摘要
Abstract
In order to promote the seismic performance of inner ribbed polyethylene spiral bellows in engineering practice,a three-dimensional numerical model of soil-pipe coupling was constructed based on finite element simulation method,and the stress and deformation characteristics of PE pipe under 9 degree seismic intensity were systematically studied by using time-history analysis method.The results showed that the pipe with a diameter of 550 mm and buried depth of 5m had low stress in all directions,and the Von Mises stress was 0.0 275 MPa and 0.0 395 MPa under independent pipe and soil-pipe coupling conditions,respectively,which was significantly lower than the yield stress of polyethylene material(20 MPa).The maximum deformation under the two working conditions is0.954 mm and0.892 mm respectively,both within the 1mm threshold,meeting the requirements of the specification.In conclusion,the seismic performance of polyethylene spiral bellows can be satisfied when the inner ribs are reinforced.关键词
螺旋波纹管/内肋增强/抗震性能/数值模拟Key words
Spiral bellows/Internal rib enhancement/Seismic performance/Numerical simulation分类
建筑与水利
