Behavior of scoured bridge piers subjected to flood-induced loads

Hung, Chung-Chan; Yau, Wen Gi

doi:10.1016/j.engstruct.2014.09.009

Cited by 25 publications

(11 citation statements)

References 13 publications

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“…Road structures located within waterways such as floodways, culverts and bridges are assets that frequently sustain damage and/or catastrophic failure as a direct result of increased flood waters (BNHCRC, 2015). These road structures serve a vital role in post disaster recovery and need to be designed in a manner that allows them to remain open and serviceable both during and after extreme flood events (Hung & Yau, 2014). To achieve a flood-resilient design, time of exposure to flood events and/or minimizing vulnerabilities through incorporating proper structural mitigation measures is crucial (Chowdhooree & Islam, 2018).…”

Section: Figure (1)mentioning

confidence: 99%

Structural design of floodways under extreme flood loading

Greene

Lokuge

Karunasena

2020

IJDRBE

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Purpose Current methods for floodway design are predominately based on hydrological and hydraulic design principles. The purpose of this paper is to investigate a finite element methods approach for the inclusion of a simplified structural design method into floodway design procedures. Design/methodology/approach This research uses a three-dimensional finite element method to investigate numerically the different parameters, geometric configurations and loading combinations which cause floodway vulnerability during extreme flood events. The worst-case loading scenario is then used as the basis for design from which several structural design charts are deduced. These charts enable design bending moments and shear forces to be extracted and the cross-sectional area of steel and concrete to be designed in accordance with the relevant design codes for strength, serviceability and durability. Findings It was discovered that the analysed floodway structure is most vulnerable when impacted by a 4-tonne boulder, a 900 mm cut-off wall depth and with no downstream rock protection. Design charts were created, forming a simplified structural design process to strengthen the current hydraulic design approach provided in current floodway design guidelines. This developed procedure is demonstrated through application with an example floodway structural design. Originality/value The deduced structural design process will ensure floodway structures have adequate structural resilience, aiding in reduced maintenance and periods of unserviceability in the wake of extreme flood events.

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Section: Figure (1)mentioning

confidence: 99%

Structural design of floodways under extreme flood loading

Greene

Lokuge

Karunasena

2020

IJDRBE

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“…Scouring locally deepens the riverbed next to bridge piers, exposing a larger area of the pier to direct oncoming flow, thus subjecting them to greater hydrodynamic forces in comparison to nonscoured conditions [33]. Changes in hydrodynamic loading coinciding with other natural hazards, e.g., earthquakes, can have devastating consequences for both infrastructure and society [34].…”

Section: Introductionmentioning

confidence: 99%

Scour at Bridge Piers Protected by the Riprap Sloping Structure: A Review

Harasti

Gilja

Potočki

et al. 2021

Water

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Bridge piers on large rivers are often protected from scouring using launchable stone, such as a riprap sloping structure. While such scour countermeasures are effective for pier protection, they significantly alter flow conditions in the bridge opening by overtopping flow and flow contraction, deflecting the formation of the scour hole downstream and exposing the downstream riverbed to additional scour. This paper provides a comprehensive and relevant review of bridge scour estimation methods for piers with a riprap sloping structure installed as a scour countermeasure. Research on empirical methods for bridge scour estimation is reviewed and analyzed with formulae used for comparable structures—complex pier formulae and formulae for river training structures. A summary of relevant formulae applicable to piers with installed scour countermeasures is provided, as well as a discussion on the possible future research directions that could contribute to the field.

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“…Pasek and Frankl (2014) focused on analyses of the links influencing the extent and character of damage to wooden structures and other wood elements in buildings due to floodwater and its contaminants. Hung and Yau (2014) examined the influence of scour on the behavior of bridge piers subjected to flood-induced loading. Lonetti and Maletta (2018) proposed a comprehensive numerical approach simulating the fluid-structure interaction to study dynamic impact damage behavior of masonry buildings subjected to flood actions.…”

Section: Introductionmentioning

confidence: 99%

“…From the above literature review, it can be seen that research on building damage due to flood was mainly based on the flood surveys (Drd acký, 2010a(Drd acký, , 2010bHung & Yau, 2014;Jones, 1997;Kelman, 2002;Kelman & Spence, 2004;Kreibich et al, 2005;Liu, 2013;Witzany et al, 2008;Zhang et al, 2008). Some researchers were interested in the flood impact load behavior (Drd acký, 2010a; Mire & Juichiro, 2003;Nasim et al, 2019;Postacchini et al, 2019) and the impact action of flood on structures (Cuomo et al, 2009;Kingston et al, 2011;Pasek & Frankl, 2014;Schwarz & Maiwald, 2007;Van Liew, 2004).…”

Section: Introductionmentioning

confidence: 99%

Analysis of flood impacts on masonry structures and mitigation measures

Xiao

Guo

2021

J Flood Risk Management

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The impact of floods can be devastating to buildings, especially in countries and villages in mountainous areas. Based on the flood impact risk analysis results, two methods are suggested by authors to improve the flood impact defense capability of rural buildings in this paper: increasing the strength of the mortar used in masonry structures, as well as adding reinforced concrete (RC) columns and circle beams to masonry structures. The impact of floods on the reinforced masonry structures is simulated numerically, and the failure process, stress, and deformation behaviors of masonry structures are analyzed. Compared to the computational results of normal masonry structures, the advantages of the two methods proposed in this manuscript are studied. Increasing the mortar strength slows the rate of damage to the masonry structure but does not improve the deformation or the failure behaviors. Increasing the mortar strength slightly decreases the first principal stress on the mortar and brick elements but has no effect on the third principal stress. Adding the RC frames not only delays the damage to the building and improves the failure behavior of the masonry structure but also decreases the first and third principle stresses of the brick and mortar elements.

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Behavior of scoured bridge piers subjected to flood-induced loads

Cited by 25 publications

References 13 publications

Structural design of floodways under extreme flood loading

Structural design of floodways under extreme flood loading

Scour at Bridge Piers Protected by the Riprap Sloping Structure: A Review

Analysis of flood impacts on masonry structures and mitigation measures

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