Regularity Criteria for RC and PRC Multispan Continuous Bridges

Grendene, Manuel; Franchetti, Paolo; Modena, Claudio

doi:10.1061/(asce)be.1943-5592.0000267

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…The irregularity associated with the substructure of such bridges results in unbalanced seismic demand in piers of varied stiffnesses, where the stiffer piers attract greater seismic inertia forces and ductility demands. A significant deal of research has been dedicated to investigating the seismic behaviour of irregular multi-span RC bridges [21][22][23][24][25][26][27][28][29][30]. The state-of-theart studies on the seismic performance and irregularity criteria of concrete bridges are comprehensively reviewed by Akbari and Maalek [23].…”

Section: Introductionmentioning

confidence: 99%

Seismic vulnerability analysis of irregular multi-span concrete bridges with different corrosion damage scenarios

Dizaj

Salami

Kashani

2023

Soil Dynamics and Earthquake Engineering

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Section: Introductionmentioning

confidence: 99%

Seismic vulnerability analysis of irregular multi-span concrete bridges with different corrosion damage scenarios

Dizaj

Salami

Kashani

2023

Soil Dynamics and Earthquake Engineering

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“…is index is calculated using the simplified elastic UL, SM, or MM analysis methods as presented in AASHTO specifications [7]. A criterion of structural regularity for reinforced concrete multispan bridges was proposed by Grendene et al which is based on equivalent single degree-of-freedom system [8]. ey concluded that when the deck is stiff enough to control pier displacements, and the distribution of pier's stiffness is symmetric, the proposed criterion offers reasonable accuracy.…”

Section: Introductionmentioning

confidence: 99%

New Extended Quantitative Local and Global Regularity Index for Single‐ and Multiframe RC Bridges Based on Modal Vector Correlation

Aboutorabian

Dehkordi

2021

Shock and Vibration

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Seismic demand and performance of bridges are highly dependent upon the level of irregularity. Although previous studies have proposed methodologies so as to quantify the irregularity of the bridges in terms of global regularity index, it still remains unclear how to determine the distribution of irregularity along a bridge, as well as to discover the irregularity sources. This research project is intended to develop a quantitative vector regularity criterion for single- and multiframe bridges based on the modified correlation function for spatial locations of scaled mode shapes of deck-alone and whole bridge. The proposed criterion calculates two types of regularity indices, namely, local (LRI) and global regularity indices (GRI). The GRI is a scalar value representing the overall regularity of the entire bridge, whereas the LRI highlights vector irregularity distribution along the bridge. Since the deck discontinuity due to the in-span hinges is one of the leading causes for irregularity, the proposed index has been employed in case of multiframe bridges as well. Furthermore, the current study aims to investigate the correlation between the proposed irregularity indicators and the nonlinear to linear demand ratio. Therefore, the appropriate analysis method can be chosen based on irregularity extent of bridges. Obtained results of the proposed indices reveal that in-span hinge is one of the main parameters affecting the distribution of local irregularity along a bridge. Therefore, multiframe bridges need to be investigated in detail so as to validate the special design requirements recommended by design codes.

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Modal Combination Rule for Shock Spectrum Analysis of Bridge Structures Subjected to Barge Collisions

2016

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Regularity Criteria for RC and PRC Multispan Continuous Bridges

Cited by 5 publications

References 1 publication

Seismic vulnerability analysis of irregular multi-span concrete bridges with different corrosion damage scenarios

Seismic vulnerability analysis of irregular multi-span concrete bridges with different corrosion damage scenarios

New Extended Quantitative Local and Global Regularity Index for Single‐ and Multiframe RC Bridges Based on Modal Vector Correlation

Modal Combination Rule for Shock Spectrum Analysis of Bridge Structures Subjected to Barge Collisions

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