不同跨径半圆形钢波纹管涵的力学性能研究

Study on Mechanical Properties of Semi-circular Steel Corrugated Pipe Culverts with Different Spans

摘要:

基于精细化ABAQUS有限元分析模型，对不同跨径半圆形钢波纹管涵在施工过程和运营状态下的力学性能进行研究。结果表明：回填施工完成时，随着半圆形钢波纹管涵跨径增加，管涵拱顶处竖向变形和弯矩增大；当两侧填土高度接近管涵矢高时，拱顶处上拱变形达到最大值；当管涵跨径大于12.5 m时，拱顶处竖向变形受填土高度影响明显，回填完成后的拱顶轴向应力无明显变化，活载作用有利于降低拱顶处轴向应力和弯矩。

Abstract:

Based on the refined ABAQUS finite element analysis model, the mechanical properties of semi-circular steel corrugated pipe culverts with different spans during construction and operation are studied. The results show that with the span increase of the semi-circular steel corrugated pipe culvert after the completion of backfill construction, the vertical deformation and bending moment at the vault of pipe culvert increase. When the height of the fill at both sides is close to the vector height of the pipe culvert, the upper deformation at the vault reaches its maximum value. When the span of pipe culvert is greater than 12.5 m, the vertical deformation at the vault is significantly affected by the height of the fill, but there is no significant change in the axial stress of the vault after backfilling. The live load effect is beneficial to reduce the axial stress and bending moment at the vault.