独柱墩桥抗倾覆稳定性计算与加固

Study on Calculation of Anti-overturning Stability of Single-pillarPier Bridge and Reinforcement Method

为研究独柱墩抗倾覆稳定性系数计算方法及加固措施,阐释了独柱墩桥梁抗倾覆稳定性计算的基本原理及方法.以6座独柱墩连续梁桥为工程背景,采用有限元分析软件Midas Civil、An-sys分别建立了全桥有限元模型和钢盖梁局部精细化模型,并计算了其抗倾覆稳定性系数,验算了增设钢盖梁加固法的抗倾覆稳定性和强度.结果表明:独柱墩桥梁斜交角及曲线半径与抗倾覆稳定性呈反比;相同孔径组合下,相较于直桥和弯桥,斜交桥的抗倾覆稳定性最差;增设钢盖梁可有效改善独柱墩桥梁的抗倾覆稳定性.

In order to study the calculation method of the anti-overturning stability coefficient of single-pillar piers and reinforcement measures,the basic principles and methods of calculation of the anti-overturning stability of single-pillar pier bridges are explained.With 6 single-pillar pier continuous beam bridges as the engineering background,finite element software of Midas civil and ANSYS respectively are used to establish the finite ele-ment model of the full bridge and the local refined model of the steel cap beam,and calculate its anti-overturning stability coefficient,and check the anti-overturning stability and strength of the additional steel cap beam rein-forcement method.The study results show that the oblique intersection angle and curve radius of a single-pillar pier bridge are inversely proportional to the anti-overturning stability;under the same aperture combination,compared to straight bridges and curved bridges,the anti-overturning stability of skew bridges is the worst.The addition of steel cover beams can effectively improve the anti-overturning stability of single-pillar pier bridges.