standard criteria. The results show that with the increase of the incident angle under the effect of near and far-field records, the longitudinal displacement of the deck in regular mode has decreased by 84% and 90%, and the transverse displacement of the deck has increased by 93% and 97%, respectively. The most critical angle of incident is 40 degrees in which maximum increase of 10% and 38% in column moment for regular and irregular bridges has been observed under the effect of near field records. These amounts are 11% and 46% for far field earthquakes. The axial force of the column has not changed significantly by the change of the incident angle. In all the investigated models, it was observed that creating irregularity in the bridge geometry has increased the longitudinal and transverse displacement of the deck, the axial force and the bending moment created in the bridge columns.</p>

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Effect of incident angle of seismic waves on seismic behavior of irregular bridges

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Behzad Haseli,
  • Mohammadreza Mozaffarpour Taromi,
  • Gholamreza Nouri,
  • Noureddin Sadeghi,
  • Mostafa Nowruzianostad,
  • Ehsan Adili

摘要

In this study 40 reinforced concrete bridges, including 10 regular and 30 irregular bridges have been studied parametrically, which were simulated by considering different incident angles of near and far earthquake waves. All reinforced concrete bridges are designed based to AASHTO standard criteria. The results show that with the increase of the incident angle under the effect of near and far-field records, the longitudinal displacement of the deck in regular mode has decreased by 84% and 90%, and the transverse displacement of the deck has increased by 93% and 97%, respectively. The most critical angle of incident is 40 degrees in which maximum increase of 10% and 38% in column moment for regular and irregular bridges has been observed under the effect of near field records. These amounts are 11% and 46% for far field earthquakes. The axial force of the column has not changed significantly by the change of the incident angle. In all the investigated models, it was observed that creating irregularity in the bridge geometry has increased the longitudinal and transverse displacement of the deck, the axial force and the bending moment created in the bridge columns.