黄河二桥系杆拱桥桥面铺装层最不利荷位的确定

Determination of Critical Loading Position on Tied-arch Deck Pavement of the 2nd Yellow River Bridge

采用目前世界上通用的ANSYS有限元分析软件,对桥面铺装体系进行受力分析。利用移动荷载法确定铺装层间应力的包络面,通过各层间应力发生最大位置处的影响面按规范进行布载,研究了集中荷载作用下铺装层各种最大应力的变化规律,并确定与此对应的最不利荷位。

The universal finite element software of ANSYS was utilized in the mechanical analysis of pavement system on bridge deck. Firstly, the enveloping surface of the interface stress on bridge deck pavement was determined by means of moving loads. Then loads were arranged across the maximum stress influence surface of all the layers according to the criterion. Finally, the variation laws on several types of maximum stress in bridge deck pavement under concentrated load were explored, and thus the corresponding critical loading positions were determined.