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    Field Measurements and Simulation of Bridge Scour Depth Variations during Floods

    Source: Journal of Hydraulic Engineering:;2008:;Volume ( 134 ):;issue: 006
    Author:
    Jau-Yau Lu
    ,
    Jian-Hao Hong
    ,
    Chih-Chiang Su
    ,
    Chuan-Yi Wang
    ,
    Jihn-Sung Lai
    DOI: 10.1061/(ASCE)0733-9429(2008)134:6(810)
    Publisher: American Society of Civil Engineers
    Abstract: An understanding of bridge scour mechanisms during floods in a fluvial river is very important for cost-effective bridge foundation design. Reliable bridge scour data for flood events are limited. In this study, field experiments were performed at the Si-Lo Bridge in the lower Cho-Shui River, the longest river in Taiwan, to collect scour-depth data using a sliding magnetic collar, a steel rod, and a numbered-brick column. By separating each scour component, a methodology for simulating the temporal variations of the total scour depth under unsteady flow conditions is proposed. The proposed total-scour model integrates three scour components, namely general scour, contraction scour, and local scour. The collected field data, comprising both general scour and total scour depths, are used to validate the applicability of the proposed model. Based on the peak flow discharges during floods, a comparison of the local scour depths calculated using several commonly used equilibrium local scour formulas indicates that most equations may overestimate the local scour depth.
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      Field Measurements and Simulation of Bridge Scour Depth Variations during Floods

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    http://yetl.yabesh.ir/yetl1/handle/yetl/26524
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    contributor authorJau-Yau Lu
    contributor authorJian-Hao Hong
    contributor authorChih-Chiang Su
    contributor authorChuan-Yi Wang
    contributor authorJihn-Sung Lai
    date accessioned2017-05-08T20:46:09Z
    date available2017-05-08T20:46:09Z
    date copyrightJune 2008
    date issued2008
    identifier other%28asce%290733-9429%282008%29134%3A6%28810%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/26524
    description abstractAn understanding of bridge scour mechanisms during floods in a fluvial river is very important for cost-effective bridge foundation design. Reliable bridge scour data for flood events are limited. In this study, field experiments were performed at the Si-Lo Bridge in the lower Cho-Shui River, the longest river in Taiwan, to collect scour-depth data using a sliding magnetic collar, a steel rod, and a numbered-brick column. By separating each scour component, a methodology for simulating the temporal variations of the total scour depth under unsteady flow conditions is proposed. The proposed total-scour model integrates three scour components, namely general scour, contraction scour, and local scour. The collected field data, comprising both general scour and total scour depths, are used to validate the applicability of the proposed model. Based on the peak flow discharges during floods, a comparison of the local scour depths calculated using several commonly used equilibrium local scour formulas indicates that most equations may overestimate the local scour depth.
    publisherAmerican Society of Civil Engineers
    titleField Measurements and Simulation of Bridge Scour Depth Variations during Floods
    typeJournal Paper
    journal volume134
    journal issue6
    journal titleJournal of Hydraulic Engineering
    identifier doi10.1061/(ASCE)0733-9429(2008)134:6(810)
    treeJournal of Hydraulic Engineering:;2008:;Volume ( 134 ):;issue: 006
    contenttypeFulltext
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