Analysis on Structure Force of Double-wall Steel Cofferdam of Jialing River Bridge Ⅲ
Relying on Jialing River Bridge Ⅲ Project in Pengan,the finite element simulation software of Midas Civil is used to establish a finite element calculation model of double-wall steel cofferdam.The mechanical behavior response of double-wall steel cofferdam under the most unfavorable working conditions is analyzed by considering the structural dead weight,hydrostatic pressure,flowing pressure and construction load.The results show that the longitudinal stiffeners and horizontal skew braces are the weak force parts of double-wall steel cofferdam.It is of great significance to optimize the layout of longitudinal stiffeners and horizontal skew braces to maintain the structural integrity and to avoid the local buckling.Secondly,increasing the height of the concrete in the sandwich wall plays an important role in improving the overall force of the steel cofferdam and reducing the stress concentration.By calculating after the optimization design,the strength,stiffness,stability(integral,local and anti-float-ing)of double-wall steel cofferdam can meet the requirements.
double-wall steel cofferdamfinite element methodstabilitystructural analysis
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