Modeling of Progressive Scouring of a Pier-on-Bank

CivilEng

Wenwu Tang¹  Shen-En Chen²  Nicole Braxtan²  Craig Allan³  John Diemer³  Tianyang Chen³  Zachery Slocum³  Tarini Shukla⁴  Vidya Subhash Chavan⁴  Navanit Sri Shanmugam⁴ 

[1] Center for Applied Geographical Information Sciences (CAGIS), Department of Geography and Earth Sciences, University of North Carolina at Charlotte, Charlotte, NC 28223, USA;Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA;Department of Geography and Earth Sciences, University of North Carolina at Charlotte, Charlotte, NC 28223, USA;INES (Infrastructure and Environmental Systems) PhD Program, Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA;

关键词: local scour;    lidar scan;    bridge piers;    finite element;   

DOI  :  10.3390/civileng3020022

来源: DOAJ

【 摘 要 】

Scour, caused by swiftly moving water, can remove alluvial sediment and soil, creating holes surrounding a bridge component and compromising the integrity of the bridge structure. Such problems can be equally critical for bridges with piers-on-bank bridges subjected to severe storm and flooding issues. In this paper, the Phillips Road Bridge over Toby Creek (35°18′28.2″ N 80°44′16.6″ W, Charlotte, NC, USA), a pier-on-bank bridge with critical/significant local scour holes and deep riverbank erosion cuts was selected as case study bridge. To investigate the scour effect on the bridge with pier-on-bank performance, the scoured area around a single pier is first quantified using a terrestrial laser and then modeled using nonlinear finite element (FE) analysis, where the local scour is modeled as progressive mass losses using the Element Removal (ER) technique. The FE results are compared to the design loading scenario and the results substantiated that the local scouring could cause large deflection and increased bending moment on the bridge pier.

【 授权许可】

Unknown