考虑损伤因素的双曲拱桥建模方法及加固改造研究

Included in the damage modeling analysis and retrofitting research of a double arch bridge

通过对有限元单元类型的比选,采用空间梁单元和板单元相结合的方法建立双曲拱桥的有限元模型,对比分析了考虑损伤前后双曲拱桥的受力情况.根据实际工程的需求,提出由开口变闭口的箱型加固方案对此双曲拱桥进行加固改造,运用有限元软件ANSYS分析加固后双曲拱桥的受力情况和加固效果,验证了此方案的可行性.

Based on the comparison of finite element unit type,this paper discussed the use of space beam element and plate element modeling method to establish the two-way curved arch bridge finite element analysis model,compared and analysized the stress distribution of the two-way curvature arch bridge before and after damage.According to the practical engineering requirements,this two-way curvature arch bridge proposed reinforcement of the box from opening into closed,and used the computer software ANSYS to analysis the stress distribution after reinforcement and reinforcement effects.